Entries |
Document | Title | Date |
20080200134 | TRANSMITTER CIRCUIT - A transmitter circuit. One embodiment provides for emitting electromagnetic waves. The circuit has a transmitting device for outputting a transmission signal, an antenna device for emitting the transmission signal in the form of an electromagnetic wave, and a matching device which is electrically connected to the transmitting device and to the antenna device. The matching device includes at least two tuning elements for setting the resonant frequency of a circuit arrangement, formed from the antenna device and the first and second tuning elements, and for matching the impedance of the transmitting device and the antenna device. | 08-21-2008 |
20080207150 | PREAMBLE BASED UPLINK POWER CONTROL FOR LTE - Systems and methodologies are described that facilitate utilizing power control preambles with closed loop power control techniques in a wireless communication environment. An uplink grant can be transferred over a downlink (e.g., a first uplink grant after uplink inactivity), and a power control preamble can be sent over an uplink in response to the uplink grant. According to an example, transmission of the power control preamble can be explicitly scheduled and/or implicitly scheduled. The power control preamble can be transmitted at a power level determined by an access terminal utilizing an open loop power control mechanism. A base station can analyze the power control preamble and generate a power control command based thereupon to correct the power level employed by the access terminal. The access terminal can thereafter utilize the power control command to adjust the power level for uplink data transmission. | 08-28-2008 |
20080242246 | Rf Transmitter With Compensation of Differential Path Delay - A transmitter has a power amplifier ( | 10-02-2008 |
20080248767 | SYSTEM AND METHOD FOR DETECTING RADIO FREQUENCY SIGNALS OVER A RANGE OF POWERS - The present invention is directed to a power detection circuit for use in a wireless transmitting device. The circuit makes use of multiple gain paths so that two or more scaling factors are provided. Each scaling factor allows the detector circuit to provide more ADC levels per dB and thus provide accurate power control over a wider power range than through the use of a single gain path and a single scaling factor. | 10-09-2008 |
20080261545 | COMMUNICATION TERMINAL APPARATUS AND BASE STATION APPARATUS - An allocation section | 10-23-2008 |
20080268796 | RADIO COMMUNICATION DEVICE AND POWER SUPPLYING METHOD FOR RADIO COMMUNICATION DEVICE - A radio communication device in which the output transmission signal of a high-frequency power amplifying part is sent out to an antenna via a circulator, a high-frequency signal reflected from the antenna is transferred via the circulator to a rectifying part to obtain a direct current power, and the direct current power is supplied to a power amplifying part or another constituent part in the radio communication device as an aid to the power supply from a power supply unit. | 10-30-2008 |
20080268797 | APPARATUS AND METHOD FOR LOW POWER AMPLIFICATION IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for beamforming with less heat in a wireless communication system including multiple antennas are provided. The apparatus includes a digital signal processor for processing at least one baseband digital signal, and at least one Radio Frequency (RF) signal processor for converting a respective baseband digital signal of the at least one baseband digital signal into an RF analog signal and for amplifying a power of the RF analog signal for one or more antenna elements constituting a respective antenna of the at least one antenna. | 10-30-2008 |
20080280575 | Transmitter emission control - The present invention relates to transmitter emission control. An apparatus is provided with a power amplifier and a power control part operatively connected to the power amplifier. The power control part is configured to receive an indication of a spectrum mask requirement and control supply power of the power amplifier on the basis of the indication of the spectrum mask requirement. | 11-13-2008 |
20080287078 | Terminal and Method for Controlling Transmission Power - A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter. | 11-20-2008 |
20080287079 | TRANSMITTER, RF TRANSMITTER SIGNAL PROCESSOR AND METHOD FOR OPERATION OF TRANSMITTER - An internal operation of RF IC is adjusted so that the level of an RF transmitter signal is substantially stopped from rising, or made to descend in course of ramp-up of the RF transmitter signal. This adjustment is enabled by ramp-up adjustment data Last 4 symbols contained in preamble data precedent to real transmission data transmitted after completion of ramp-up. The ramp-up adjustment data and real transmission data are supplied from a baseband LSI. The RF transmitter signal contains phase and amplitude modulation components according to the EDGE system. RF IC includes phase and amplitude modulation control loops PM LP and AM LP. Ramp-up of RF power amplifiers PA | 11-20-2008 |
20080299923 | Wireless Subscriber Communication Unit and Method of Power Control with Back-Off Thererfore - A wireless subscriber communication unit comprises a transmitter having a power amplifier and a feedback power control loop having a power control function arranged to set an output power level of the power amplifier. The power control function is arranged to perform a back-off of the output power prior to completion of a transmission burst. | 12-04-2008 |
20080311866 | Reconfiguration in Radio Communication Systems - A radio communication system ( | 12-18-2008 |
20090004980 | Data Communication Using Constant Total Current - A data communication system, comprising at least three signal conductors and a first and a second power supply terminal, for supplying currents of mutually opposite direction to the signal conductors respectively. A driver circuit establishes respective combinations of currents through the signal conductors from a selectable set of combinations, which includes combinations with currents from the first supply terminal and to the second supply terminal, so that a sum of the currents through the signal conductors substantially has a same value for each combination and at least one of the conductors in operation does not merely function in a differential-pair relation with another one of the conductors, the driver circuit determining which of the combinations from the set are established depending on information to be transmitted. | 01-01-2009 |
20090004981 | HIGH EFFICIENCY DIGITAL TRANSMITTER INCORPORATING SWITCHING POWER SUPPLY AND LINEAR POWER AMPLIFIER - A novel apparatus and method of improving the power efficiency of a digital transmitter for non-constant-amplitude modulation schemes. The power efficiency improvement mechanism of the invention leverages the high efficiency of a switched-mode power supply (SMPS) that supplies the high DC current to the transmitter's power amplifier, while compensating for its limitations using predistortion. The predistortion may be achieved using any suitable technique such as digital signal processing, hardware techniques, etc. A switched mode power supply (i.e. switching regulator) is used to provide a slow form (i.e. reduced bandwidth) of envelope tracking (based on a narrower bandwidth distorted version of the envelope waveform) such that the switching regulator can use a lower switching rate corresponding to the lower bandwidth, thereby obtaining high efficiency in the switching regulator. The resulting AM-AM and AM-PM distortions in the power amplifier are compensated through predistortion of the digital amplitude modulating signal which dictates the envelope at the PA input. Similarly, the phase modulation is also compensated prior to the PA, such that once it undergoes the distortion in the PA, the end result is sufficiently close to the desired phase. | 01-01-2009 |
20090011727 | WIRELESS TRANSMITTER - A wireless transmission device includes a RF power amplification section for amplifying a transmit RF signal and outputting the amplified signal to a transmission antenna, a detector section, and a control section. The RF power amplification section includes a plurality of stages of amplification, the transmit RF signal is input to an input of a first one of the plurality of stages of amplification, and an output of a last one of the plurality of stages of amplification is output to the transmission antenna. The detector section includes a plurality of detectors provided so as to correspond to the plurality of stages of amplification, each for detecting an input level of a corresponding one of the stages of amplification, and a synthesizer for synthesizing together detection outputs from the plurality of detectors. The control section controls, in a feedback control, an output level of the RF power amplification section based on an output level of the synthesizer. | 01-08-2009 |
20090011728 | DCDC converter unit, power amplifier, and base station using the same - A DCDC converter includes a signal splitting unit that splits an input signal into N signal components; N DCDC converter elements that process individually the N split signals; and an adder that adds outputs from the plural DCDC converter elements to generate output signals. Each of the DCDC converter elements has an operation band narrower than an applicable frequency band of the input signal, and selects a design parameter that allows a conversion efficiency of the DCDC converter elements to be optimized for any band of the applicable frequency bands. For example, the parameter of a PMOS transistor and a NMOS transistor, which configure an inverter is designed to optimize the efficiency at any of frequency bands. The frequency band of the input signal is split, and each of the split outputs is input to a DCDC converter element that has a corresponding frequency and high efficiency characteristic. | 01-08-2009 |
20090011729 | FM TRANSMITTER - An FM transmitter which can be easily connected to an existing computer or the like and does not need any troublesome operation is provided. An FM transmitter | 01-08-2009 |
20090017781 | TRANSMITTING APPARATUS AND METHOD - Communication with less noise is to be performed. A voltage value control signal functioning as an instruction to change the voltage value supplied from a voltage converting section to an LFI is output from a CPU. A driving section for the LFI outputs the control signal at 125 kHz that drives an FET circuit section according to the voltage value supplied from an ECU. The FET circuit section outputs the driving current for an antenna under the control of the driving section. A connecter terminal that connects to a harness is connected to a connecter terminal for GND connection along with the GND terminal of the voltage converting section. A connecter terminal that connects to a harness is connected to a connecter terminal for GND connection along with the GND terminal of the FET circuit section. | 01-15-2009 |
20090029659 | RF CIRCUIT WITH CONTROL UNIT TO REDUCE SIGNAL POWER UNDER APPROPRIATE CONDITIONS - A disclosed RF circuit includes a power amplifier that produces an RF output signal, a detector to generate a detector signal indicative of a power of the RF output signal, and an offset unit to produce an offset signal that indicates low supply voltage conditions. The power of the RF output signal is reduced, at least in part, by a control signal reflecting a combination of the detector signal and the offset signal. The circuit may include a transmitter to provide an RF input signal to the power amplifier. The transmitter may receive the control signal and adjust a power of the RF input signal based on the control signal. The detector may produce a control current indicative of the RF output signal power. The offset unit produces the offset signal based on a difference between the supply voltage and a nominal supply voltage value. | 01-29-2009 |
20090029660 | POWER APPARATUS, WIRELESS COMMUNICATION APPARATUS HAVING THE SAME, AND POWER SUPPLYING METHOD THEREOF - A wireless communication apparatus includes: a wireless communication unit which performs wireless communication; a converter which converts an input voltage into an output voltage in a switched-mode to supply the output voltage to the wireless communication unit; and a frequency adjusting unit which adjusts a frequency of a high frequency noise caused by a parasitic component of the converter, if the converter is switched, to prevent the frequency of the high frequency noise from interfering with a frequency of the wireless communication performed by the wireless communication unit. | 01-29-2009 |
20090036071 | NULL DETECTOR AND METHOD THEREOF - A null detector and its corresponding method are provided. The null detector includes a power detector, a smoother, and an overlapper. The power detector outputs a power level signal according to the power level of a received signal. The smoother is coupled to the power detector for determining according to the power level signal whether the received signal is transmitting a null symbol, and then the smoother outputs a null detection signal at a first state value or a second state value indicating the result of the determination. The overlapper is coupled to the smoother for providing the duration and position of the null symbols transmitted by the received signal according to the null detection signal. | 02-05-2009 |
20090047917 | Signal Amplifiers Having Non-Interruptible Communication Paths - RF signal amplifiers are provided that include an RF input port, a first RF output port, a second RF output port and a power input for receiving electrical power. These amplifiers include a first communication path between the RF input port and the first RF output port that has a power amplifier that amplifies signals that are transmitted from the RF input port to the first RF output port. These amplifiers also have a second non-interruptible communication path between the RF input port and the second RF output port. The amplifiers further include a selective termination circuit that is configured to pass signals between the RF input port and the first RF output port over the first communication path when electrical power is received at the power input and to terminate the first communication path to a matched termination when an electrical power feed to the power input is interrupted. | 02-19-2009 |
20090054019 | TRANSMISSION POWER CONTROL SYSTEM, METHOD THEREFOR, AND BASE STATION AND MOBILE COMMUNICATION TERMINAL THAT ARE USED THEREIN - HS-SCCH transmission power is controlled on a transmitting side depending on whether HS-DSCH transmission is to be executed, so as to maintain total reception power on a receiving side at a constant level. More specifically, the HS-SCCH transmission power of P | 02-26-2009 |
20090061797 | MOBILE TRANSMITTER AND TRANSMITTING METHOD THEREOF - Provided is a mobile transmitter and a transmitting method thereof. The mobile transmitter includes a transmission circuit and a control circuit. The transmission circuit selectively operates as a polar transmitter or a direct-conversion transmitter. The control circuit controls an operation of the transmission circuit based on the level of an output signal. The mobile transmitter operates as a direct-conversion transmitter using a linear power amplifier with a high dynamic range when it transmits a low-power signal. Also, the mobile transmitter operates as a polar transmitter using a switching power amplifier with a high power efficiency when it transmits a medium-power or high-power signal. Thus, the mobile transmitter according to the present invention can provide both the high power efficiency (i.e., the advantage of the switching power amplifier) and the high dynamic range (i.e., the advantage of the linear power amplifier). Consequently, it possible to increase the battery lifetime of a personal portable communication terminal and also to implement to a compound terminal that can satisfy a variety of communication standards with a high dynamic range. | 03-05-2009 |
20090068966 | Error Driven RF Power Amplifier Control with Increased Efficiency - A power amplifier controller for adjusting a supply voltage to a power amplifier. The power amplifier controller adjusts the supply voltage so that distortion in an RF output signal corresponds to a predetermined limit. An amplitude error signal is generated by the power amplifier controller which represents a difference between an RF output signal and an attenuated RF output signal. The AC components of the amplitude error signal are processed to generate a deviation signal that represents the distortion in the RF output signal. The supply voltage to the power amplifier is increased when the deviation signal exceeds a distortion level control signal, and decreased when the deviation signal drops below the distortion level control signal. | 03-12-2009 |
20090075607 | Method and System for Adjusting Interconnect Voltage Levels in Low Power High-Speed Differential Interfaces - The present invention relates to adjustment of interconnect power levels in high-speed differential serial links. In an example embodiment, a digital signal received at a digital input port is converted in a driver into a corresponding differential signal and provided to output ports connected to a differential transmission line for provision to a receiver. For adjusting the interconnect power levels between the driver and the receiver a voltage regulator is interposed between a voltage source and the driver. The voltage regulator provides regulated supply voltage to the driver. In operation, the voltage regulator receives from control circuitry a control signal indicative of a predetermined regulated voltage for provision to the driver for a pre-selected type of data transmission. In dependence upon the received control signal the voltage regulator selects the corresponding reference voltage and provides it to the driver. The adjustment of interconnect power levels is highly beneficial by enabling a substantial reduction of power consumption. | 03-19-2009 |
20090081971 | POWER CONSUMPTION MANAGEMENT AND DATA RATE CONTROL BASED ON TRANSMIT POWER AND METHOD FOR USE THEREWITH - An integrated circuit (IC) includes an RF transmitter that transmits a transmit signal at a selectable transmit power based on a transmit power control signal and at a selectable data rate based on a transmit data rate signal. A processing module operates to generate the transmit power control signal and generate the transmit data rate signal based on a value of the transmit power control signal. | 03-26-2009 |
20090081972 | INDEPENDENT POWER CONSUMPTION MANAGEMENT IN A MIMO TRANSCEIVER AND METHOD FOR USE THEREWITH - An integrated circuit (IC) includes a multi-input multi-output transceiver system that includes a plurality of RF transceivers. Each RF transceiver includes an RF transmitter that transmits a transmit signal at a selected transmit power, based on a transmit power control signal and a corresponding RF receiver for receiving a corresponding one of a plurality of received signals from an external device and for generating a signal strength indication corresponding to each of the plurality of received signals. A processing module generates the transmit power control signal for each RF transmitter based on the signal strength indication of the corresponding RF receiver, and that generates a power mode signal for adjusting a power consumption parameter of each RF transmitter in accordance with the selected transmit power for each RF transmitter. | 03-26-2009 |
20090081973 | Multi-slot power control for wireless transmission - Methods and apparatus are provided for controlling transmitted power in a wireless system. The method includes generating information to be transmitted as a series of signal bursts, with a time interval between successive signal bursts, controlling individually a power level of each of said signal bursts with a power control signal to provide output signal bursts to be transmitted, and asserting a new power value of the power control signal during the time interval preceding each signal burst. The wireless system can be a TDSCDMA wireless system, and the signal bursts can be uplink signal bursts. | 03-26-2009 |
20090088096 | APPARATUS AND METHOD FOR POWER AMPLIFICATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for power amplification in a wireless communication system are provided. The apparatus includes an envelope generator for generating an envelope signal from a Radio Frequency (RF) signal, a switching controller for generating a first switching control signal by delta-sigma modulating the envelope signal, and for generating a second switching control signal by amplifying an error signal obtained from a difference between an envelope signal restored by filtering the modulated envelope signal and an original envelope signal and an amplifier for outputting a first output signal by amplifying a phase signal according to the first switching control signal, for outputting a second output signal by amplifying the phase signal according to the second switching control signal, and for combining the first output signal and the second output signal. Thus, high efficiency and high linearity can be accomplished in the power amplification. | 04-02-2009 |
20090088097 | Global Management of Local Link Power Consumption - Power reduction in links, such as transmitters and receivers, based upon global decisions such as the data transmission frequencies, communications media, and traffic types associated with links, is disclosed. In particular, embodiments take advantage of high-level decisions by reconfiguring internal circuits of transmitters and receivers of links to reduce power consumption. At the global level, a decision determines the links that are active, the data frequency at which the links operate, and the media through which the links transmit the data. At the local level, the links receive the decisions and reconfigure circuitry automatically to minimize power based upon the decisions. In some embodiments, the links may receive the decisions in the form of power modes. In further embodiments, the links may receive settings such as on/off settings, data frequency settings, and traffic/media settings, the combination of which indicates power modes. | 04-02-2009 |
20090111400 | POWER CONTROL USING BIT RATE AND OUTSTANDING USER TRAFFIC - The present invention relates to cellular mobile radio systems, and more especially it relates to multi-cell interference-limited environments, such as Orthogonal Frequency Division Multiple Access, OFDMA, and Code Division Multiple Access, CDMA, cellular mobile radio systems. Particularly, it relates to transmission power allocation in such systems. Method and systems where transmission power is based on parameters directly affecting perceived user performance parameters are disclosed. | 04-30-2009 |
20090117864 | SWITCHABLE-LEVEL VOLTAGE SUPPLIES FOR MULTIMODE COMMUNICATIONS - Switchable voltage level supplies for circuitry in a multi-mode communications chipset are disclosed. In an embodiment, a first voltage level is supplied to TX circuitry operating in a first mode having a first set of linearity and/or noise requirements. A second voltage level lower than the first voltage level is supplied to TX circuitry operating in a second mode having a second set of linearity and/or noise requirements looser than the first set of requirements. The first mode may be operation according to the GSM standard, and the second mode may be operation according to the W-CDMA standard. | 05-07-2009 |
20090117865 | RF POWER AMPLIFIER CONTROLLED BY ESTIMATED DISTORTION LEVEL OF OUTPUT SIGNAL OF POWER AMPLIFIER - A radio frequency (RF) power amplifier system is provided, in which a distortion of the RF output signal from the power amplifier is estimated by comparing the RF output signal with reference modulation information. The supply voltage to the power amplifier is adjusted so that the estimated distortion of the RF output signal corresponds to a predetermined distortion level. The predetermined distortion level is set to represent an acceptable distortion level at the RF output signal. | 05-07-2009 |
20090130998 | ARCHITECTURAL TECHNIQUES FOR ENVELOPE AND PHASE SIGNAL ALIGNMENT IN RF POLAR TRANSMITTERS USING POWER AMPLIFIER FEEDBACK - In an envelope comparison embodiment, a delay calibrator produces a delay signal based on a comparison of a feedback signal and an envelope component of the transmitted signal. A down-converter produces the feedback signal from an outgoing modulated RF signal based on at least one local oscillation. Envelope detectors in the delay calibrator and the envelope signal path are operably coupled to a summing node that produces a delay error signal based on a temporal difference between the two envelopes. One embodiment includes phase detectors to detect and adjust the zero crossings of the feedback signal and the envelope signal path. As the delay mismatch between the envelope signal path and the phase signal path increases, the power spectrum increases in adjacent communication channels. A mask margin measurement technique measures the power level in an adjacent channel and adjusts the envelope path delay accordingly. | 05-21-2009 |
20090137218 | WIRELESS COMMUNICATION APPARATUS, POWER AMPLIFIER CONTROL METHOD, AND POWER AMPLIFIER CONTROL APPARATUS - In a wireless communication apparatus in a time division duplex system, a transmission signal generation unit generates a transmission signal. A power amplifying device amplifies the generated transmission signal. A control signal generation device generates a drain voltage control signal for control of the drain voltage of the power amplifying device, and a gate voltage control signal for control of the gate voltage of the power amplifying device. The switch unit switches off the drain power supply of the power amplifying device during reception in the time division duplex system according to the drain voltage control signal. In addition, the power amplifying device sets a higher gate voltage during reception in the time division duplex system higher than during transmission according to the gate voltage control signal. | 05-28-2009 |
20090143032 | Control circuit and control method - There is provided a control circuit including a sampling controller configured to sample an output voltage of a power converter at an appropriate time slot by opening a control loop. A soft-start circuit configured to enable soft-starting of an internal soft-start reference voltage to start from the sampled output voltage and to control the internal soft-start reference voltage to a predetermined target value in order to pre-charge the output voltage close to an input voltage level, or to continue charging the output voltage to a predetermined output voltage value. | 06-04-2009 |
20090163156 | DAC BASED SWITCHING POWER AMPLIFIER - A power amplifier for use in a transmitter includes a first transistor having an input, a first node and a second node, a second transistor having an input, a first node and a second node and a digital to analog conversion module. The input of the first transistor is coupled to receive a first input, while the input of the second transistor is coupled to receive a second input. The second nodes of the first and second transistors provide an output of the power amplifier. The digital to analog conversion module is coupled to control current through the first and second transistors. | 06-25-2009 |
20090163157 | CONFIGURABLE TRANSMITTER - According to an example embodiment, an apparatus may be provided that is configurable to operate in either a separate power amplifier configuration or a combined power amplifier configuration. | 06-25-2009 |
20090170453 | DEVICE, SYSTEM, AND METHOD OF PROVIDING BIASING POWER - Device, system, and method of providing biasing power. For example, an apparatus includes a voltage-controlled current source to provide biasing current to a Radio Frequency power amplifier based on a voltage of an incoming signal indicating a command to activate the Radio Frequency power amplifier, the incoming signal received from a Radio Frequency baseband module; and a current-reducing circuit to reduce the biasing current if the voltage of the incoming signal is greater than or equal to a voltage overdrive threshold. | 07-02-2009 |
20090176466 | Apparatuses and a Method for Reducing Peak Power in a Transmitter of Telecommunications Systems - The present invention relates to an apparatus ( | 07-09-2009 |
20090181628 | METHOD, DEVICE AND SYSTEM OF REDUCED PEAK-TO-AVERAGE-RATIO COMMUNICATION - Some embodiments include devices, methods and/or systems of reduced peak-to-average-ratio communication. An apparatus may include a transmitter to transmit a transmission corresponding to an input signal, wherein the transmitter may include a peak-to-average-ratio-reduction transformer to generate a plurality of transformed data components by applying a predefined peak-to-average-ratio-reduction transform scheme to a plurality of fine constellation data components corresponding to the input signal, wherein a peak-to-average-ratio corresponding to the plurality of transformed data components is lower than a peak-to-average-ratio corresponding to the plurality of fine-constellation data components; and a transmission module to generate the transmission based at least on the plurality of transformed data components. Other embodiments are described and claimed. | 07-16-2009 |
20090197547 | SYSTEMS AND METHODS FOR AUTOMATICALLY CALIBRATING OUTPUT POWER OF A COMMUNICATION DEVICE - A method for automatically calibrating output power from a power amplifier of a communication device is provided. The method includes acquiring present output power values corresponding to preset current power calibration values by testing, and the theoretical values from calculation corresponding to the auto-power calibrate (APC) values not obtained from testing. Using the present output power and the theoretical values, the output power values from the power amplifier under different APC values can be further calibrated automatically. | 08-06-2009 |
20090197548 | METHOD FOR REGULATING THE TRANSMISSION POWER OF A TRANSMITTING STATION, AND TRANSMITTING STATION - For regulating a transmission power in a transmission channel of a transmission from a transmitting station in a transmission system, a transmit power command is received from a transmission receiving station, the transmission power in the transmission channel is changed on a basis of the received transmit power command, and an amount of the change in the transmission power at the transmitting station is determined by determining a ratio between a current transmission power and an average over time of the transmission power, such that the amount of the change is dependent on a value of the ratio, with the amount of change increasing as the value of the ratio increases. | 08-06-2009 |
20090215413 | APPARATUS AND METHOD FOR POWER TRANSMITTER IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for an Envelope Elimination and Restoration (EER) power transmitter are provided. The apparatus includes a signal separator for splitting a transmit signal to an amplitude component and a phase component, an orthogonal modulator for modulating the phase component into a Radio Frequency (RF) signal, a bias modulator for linearly amplifying the amplitude component, for determining a bias voltage according to a magnitude of the amplitude component, and for providing a current generated using the determined bias voltage to a high-efficiency power amplifier and the high-efficiency power amplifier for amplifying the RF signal using the linearly amplified amplitude component as a drain bias voltage and using the generated current as a drain bias current. | 08-27-2009 |
20090258616 | MULTISYSTEM WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus capable of being communicated by employing communication systems is provided with: communication units containing a system-A communication unit for performing a communication operation by a wireless signal using a GSM communication system, and a system-B communication unit for performing a communication operation by an wireless signal using a UMTS communication system; a power supply voltage detecting unit for detecting a voltage of a power supply applied to the communication units in a predetermined time period; and a power supply control unit operated in such a control manner that when the power supply voltage is lower than, or equal to the final voltage of the GSM communication system, the communication operation by the system-A communication unit is stopped, whereas the power supply voltage is higher than the final voltage of the UMTS communication system, the communication operation by the system-B communication unit is continuously carried out. | 10-15-2009 |
20090258617 | POWER COMBINER, AMPLIFIER, AND TRANSMITTER - This power combiner includes a first balun and a second balun. The first balun includes: a first line having a grounded end and an end connected to a positive input of a first differential input signal; a second line having a grounded end and an end connected to a negative input of the first differential input signal; a third line formed in parallel with the first line, the third line having an opened end corresponding to the grounded end of the first line and an end being different from the opened end; and a fourth line formed in parallel with the second line, the fourth line having a single-ended output end corresponding to the grounded end of the second line and an end connected to the end being different from the opened end of the third line. The second balun includes: a fifth line having a grounded end and an end connected to a positive input of a second differential input signal; a sixth line having a grounded end and an end connected to a negative input of the second differential input signal; a seventh line formed in parallel with the fifth line, the seventh line having an opened end corresponding to the grounded end of the fifth line and an end different from the opened end of the seventh line; and an eighth line formed in parallel with the sixth line, the eighth line having a single-ended output end corresponding to the grounded end of the sixth line and an end connected to the end different from the opened end of the seventh line. | 10-15-2009 |
20090270056 | MODULATION SYSTEM AND METHOD FOR SWITCHED AMPLIFIERS - A power amplifier includes a baseband modulator configured to receive a baseband amplitude component and generate a baseband modulated pulse string, an oscillator configured to receive a baseband phase component and generate phase modulated complex carrier signals, a complex up-converter configured to receive and mix the baseband modulated pulse string with the phase modulated complex carrier signals into mixed product signals, and two or more switched mode power amplifiers coupled to the complex up-converter, configured to amplify and switch the mixed product signals at the carrier frequency. The power amplifier further comprises complex filters individually coupled to one of the switch mode power amplifiers, configured to suppress image components in the amplified and switched mixed product signals, and a power combiner coupled to the two or more complex filters, configured to combine the real component of the complex filtered and amplified mixed product signals to generate an RF transmission signal. | 10-29-2009 |
20090270057 | BIAS CIRCUIT FOR A RADIO FREQUENCY POWER-AMPLIFIER AND METHOD THEREFOR - A wireless communication unit comprises a transmitter having a power amplifier biased by a bias circuit and a controller operably coupled to the bias circuit for setting one or more bias levels of the power amplifier. The bias circuit is a single bias circuit and is configured to provide either a current mode bias control of the power amplifier or a voltage mode bias control of the power amplifier in response to a control signal from the controller. In this manner, a single bias control circuit can be used to support applications that benefit from both current mode bias control and voltage mode bias control of the power amplifier. | 10-29-2009 |
20090275297 | NON-RECIPROCAL COMPONENT AND METHOD FOR MAKING AND USING THE COMPONENT IN A MOBILE TERMINAL - The invention relates to a non-reciprocal component comprising: a ferrite substrate having a first side and an opposing second side located on a ground layer, a first metal line and a second metal line are located on the ferrite substrate in parallel to each other. To provide a non-reciprocal component having small dimensions and which could be integrated. The ferrite substrate is magnetized parallel to the metal lines and each of the metal lines is running at least from one side of the ferrite substrate to the other side and back forming thereby at least one meander loop, wherein the loops are interlaced to each other and the metal lines are isolated in an area of the loop. | 11-05-2009 |
20090286496 | SELF CALIBRATION OF DOWNLINK TRANSMIT POWER - Transmit power (e.g., maximum transmit power) may be defined based on the maximum received signal strength allowed by a receiver and a total received signal strength from transmitting nodes at the receiver. Transmit power may be defined for an access node (e.g., a femto node) such that a corresponding outage created in a cell (e.g., a macro cell) is limited while still providing an acceptable level of coverage for access terminals associated with the access node. An access node may autonomously adjust its transmit power based on channel measurement and a defined coverage hole to mitigate interference and perform a self-calibration process. | 11-19-2009 |
20090298447 | APPARATUS AND METHOD FOR CONTROLLING TRANSMIT POWER IN HUMAN BODY COMMUNICATION SYSTEM - An apparatus and method for controlling Transmit (Tx) power when a portable terminal performs human body communication with a counterpart portable device are provided. The apparatus includes a voltage manager for determining whether the Tx power needs to be changed based on an output voltage that is based on a current that varies according to a distance between an electrode of a portable terminal and an electrode of a counterpart portable terminal, and changes the Tx power according to a result of the determination. | 12-03-2009 |
20090318099 | Peak Suppressing Apparatus, Peak Suppressing Method, and Wireless Communication Device - A peak suppressing apparatus includes an amplitude limiter that limits amplitude of the transmission signal with a predetermined threshold; a peak-suppressing-signal extracting unit that extracts a peak suppressing signal by subtracting the transmission signal before the amplitude limiting from the transmission signal amplitude-limited by the amplitude limiter; a filtering unit that performs filtering so that a frequency characteristic of the peak suppressing signal extracted by the peak-suppressing-signal extracting unit becomes flat; and an adder that adds the peak suppressing signal filtered by the filtering unit to the transmission signal. | 12-24-2009 |
20090318100 | Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses - A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second non-linear phase responses. The first non-linear phase response is based on a first bias applied to the first PAD, and the second non-linear phase response is based on a second bias applied to the second PAD. The first and second PADs are coupled in parallel to provide a combined substantially linear phase response. According to an embodiment, the first and second PADs have respective first and second average input capacitances. Signal swings about the first and second biases vary the respective first and second average input capacitances, which may be combined to provide a combined average input capacitance that is substantially insensitive to the signal swings about the first and second biases. | 12-24-2009 |
20100009642 | POWER CONTROL SYSTEM FOR A WIRELESS COMMUNICATION UNIT - A wireless communication unit comprises a transmitter having an analogue feedback power control loop with an input and a power amplifier having a power amplifier output, where the analogue feedback power control loop is arranged to feedback a signal to the input to set an output power level of the transmitter. The wireless communication unit further comprises an outer digital loop operably coupled from the power amplifier output to the transmitter. | 01-14-2010 |
20100029227 | MULTI-MODE CONFIGURABLE TRANSMITTER CIRCUIT - Method and apparatus for configuring a transmitter circuit to support multiple modes and/or frequency bands. In an embodiment, a pre-driver amplifier (pDA) in a transmit (TX) signal path is selectively bypassed by a controllable switch. The switch can be controlled based on a mode of operation of the transmitter circuit. Further techniques are disclosed for selectively coupling the output of a driver amplifier (DA) to at least one of a plurality of off-chip connections, each connection coupling the DA output to a set of off-chip components. | 02-04-2010 |
20100029228 | EDGE POWER RAMP USING LOGARITHMIC RESISTOR ATTENUATOR - A power ramping circuit for use in the transmit path of a radio frequency (RF) circuit. The power ramping circuit includes parallel connected transistors used as logarithmic resistor attenuators for adjusting current to a mixer circuit in the transmit path. The parallel connected transistors can be sized differently, and are sequentially turned off to gradually increase the current provided to the mixer circuit. A ramp control circuit controls the parallel connected transistors in response to either an analog signal or a digital signal. | 02-04-2010 |
20100041354 | Method and apparatus for controling output power of communication equipment - Communication equipment includes a circuit generating an RF input signal; a PA receiving a supply voltage, receiving the RF input signal, and providing an amplified version of the RF input signal as an output signal that is associated with an output power of the communication equipment; and an output circuit that includes an antenna for transmitting the output signal. The communication equipment also includes: a voltage detector circuit including sensing circuitry for sensing the supply voltage and a comparator for comparing the supply voltage to a first voltage threshold and generating a control signal when the supply voltage exceeds the first voltage threshold; and a disabling circuit coupled to the voltage detection circuit for disabling a portion of the communication equipment in response to the control signal to maintain output power of the communication equipment below a maximum output power level. | 02-18-2010 |
20100056085 | Bias Network - An HF-line includes parallel branches with bias terminals, to which a direct voltage source is respectively connected via a first inductor and a second inductor. The inductors are inductively coupled to one another. | 03-04-2010 |
20100069024 | BASEBAND SIGNAL INPUT CURRENT SPLITTER - A current steering mechanism is provided in a radio transmitter (e.g., a multiband radio transmitter) to provide compatibility with a variety of baseband parts. Different proportions of an input signal current (“in”) are steered to a dummy load, a mixer for a first band, and at least one other mixer for a second band. The mechanism is structured to selectively apportion a current input signal between multiple paths of the same polarity having respective load circuits and concurrently steer different proportions of the current input signal to a dummy load path and at least one mixer path. | 03-18-2010 |
20100081400 | Radio transmitter - A radio transmitter includes a radio module, a battery from which power is fed to the radio module, and a metal plate. The radio module includes a transmission module generating a transmission signal and an antenna configured to wirelessly transmit the transmission signal. The metal plate is located so as to cover a part of the battery and a part of the antenna. The battery is electromagnetically coupled to the antenna. A main radiation direction of the antenna is parallel to a principal surface of the metal plate. | 04-01-2010 |
20100087157 | Radio transmitter - A radio transmitter includes a radio module alternately repeating a communication mode in which power is consumed to wirelessly transmit predetermined information and a standby mode in which standby power is consumed with no radio transmission performed, and a power supply section supplying power to the radio module. The power supply section includes a secondary battery storing power, a solar battery converting light energy into power, and a charging circuit controlling power supply from the solar battery to the secondary battery and power supply from the secondary battery to the radio module. The charging circuit feeds power from the solar battery to the secondary battery during a period of the standby mode. | 04-08-2010 |
20100112966 | METHOD AND DEVICE FOR CONTROLLING POWER AMPLIFICATION - A method and an NE for controlling power amplification are provided. The method for controlling power amplification includes: outputting a voltage signal according to the state of an NE; applying the voltage signal to a grid electrode or a base electrode of at least one power amplifier transistor in a power amplifier. Thus, static power dissipation of the power amplifier can be eliminated when no RF power is output, and the efficiency of the power amplifier can be improved by using the above method and NE. | 05-06-2010 |
20100120385 | RADIO FREQUENCY AMPLIFICATION CIRCUIT UTILIZING VARIABLE VOLTAGE GENERATOR - Embodiments of apparatuses, methods, and systems for a radio frequency amplification circuit utilizing a variable voltage generator are generally described herein. Other embodiments may be described and claimed. | 05-13-2010 |
20100136934 | VOICE, DATA AND RF INTEGRATED CIRCUIT WITH MULTIPLE MODULATION MODES AND METHODS FOR USE THEREWITH - A radio frequency (RF) transmitter includes a modulation controller that generates a modulation control signal having either a first value or a second value. A driver generates an RF signal based on an upconverted signal, wherein the driver modulates the upconverted signal based on a first modulation signal when the modulation control signal has the first value. A power amplifier generates a transmit signal based on the RF signal, wherein the power amplifier modulates the RF signal based on a second modulation signal when the modulation control signal has the second value. | 06-03-2010 |
20100151803 | MULTI-CARRIER TRANSMISSION DEVICE - A multi-carrier transmission device improves peak suppression efficiency in a multi-carrier signal. The multi-carrier transmission device ( | 06-17-2010 |
20100151804 | TRANSMITTING DEVICE, TRANSMIT POWER CONTROL METHOD AND CONTROL DEVICE THEREOF IN MICROWAVE SYSTEM - A transmitting device, a transmit power control method and a control device thereof in a microwave system are provided. The transmitting device includes a transmit power control module, adapted to acquire a switching event of a modulation mode of the microwave system, and adjust a transmit power of a radio frequency transmitting module according to the switching event and a preset power control mode; and the radio frequency transmitting module, adapted to send a microwave signal to a communication peer end by adopting the transmit power adjusted by the transmit power control module. Through setting the power control module, the gain of an AM microwave system is enhanced, and the service impairment caused by the AM microwave system when actuating an ATPC function is avoided. Correspondingly, a transmit power control method in a microwave system is also provided, which enables to switch to a low modulation mode as quickly as possible without causing the service impairment when the signal is deteriorated and enhances the system gain when the signal quality is improved. | 06-17-2010 |
20100159857 | ENHANCING ANTENNA PERFORMANCE IN RF DEVICES - Method and apparatus for improving RF signal performance of a battery-operated handheld device includes RF isolating the battery from DC-powered circuitry and actively incorporating the battery in RF signal transfers with respect to an RF antenna. | 06-24-2010 |
20100173597 | METHOD AND SYSTEM FOR LEVEL DETECTOR CALIBRATION FOR ACCURATE TRANSMIT POWER CONTROL - Methods and systems for level detector calibration are disclosed and may comprise calibrating a level detector integrated on-chip to eliminate an associated zero input offset voltage utilizing a replica bias circuit with no input ac voltage at the level detector or the replica bias circuit. The offset voltages of the level detector and the replica bias circuit may be combined to eliminate the associated zero input offset voltage of the level detector. The output signal may be generated by a difference of output signals from the level detector and the replica bias circuit. The level detector and the replica bias circuit may be biased utilizing a similar bias voltage. A plurality of known input voltages may be utilized to generate a corresponding plurality of output voltages of the level detector, generating a corrected transfer function that may be used to accurately set a transmitter power level. | 07-08-2010 |
20100178886 | METHODS AND APPARATUS FOR TUNING AND CONTROLLING OUTPUT POWER IN POLAR TRANSMITTERS - A power tuning method determines values of a magnitude control signal that controls the magnitude of an amplitude-modulated power supply signal applied to a power supply port of a power amplifier of a polar transmitter and an amplitude control signal that controls the amplitude of a constant-envelope phase-modulated signal applied to a radio frequency input port of the power amplifier necessary to set the output power of the polar transmitter to a target output power. The method is repeated and performed for a plurality of different target output powers. Output-power-level dependent power control parameters calculated from the applied method are used to set the values of the magnitude control and amplitude control signals during normal operation. Using the output-power-level dependent power control parameters, the magnitude control and amplitude control signals are changed in a continuous manner with changes in output power and over the full dynamic range of output powers the polar transmitter can be commanded to operate, thereby obviating any need for a closed-loop power detection mechanism to correct for power discontinuities. | 07-15-2010 |
20100184393 | MIMO TRANSMITTER - A MIMO transmitter capable of highly efficient power amplification over a wide dynamic range or for a high PAPR signal. In the MIMO transmitter ( | 07-22-2010 |
20100203854 | Method and Apparatus For Transmitting a Signal Within a Predetermined Spectral Mask - The present patent application comprises a transmitting method and apparatus | 08-12-2010 |
20100222016 | WIRELESS COMMUNICATION DEVICE - A wireless communication device including an amplifying unit amplifying a transmission signal, a transmission unit configured to transmit the transmission signal amplified through the amplifying unit, a regulating unit configured to regulate a load of the amplifying unit, and a control unit configured to control the regulating unit so that the regulating unit regulates the load of the amplifying unit to attain a load impedance determined based on, a) a power ratio of the transmitted transmission signal to a reflected signal reflected from the transmission unit, and b) at least one of a value of a current passing through the amplifying unit and a gain of the amplifying unit. | 09-02-2010 |
20100222017 | RADIATED POWER CONTROL FOR A MULTI-ANTENNA TRANSMISSION - To meet a radiated power limit, a transmitting station determines a synthesized antenna pattern based on steering vectors used for spatial processing and estimates an array gain based on the synthesized antenna pattern. Different spatial processing modes (e.g., eigensteering and spatial spreading) result in different synthesized antenna patterns. The array gain may be estimated based on the spatial processing mode used for the data transmission and applicable parameters (e.g., eigenvalues) for that mode. An element gain for each antenna used for data transmission may also be estimated. The transmitting station then limits the transmit power for the data transmission based on the array gain, the element gain, and the radiated power limit, which may be an effective isotropic radiated power (EIRP) limit imposed by a regulatory agency. | 09-02-2010 |
20100227575 | METHOD AND SYSTEM FOR POWER CONTROL WITH OPTIMUM POWER EFFICIENCY WITH A MULTI-PORT DISTRIBUTED ANTENNA - Methods and systems for power control with optimum power efficiency with a multi-port distributed antenna are disclosed and may include selectively enabling one or more power amplifiers (PAs) coupled to the antenna. The selective enabling may be based on a desired output power radiated from the antenna, and the PAs may be coupled to ports on the antenna based on an output impedance of the PAs and a characteristic impedance of the ports. Each of the PAs may be configured for maximum efficiency in different power ranges. The power ranges may be inversely proportional to the output impedance of the PAs. The output power may be monitored utilizing a power detector, such as an envelope detector, coupled to the antenna. The antenna may be integrated on a chip with the one or more PAs or may be located external to the chip. The antenna may include a microstrip antenna. | 09-09-2010 |
20100227576 | CONTROLLING A VOLTAGE REGULATOR - A wireless system includes a radio and a voltage regulator, which provides a supply voltage to the radio. The voltage regulator includes a storage element, at least one switch that is coupled to the storage element and a controller. The controller operates the voltage regulator in a continuous mode of operation, operates the voltage regulator in a discontinuous mode of operation in response to an output current of the voltage regulator decreasing below a predetermined threshold; operates the switch(es) to energize the storage element in response to a detection of whether an output voltage is below a threshold level; operates the switch(es) to halt the energization of the storage element in response to detecting a current in the storage element reaching a predetermined current threshold; operates the switch(es) to energize and de-energize the storage element in the discontinuous mode of operation; and operates the switch(es) to energize the storage element in synchronization with a periodic clock signal. | 09-09-2010 |
20100233977 | MULTI-MODE RADIO TRANSMITTERS AND A METHOD OF THEIR OPERATION - A multi-mode radio transmitter for use in mobile radio cellular standards, such as 2G, 2.5G and 3G, and a method of operating the transmitter in which an input signal is modulated independently of controlling the drive of a power amplifier (PA) module ( | 09-16-2010 |
20100240331 | POWER AMPLIFYING CIRCUIT, AND TRANSMITTER AND WIRELESS COMMUNICATION DEVICE USING THE SAME - To provide a power amplifier circuit which is capable of reducing a phase error of an output signal in a case where an amplitude of an input signal is relatively small, as well as a transmitter and a wireless communication device using the same. A constant envelope signal generation circuit ( | 09-23-2010 |
20100240332 | POWER AMPLIFIER CIRCUIT, AND TRANSMITTER AND WIRELESS COMMUNICATION DEVICE USING THE SAME - To provide a power amplifier circuit, which is capable of amplifying a signal having envelope variation with high power added efficiency, and exhibits low power consumption and high versatility, as well as to provide a transmitter and a wireless communication device using the power amplifier circuit, the power amplifier circuit includes: a constant envelope signal generation circuit ( | 09-23-2010 |
20100248661 | Activatable data transmitter system - A method of combining three types of technologies: wireless communication, a stand alone independent activatable power source and one or more sensors or detectors to form an Activatable Data Transmitter device (ADT) that can capture and transmit environmental data proximal to the ADT. In any specific application or use the sensor type and power component would be coupled or integrated with a wireless transmitter. Multiple and various ADT types would be employed in spaces or places where no battery or wired power source exists, access is difficult or impossible, use of wired power or wired signal or both would be expensive or impossible or some combination thereof. As part of the invention the ADTs would forward the sensed data to a Receiver System either directly for use, processing and/or display or via a Data Repeater. | 09-30-2010 |
20100248662 | ALTITUDE-DEPENDENT POWER MANAGEMENT - The subject matter disclosed herein relates to changing at least one power state of a mobile station at least in part in response to information indicating a change in altitude from one or more sensors. | 09-30-2010 |
20100279634 | METHOD OF TRANSMITTING DATA BLOCK INFORMATION IN A CELLULAR RADIO SYSTEM - A method in a transmitter for transmitting a transport format indication from a transmitter to a receiver ( | 11-04-2010 |
20100285762 | METHOD OF TRANSMITTING REFERENCE SIGNAL IN MULTIPLE ANTENNA SYSTEM - A method of transmitting an uplink reference signal in a multiple antenna system is provided. A user equipment transmits a first sounding reference signal for uplink channel measurement on a first antenna by using at least one power amplifier among a plurality of power amplifiers, and transmits a second sounding reference signal for uplink channel measurement on a second antenna by using the at least one power amplifier, wherein the first sounding reference signal and the second sounding reference signal are transmitted using different time regions when using one power amplifier, and the first sounding reference signal and the second sounding reference signal are transmitted using different time regions or different frequency regions when using the plurality of power amplifiers. | 11-11-2010 |
20100291887 | METHOD AND APPARATUS FOR IMPROVING POWER AMPLIFIER EFFICIENCY IN WIRELESS COMMUNICATION SYSTEMS HAVING HIGH PEAK TO AVERAGE POWER RATIOS - A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block. | 11-18-2010 |
20100297967 | MOBILE COMMUNICATION TERMINAL, AND METHOD AND PROGRAM FOR SWITCHING TRANSMISSION POWER - In order to transmit radio waves even when an external device is connected, a mobile phone includes an antenna; an FM transmitter which outputs signals for transmitting radio waves from the antenna; an earphone terminal | 11-25-2010 |
20100297968 | CIRCUITS AND METHODS FOR COMBINING SIGNAL POWER - The present disclosure includes techniques for combining signal power. In one embodiment, a plurality of power amplifiers generate amplified signals. A plurality of first transmission lines are electrically coupled outputs of the power amplifiers. Second transmission lines are magnetically coupled to the first transmission lines to receive the amplified signals. The amplified signals propagate down the second transmission lines to a central conductive region to a node. The amplified signals are added at the node. The node is coupled to an antenna terminal. | 11-25-2010 |
20100297969 | RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, RADIO TRANSMISSION METHOD, AND RADIO RECEPTION METHOD - A radio transmission device capable of improving the reception error rate characteristics of a receiver. In this device, an FFT (Fast Fourier Transform) unit ( | 11-25-2010 |
20100311364 | METHOD AND SYSTEM FOR CONTROLLING POWER FOR A POWER AMPLIFIER UTILIZING A LEAKY WAVE ANTENNA - Methods and systems for controlling power for a power amplifier utilizing a leaky wave antenna (LWA) are disclosed and may include configuring one or more power amplifiers (PAs) in a wireless device at a desired output power level. The PAs may be coupled to feed points on the LWAs that may exhibit an input impedance corresponding to an output impedance of the PAs. RF signals may be transmitted utilizing the LWAs. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. The LWAs may be configured to transmit the RF signals in a desired direction. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The input impedances of the feed points may be dependent on a position of the feed points in the cavities. | 12-09-2010 |
20100311365 | Power Amplifier Controller With Polar Transmitter - A power amplifier controller controls a power amplifier and is coupled to a polar modulator. The polar modulator generates an amplitude component and a phase-modulated component of the desired RF modulated signal, and outputs to the power amplifier controller. The power amplifier controller regenerates a combined phase and amplitude modulated RF signal to generate an input signal to a power amplifier by adjusting the gain of a VGA based on the amplitude component of the desired RF modulated signal. Concurrently, the power amplifier controller both controls an adjusted supply voltage to the PA and adjusts the gain of the VGA based upon an amplitude correction signal or amplitude error signal. | 12-09-2010 |
20100317301 | METHODS FOR HANDLING A TRANSMITTING PROCESS AND COMMUNICATION APPARATUSES UTILIZING THE SAME - A communication apparatus is provided. A power amplifier is coupled to an antenna and switched on or off according to a control signal. A baseband processing module is coupled to the power amplifier and a radio transceiver module, receives a bit stream comprising information indicating corresponding transmitting time and sub-carrier frequencies of up-link messages via the radio transceiver module, processes the bit stream to obtain a map profiling allocations of the up-link messages, prepares the up-link messages to be transmitted according to the map, and generates the control signal according to the map. Within a data frame period, when there is no up-link message to be transmitted during a up-link time interval, the power amplifier is switched off in response to the control signal during the up-link time interval. | 12-16-2010 |
20100317302 | SYSTEM AND METHOD FOR CONTROLLING RF EXPLOSURE LEVELS - An apparatus comprises a radio frequency (RF) signal source; and a controller configured to adjust power of the RF signal source based on a detected parameter. In one embodiment, the apparatus further comprises a proximity sensor configured to determine proximity of the RF signal source to live tissue, and the detected parameter is the proximity determined by the proximity sensor. The RF signal source may be an RF antenna. The controller may be configured to reduce the power of the RF signal source when the proximity is less than a predetermined threshold value. The controller may be configured to reduce the power to a predetermined reduced power level. | 12-16-2010 |
20100323644 | POWER GENERATION DEVICE WITH TWO MOBILE PARTS - A power generation device that includes an excitation coil with a central opening, and a magnetic circuit extending through the central opening of the coil and including at least one permanent magnet and a plurality of ferromagnetic members arranged in a fixed portion and two mobile portions. The two mobile portions are mounted on two parallel rotary axes and can each assume two positions. The device further includes a mechanism rotating the two mobile portions between the two positions thereof so as to create two states of the magnetic circuit, i.e. a first state in which a magnetic flow flows through the coil in one direction and a second state in which a magnetic flow flows through the coil in the opposite direction. | 12-23-2010 |
20100323645 | PHASE SHIFTER AND METHOD FOR CONTROLLING SAME, AND RADIO COMMUNICATION DEVICE WITH ARRAY ANTENNA - Without influenced by a symbol rate of a baseband signal, a power consumption is kept low approximately to zero in a phase shifter. | 12-23-2010 |
20100330938 | POWER DETECTOR - A power detector comprises a pair of transistor amplifier elements having respective control terminals for receiving with opposite polarities a radio/mm-wave frequency signal whose power is to be detected. Respective alternately-conductive parallel amplifier paths are controlled by the control terminals. A low pass filter and current mirror is responsive to the combined currents flowing in the parallel amplifier paths for producing a low pass filtered signal. A detector output stage is responsive to the low pass filtered signal. Each of the pair of amplifier elements includes a respective impedance through which flows current from the respective amplifier path and current from the respective control terminal. | 12-30-2010 |
20110003566 | RADIO FREQUENCY POWER AMPLIFIER - An RF power amplifier according to the present invention includes: an RF power amplifying element, a first switch provided in a first transmission path for transmitting a first RF signal output from the RF power amplifying element, a second transmission unit which transmits a second RF signal of higher frequency than the first RF signal output from the RF power amplifying element, and a second second-order harmonic trap circuit connected to an output terminal, and the second transmission unit includes a grounded capacitor, a second transmission path, a Band-I matching circuit, a second switch connected in series to the second transmission path, and the second switch connects the second transmission path to the grounded capacitor when the first RF signal is amplified, and connects the second transmission path to the Band-I matching circuit when the second RF signal is amplified. | 01-06-2011 |
20110003567 | METHOD OF EFFICIENT POWER BOOSTING - An efficient power boosting method is provided. In the method, a first resource element for boosting power, a second resource element for achieving synchronization with a specific channel, and a third resource element for transmitting data are allocated to a predetermined resource region. Then, power of at least one of the second resource element and the third resource element is boosted using power allocated to the first resource element and information is transmitted using the predetermined resource region. | 01-06-2011 |
20110028110 | RECONFIGURABLE HYBRID ANTENA DEVICE - The present invention relates to a reconfigurable hybrid antenna device. According to the present invention, the reconfigurable hybrid antenna device includes a reflective plate that reflects an incident signal and a reconfigurable power supply arrangement that includes one or more element antennas for supplying power to the reflective plate. The reconfigurable power supply arrangement has characteristics of electrical reconfiguration and physical reconfiguration of the element antennas, and reconfiguration of changing a range of radiation of signal powers radiated from the element antennas. With these characteristics of reconfiguration, it is possible to simultaneously or independently provide a plurality of mobile communication services physically using one antenna, such that it is possible to have an economical base station antenna and considerably reduce the number of temporary base stations, thereby reducing the maintenance cost of base stations. | 02-03-2011 |
20110034137 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND RADIO FREQUENCY MODULE - The present invention provides a semiconductor integrated circuit device and a radio frequency module realizing reduction in high-order harmonic distortion or IMD. For example, a so-called antenna switch having a plurality of transistors between an antenna terminal and a plurality of signal terminals is provided with a voltage supply circuit. The voltage supply circuit is a circuit for supplying voltage from a voltage supply terminal to at least two signal terminals in the plurality of signal terminals via resistive elements. With the configuration, antenna voltage dropped due to a leakage or the like can be boosted and, for example, transistors in an off state can be set to a deep off state. | 02-10-2011 |
20110045789 | Method and Device for Optimizing Mobile Radio Transmitter/Receiver having Antenna - A method is provided, comprising transmitting a radio transmission using a radio transmitter circuit connected to a corresponding antenna of a mobile electronic device, detecting a change in transmission conditions, and adjusting the power radiated by said antenna in response to a detected change. A mobile electronic device is provided, comprising a radio transmitter circuit, an antenna connected to said radio transmitter circuit, and a controller adapted for transmitting a radio transmission using said radio transmitter circuit, detecting a change in transmission conditions, and adjusting the power radiated by said antenna in response to a detected change. | 02-24-2011 |
20110053531 | TRANSMISSION DEVICE AND TRANSMISSION METHOD - A disclosed transmission device includes a voltage control signal generating unit configured to generate a first voltage control signal from a transmission signal, an amplifier configured to amplify the transmission signal in response to the first voltage control signal, a first timing adjusting unit configured to adjust a control timing for the first voltage control signal, and a control timing setting unit configured to set the control timing adjusted by the first timing adjusting unit based on the output signal from the amplifier and the transmission signal. | 03-03-2011 |
20110053532 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - A radio communication device includes a power amplifier to amplify a transmit signal, a control unit to generate a voltage control signal for defining power to be supplied to the power amplifier in accordance with a conversion curve expressed using a polynomial series based on an envelope signal obtained from the transmit signal and determine the polynomial series based on an efficiency of the power amplifier, and a power source unit to supply the power to the power amplifier based on the voltage control signal, wherein the control unit divides an amplitude range of the envelope signal on the conversion curve into a plurality of sections and determines the polynomial series based on at least one of the plurality of sections. | 03-03-2011 |
20110053533 | METHOD AND APPARATUS FOR OPTIMIZING TRANSMITTER POWER EFFICIENCY - A peak to average power ratio signal is generated from a first mapping function that selects the peak to average power ratio signal that corresponds to the data rate or data format of the signal to be transmitted. The selected peak to average power ratio signal is summed with a desired average transmit power signal. The resulting summation signal is input to a second effectively continuously valued mapping function comprising a table that has a plurality of power amplifier control signal values each with a corresponding peak transmit power. Each peak transmit power signal value results in a power amplifier control signal value that achieves the best possible transmitter power efficiency while still meeting out of band spurious emissions and waveform quality requirements. The summation signal value maps to one of the power amplifier control signal value that is then used to adjust a parameter such as bias of the power amplifier. | 03-03-2011 |
20110059707 | BIAS MODULATION APPARATUS, AND APPARATUS AND METHOD FOR TRANSMITTING SIGNAL FOR WIDEBAND MOBILE COMMUNICATION USING THE SAME - In a wideband mobile communication system, a signal transmitting apparatus separates an envelope curve signal which is size information and a phase signal which is phase information from a signal to transmit, and compares the envelope curve signal with a predetermined voltage. The signal transmitting apparatus performs active bias control that amplifies and outputs an envelope curve signal according to different driving voltages based on a comparison result, and supplies a bias voltage to a power amplifier that amplifies a phase signal based on the amplified signal. | 03-10-2011 |
20110065398 | UNIVERSAL DEMODULATION AND MODULATION FOR DATA COMMUNICATION IN WIRELESS POWER TRANSFER - The present invention provides a universal demodulation circuit, a load modulation circuit and associated method, and an associated power transfer system, all suitable for use in wireless power transfer. A power receiver with signal strength detection is also provided. Modulation of the impedance of the demodulation circuit is determinable by detecting the amplitudes of a first and a second electrical parameter, thereby demodulating data communicated by modulation of the impedance of the demodulation circuit. The modulation circuit has a communication modulator to modulate the impedance of the modulation circuit, to a predetermined minimum modulation depth, thereby to communicate data. | 03-17-2011 |
20110065399 | SYSTEM AND METHOD FOR DYNAMICALLY REGULATING VOLTAGE TO MINIMIZE POWER CONSUMPTION - A system includes a voltage regulator connected to a voltage source for providing a regulated voltage at a first level in a first mode of operation and at least one second level in a second mode of operation. The second voltage level is higher than the first voltage level. A control processor provides control signals to select between the first and the second modes of operation. A component associated with the voltage regulator. The component is disabled in the first mode of operation and enabled in the second mode of operation. The control processor generates control signals to configure the voltage regulator to generate the voltage at the first level in the first mode of operation when the component is disabled and to configure the voltage regulator to generate the voltage at the at least one second level in the second mode of operation when the component is enabled. | 03-17-2011 |
20110070847 | Transmitting a Radio Signal in a Mobile Communication Network - System and method for transmitting a radio signal in a mobile communication network. The radio signal has a circular polarisation. | 03-24-2011 |
20110105059 | UPLINK POWER CONTROL FOR WIRELESS COMMUNICATION - Certain aspects of the present disclosure provide closed loop and open loop power control techniques for each antenna of the user equipment (UE). The access point may measure the received signals from each antenna of the user equipment, calculate a power adjustment parameter for each antenna of the UE, and transmit the parameters to the UE. The UE may use the adjustment parameters to determine the transmit power value for each antenna. In addition, the UE may measure the path loss for each antenna and update the transmit power per antenna based on the path loss and other parameters. | 05-05-2011 |
20110105060 | Radio frequency transmitter and signal amplification method therefor - A Radio Frequency (RF) transmitter and a signal amplification method therefor are provided, in which a signal source generates a signal of a predetermined Intermediate Frequency (IF) band, a local oscillator generates a signal of a predetermined high frequency band as a carrier signal, a power amplifier amplifies the signal received from the local oscillator to a predetermined transmission level, and a parametric mixer module receives the signals from the signal source and the power amplifier and outputs the received signals as a radio signal for transmission. The signal output from the parametric mixer module is transmitted as the radio signal without additional amplification. | 05-05-2011 |
20110111711 | High Efficiency Linear Transmitter - A highly efficient linear transmitter uses a control module to compare an input signal with a threshold. The transmitter includes one or more power amplifiers ( | 05-12-2011 |
20110124304 | TRANSMISSION APPARATUS AND ADJUSTMENT VALUE MEASUREMENT METHOD - A transmission apparatus performs distortion compensation on a power amplifier using a distortion compensator that includes an adaptive equalizer. The transmission apparatus includes a filter coefficient storage unit that stores filter coefficients that are each set in a digital filter of the adaptive equalizer; a filter coefficient setting unit that selects a filter coefficient from the filter coefficient storage unit according to a feedback signal from the power amplifier; an adjustment value storage unit that stores adjustment values in association with transmission frequencies, the adjustment values each being used by the filter coefficient setting unit to select the filter coefficient; and an initial value setting unit that reads an adjustment value corresponding to a transmission frequency, which is set in the transmission apparatus, from the adjustment value storage unit and sets the read adjustment value as an initial value of the adjustment value used for selecting the filter coefficient. | 05-26-2011 |
20110130103 | OSCILLATION FREQUENCY CONTROL CIRCUIT, AND DC-DC CONVERTER AND SEMICONDUCTOR DEVICE HAVING THE SAME - An oscillation frequency control circuit configured to control a frequency of a second clock signal of an oscillation circuit generating and outputting the second clock signal having a frequency in response to an input control signal is disclosed. The oscillation frequency control circuit includes a frequency difference detection circuit unit configured to detect a difference between a frequency of a predetermined first clock signal input externally and the frequency of the second clock signal, and generate and output a signal indicating a result of the detection; and a frequency control circuit unit configured to control the frequency of the second clock signal so that the frequency of the second clock signal continually changes back and forth between a predetermined lower limit value and a predetermined upper limit value in response to the output signal from the frequency difference detection circuit. | 06-02-2011 |
20110130104 | VSWR COMPENSATION CIRCUITS FOR RF TRANSMIT CHAIN - The present invention provides a method and apparatus for compensating the output of a transmitter stage ( | 06-02-2011 |
20110136450 | POWER CIRCUIT AND RADIO COMMUNICATION CIRCUIT USING SAME AND METHOD OF OPERATING A CIRCUIT - A power circuit and method thereof are provided. The power circuit includes an output circuit having an alternating current-coupling element and that supplies an output signal of the output circuit to an amplifier as a driving voltage. The power circuit includes an envelope signal-extracting unit extracting an envelope signal from a carrier wave, a simulation signal-waveform generating unit generating a simulation signal including a fluctuation component occurring when the envelope signal is transmitted to the output circuit, a fluctuation component-extracting unit extracting the fluctuation component included in the simulation signal, and an inverted component-generating unit generating an inverted component obtained by performing phase inversion for the fluctuation component, where the fluctuation component occurring in the output circuit is canceled out through the inverted component. | 06-09-2011 |
20110136451 | TELECOMMUNICATION DEVICE HAVING A LOOP-SUPPLIED DEVICE AND METHOD FOR THE OPERATING VOLTAGE SUPPLY THEREOF - A telecommunication device has a power-supplying receiving device, and a transmitter device supplied by the receiving device via a current loop for the output of at least one variable measurement value. The measurement value is imprinted on the loop current. The telecommunication device also includes an additional appliance supplied from the current loop. The additional appliance includes a control device for adaptively adjusting its operating voltage relative to the loop current as a function of the current power requirement. The control device reduces the operating voltage up to a minimum operating voltage value upon increasing loop current in a reversed proportional manner to the loop current, and keeps the operating voltage constant in case of a further increase of the loop current in a loop current independent manner. | 06-09-2011 |
20110136452 | WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUIT AND METHOD OF POWER CONTROL OF A POWER AMPLIFIER THEREFOR - A wireless communication unit comprising a transmitter having a power amplifier, a controller logic module arranged to control a power control value of the power amplifier and a closed loop control system operably coupled to the power amplifier and arranged to monitor a level of peak PA compression, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression. | 06-09-2011 |
20110143699 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting data in a wireless communication system are disclosed, which transmit uplink data in consideration of mobile station (MS) consumption power such that a UE can be stably operated at a cell edge. A method for transmitting data by a mobile station (MS) of a wireless communication system includes transmitting, if MS power consumption is higher than limitation of power consumption, data to a base station (BS) with power higher than the limitation of power consumption using power supplied from a primary power-supply unit and a storage unit during a first time, and charging the storage unit using the primary power-supply unit during a second time, wherein the limitation of power consumption indicates maximum power amount capable of being normally supplied from the primary power-supply unit. | 06-16-2011 |
20110189966 | Power Amplifier Controller Circuit - A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller circuit comprises an amplitude control loop and a phase control loop. The amplitude control loop adjusts the supply voltage to the power amplifier based upon the amplitude correction signal. The amplitude correction signal may also be split into two or more signals with different frequency ranges and provided respectively to different types of power supplies with different efficiencies to generate the adjusted supply voltage to the power amplifier. The phase control loop adjusts the phase of the input signal based upon a phase error signal indicating a phase difference between phases of the input signal and the output signal to reduce phase distortion generated by the power amplifier. | 08-04-2011 |
20110195681 | TRANSMISSION APPARATUS - A method of amplifying signals for transmission includes generating a signal in each of a plurality of subsystems. The subsystems each implement one of a plurality of radio access networks such that at least two different radio access networks are implemented. The method further includes amplifying signals generated by the subsystems with a power amplifier capable of amplifying input signals to a maximum power. The method also includes generating in each subsystem a power demand indicative of a power requested by that subsystem. Additionally, the method includes assigning a portion of the maximum power to each subsystem based upon the demands. | 08-11-2011 |
20110207420 | NARROW BAND RF FILTER CIRCUITS, DEVICES AND PROCESSES USING IMPEDANCE TRANSLATION - An active filter circuit includes an inductance-capacitance (LC) circuit ( | 08-25-2011 |
20110207421 | Apparatus For Transmitting A Signal Below A Standard Transmit Power in A Network - A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be set to be less than the standard power in any of a variety of ways. For example, a center tap voltage of the transmitter may be reduced. In another example, a class of operation of the transmitter may be changed. In yet another example, the transmitter may include a current mirror having a plurality of diode-connected transistors coupled in parallel, thereby reducing the current at output terminals of the transmitter. Reducing the current at the output terminals decreases the output power of the transmitter, which may reduce the power consumed by the transmitter. | 08-25-2011 |
20110223875 | ELECTRONIC APPARATUS, TRANSMITTER, AMPLIFIER, AND AMPLIFIER CONTROL METHOD - An electronic apparatus having communications capabilities, including: an envelope detector that detects an envelope of a transmission signal; a differentiator that differentiates the envelope with respect to time to obtain differential components; a filtering processor that filters the differential components; an integrator that integrates the filtered differential components with respect to time to generate an envelope tracking signal; an amplifying unit that amplifies the transmission signal; and a voltage controller that controls, in accordance with the envelope tracking signal, a voltage the amplifying unit uses to amplify the transmission signal. | 09-15-2011 |
20110230149 | RF POWER AMPLIFIER DEVICE AND WIRELESS COMMUNICATION TERMINAL DEVICE - A RF power amplifying device is constituted by a system of a balanced amplifier including first phase shifters, a first RF power amplifier, a second RF power amplifier, second phase shifters, and a power combiner. Transmitting power Pout is detected by a first power level detector connected to an output of the first RF power amplifier, a second power level detector connected to an output of the second RF power amplifier, and an adder. A level control signal from a level control circuit controls transmitting power in response to a transmitting signal with wanted power level and a detected signal of the adder. | 09-22-2011 |
20110230150 | POWER CONSUMPTION MANAGEMENT IN A MIMO TRANSCEIVER AND METHOD FOR USE THEREWITH - A mobile communication device includes a first wireless transceiver that receives a first inbound RF signal and that transmits a first outbound RF signal based on a first power supply signal. A second wireless transceiver receives a second inbound RF signal and that transmits a second outbound RF signal based on a second power supply signal. A processing module generates at least one power mode signal based on first transmit power control data received via the first inbound RF signal. A power management circuit adjusts a first power consumption parameter of the first power supply signal and a second power consumption parameter of the second power supply signal based on the at least one power mode signal. | 09-22-2011 |
20110237209 | SOLAR POWERED TRANSMITTER - An embodiment of a light powered transmitter configured for broadcasting an electromagnetic control field to a region is provided. The transmitter includes a housing having a longitudinal axis. The housing includes a photovoltaic cell configured to generate electrical power in response to light and a rechargeable power source configured to store at least a portion of the power generated by the photovoltaic cell. The housing also includes an electromagnetic transmitter and a directional antenna. The directional antenna can be configured to broadcast an electromagnetic (e.g., radio-frequency) control field to a region. The directional antenna can be rotatably mounted in the housing such that the antenna can be rotated around the longitudinal axis. The housing can further include a transparent or translucent optical element configured to receive the light and converge at least a portion of the light onto the photovoltaic cell. | 09-29-2011 |
20110263216 | USER EQUIPMENT APPARATUS FOR SIMULTANEOUSLY TRANSMITTING SIGNALS VIA A PLURALITY OF WIRELESS COMMUNICATION CHIPS TO WHICH DIFFERENT WIRELESS COMMUNICATION SCHEMES ARE APPLIED AND METHOD FOR CONTROLLING TRANSMISSION POWER THEREOF - A user equipment apparatus for simultaneously transmitting signals from a plurality of wireless communication chips to which different wireless communication schemes are applied and a method for controlling a transmission power control of the user equipment apparatus are disclosed. The user equipment apparatus comprises a transmission mode decision module determining whether the user equipment apparatus is currently operated to transmit a signal through one wireless communication chip or simultaneously transmit signals, to which different wireless communication schemes are applied, through a plurality of wireless communication chips, and an intermodulation distortion (IMD) effect decision module determining whether a set of frequencies of the signals respectively transmitted from the plurality of wireless communication chips causes intermodulation distortion (IMD). | 10-27-2011 |
20110269415 | METHOD AND SYSTEM FOR SHOT TRACKING - The present invention is a method for transmitting a RFID signal while conserving battery power of a circuit. The method comprises charging a capacitor using a battery. The battery is in electrical communication with a resistor and the resistor is in electrical communication with a capacitor and a load switch. The load switch is in electrical communication with an enabler and a microprocessor. The microprocessor is in electrical communication with a radiofrequency component. The load switch is closed, allowing power drawn from the capacitor to flow to the radiofrequency component. | 11-03-2011 |
20110275334 | SERVO LOOP FOR QUALITY-FACTOR COMPENSATION IN A CAPACITOR ARRAY - The impedance of the elements of a capacitor array in the transmitter is kept substantially constant over changes in process, temperature, and supply voltage. The impedance is maintained substantially constant by compensating a gate voltage supplied to switches in each element of the capacitor array to adjust for changes in temperature and supply voltage to thereby maintain a substantially constant RC product for each unit element in the capacitor array and thereby improve the quality factor of the capacitor array. | 11-10-2011 |
20110275335 | METHODS AND SYSTEMS FOR SRS POWER SCALING IN CARRIER AGGREGATION - Certain aspects of the present disclosure relate to techniques for scaling transmission power. According to certain aspects, a technique for scaling transmission power may include scaling transmission power of one or more uplink channel symbols to be transmitted in a subframe, utilizing a first set of one or more scaling coefficients, scaling transmission power of one or more sounding reference signal (SRS) symbols to be transmitted in the same subframe, utilizing a second set of one or more scaling coefficients, wherein the first set of scaling coefficients is different from the second set of scaling coefficients, and transmitting the scaled one or more uplink channel symbols and the scaled one or more SRS symbols utilizing the scaled transmission power values. | 11-10-2011 |
20110275336 | TRANSMIT POWER MANAGEMENT FOR A COMMUNICATION DEVICE AND METHOD FOR USE THEREWITH - In integrated circuit includes a processing module that determines a selected one of the plurality of power modes based on a function being currently performed by at least one non-transceiver module of a host device, and generates a power mode signal based on the selected one of the plurality of power modes. An RF transmitter generates a transmit signal at a selected one of the plurality of operating power levels based on the power mode signal and that operates from at least one transmitter power supply signal generated and selected by a power management circuit in response to the power mode signal. | 11-10-2011 |
20110281534 | Phase Rotation Method for Reducing PAPR - A method of reducing a signal peak to average power ratio (PAPR) for a transmission channel in a wireless communication system is disclosed. The transmission channel is divided into a plurality of channel segments, and the method includes calculating PAPRs corresponding to the plurality of channel segments by a plurality of phase rotation vectors; selecting a plurality of specified phase rotation vectors from the plurality of phase rotation vectors according to the calculated PAPRs; and using one of the plurality of specified phase rotation vectors to rotate a phase of a signal to be transmitted. | 11-17-2011 |
20110287727 | ENERGY SELF-SUFFICIENT RADIOFREQUENCY TRANSMITTER - The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna. | 11-24-2011 |
20120034886 | Transmitter Linearized Using Inversing and Non-Inversing Transform Processing Sections and Method Therefor - A transmitter ( | 02-09-2012 |
20120034887 | Transmitter Linearized Using Cartesian-Processed Look-Up Table and Method Therefor - A transmitter ( | 02-09-2012 |
20120115426 | POWER AMPLIFIER SATURATION DETECTION - In a portable radio transceiver, a power amplifier system includes a saturation detector that detects power amplifier saturation in response to duty cycle of the amplifier transistor collector voltage waveform. The saturation detection output signal can be used by a power control circuit to back off or reduce the amplification level of the power amplifier to avoid power amplifier control loop saturation. | 05-10-2012 |
20120122412 | METHOD FOR CONTROLLING THE POWER FOR BROADCASTING A COGNITIVE PILOT CHANNEL - The invention relates to a method for controlling the power for broadcasting a Cognitive Pilot Channel broadcasting lists of information to each of a plurality of meshes M | 05-17-2012 |
20120135696 | Managing A Power Consumption Of A Mobile Communication Device - The invention relates to managing a power consumption of a mobile communication device being capable of transmitting transmission data at a transmission data rate towards a communication network. The method comprises reducing ( | 05-31-2012 |
20120142291 | Distribution of Transmit Signal to Multiple Transmit Antennas for Reduction of Measured Specific Absorption Rate - Various embodiments of the present invention recognize at least two zones of operation for a communication device. In a first zone, which is sufficiently spaced away from a human head or body that SAR limits will be met, transmit power delivered to an antenna of a communication device may be maximized within any other constraints under which the communication device operates. In a second zone, which is not sufficiently spaced away from a human head or body, transmit power is redistributed such that SAR limitations are met without affecting the transmit power control loop of the communication device. For example, a second antenna physically disposed at a different location within the communication device may be used either instead of, or in addition to, the first transmit antenna in order that the SAR limits are met. | 06-07-2012 |
20120157018 | WIRELESS MEASUREMENT TRANSMITTER WITH REPLACEABLE MODULE - A measurement transmitter includes a main housing body with a first cavity closed by a first cover and a second cavity closed by a second cover. A measurement circuit assembly in the first cavity includes power and service communication conductors that extend through the main housing body to contacts in the second cavity. A replaceable module plugs into the contacts in the second cavity and includes a primary battery and a service communication connector. The service communication connector is exposed for connection to service equipment by removal of the second cover. | 06-21-2012 |
20120157019 | WIRELESS POWER TRANSMISSION SYSTEM, WIRELESS POWER TRANSMITTING APPARATUS AND WIRELESS POWER RECEIVING APPARATUS - A wireless power transmission system includes a wireless power transmitting apparatus and a wireless power receiving apparatus. The wireless power transmitting apparatus includes a signal generator and an ultrasonic transmitting unit. The ultrasonic transmitting unit generates and outputs a focused ultrasonic wave according to a signal outputted from the signal generator. The wireless power receiving apparatus includes an ultrasonic receiving unit and a power conversion unit. The ultrasonic receiving unit receives the focused ultrasonic wave outputted from the wireless power transmitting apparatus and converts the focused ultrasonic wave into electrical power energy. The power conversion unit performs a power conversion on the electrical power energy and thereby provides the converted electrical power energy to a back-end circuit. The ultrasonic signal can also be encoded in the transmitting unit and subsequently decoded in the receiving unit as a means to remotely control the back-end circuit in the receiving unit. | 06-21-2012 |
20120157020 | AMPLIFIER CIRCUIT, CONTROL METHOD FOR SUPPLYING POWER TO AMPLIFIER CIRCUIT, AND TRANSMISSION DEVICE - An amplifier circuit includes an amplifier, a detecting unit which detects a power output from the amplifier, a control unit which controls a saturation point of the amplifier with respect to a Peak-to-Average Power Ratio (PAPR) obtained by a detection output of the detecting unit. | 06-21-2012 |
20120164961 | Wireless Display Performance Enhancement - Embodiments may comprise logic such as hardware and/or code to adaptively control the transmission power for a wireless channel. In many embodiments, adaptively controlling the transmission power may reduce or, in some embodiments, minimize interference between the wireless display (WiDi) transmissions and other transmissions such as multimedia content streaming over another wireless channel to the notebook via a second generation (2G) channel, third generation (3G) channel, or a future long term evolution (LTE) channel. | 06-28-2012 |
20120164962 | PROXIMITY SENSOR MODULE AND ELECTRONIC DEVICE USING SAME - A proximity sensor module used in an electronic device includes a combination sensing element and antenna, and a detecting circuit electrically connected to the combination sensing element and antenna. The combination sensing element and antenna is used to detect whether an external object is in vicinity of the combination sensing element and antenna according to capacitance changes of the combination sensing element and antenna in presence or absence of an external object in the vicinity, the detecting circuit detects the capacitance changes, and generates a signal associated with the changes to decrease or increase transmission power transmitted to the combination sensing element and antenna. | 06-28-2012 |
20120171975 | METHOD FOR CONTROLLING PEAK-TO-AVERAGE POWER RATIO OF SINGLE CARRIER FDMA SYSTEM - A method for controlling peak-to-average power ratio prior to amplification by a power amplifier is provided. The peak sample of a signal is predicted, window length is adjusted based on the peak width around the peak sample or subcarriers used to transmit the signal, and the window is subsequently used to clip the samples. A peak suppression window may be applied prior to predicting the peak sample when a set number of samples exceed a predetermined threshold. Window clipping may be deactivated if interference and throughput of the power amplifier is detrimentally affected. A pulse shaping filter may be optimized based on the window clipping to control transmitted signal characteristics. Various thresholds used in the prediction may be initially based on system design and power amplifier linearity and then dynamically adjusted based on an estimation of active subcarriers or of interferers present in the communication system. | 07-05-2012 |
20120190318 | APPARATUS FOR TRANSMITTING A SIGNAL BELOW A CURRENT TRANSMIT POWER IN A NETWORK - A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be set to be less than the standard power in any of a variety of ways. For example, a center tap voltage of the transmitter may be reduced. In another example, a class of operation of the transmitter may be changed. In yet another example, the transmitter may include a current mirror having a plurality of diode-connected transistors coupled in parallel, thereby reducing the current at output terminals of the transmitter. Reducing the current at the output terminals decreases the output power of the transmitter, which may reduce the power consumed by the transmitter. | 07-26-2012 |
20120208478 | SYSTEM AND METHOD FOR CONTROLLING POWER LEVELS - An apparatus comprises a radio frequency (RF) signal source; and a controller configured to adjust power of the RF signal source based on a detected parameter. In one embodiment, the apparatus further comprises a proximity sensor configured to determine proximity of the RF signal source to live tissue, and the detected parameter is the proximity determined by the proximity sensor. The RF signal source may be an RF antenna. The controller may be configured to reduce the power of the RF signal source when the proximity is less than a predetermined threshold value. The controller may be configured to reduce the power to a predetermined reduced power level. | 08-16-2012 |
20120214431 | TRANSMITTER AND POWER SUPPLY CONTROL MODULE - A transmitter includes: a first envelope extractor that extracts a first envelope signal on the basis of a first modulated signal of a first frequency modulated with transmission data; a second envelope extractor that extracts a second envelope signal on the basis of a second modulated signal of a second frequency modulated with the transmission data, the second frequency being higher than the first frequency; an amplifier that amplifies one of the first modulated signal and the second modulated signal; a power adjuster that outputs a voltage of power supplied to the amplifier; and a controller that makes the amplifier amplify one of the first modulated signal and the second modulated signal and makes the power adjuster output the voltage of the supplied power on the basis of corresponding one of the first envelope signal and the second envelope signal. | 08-23-2012 |
20120214432 | AMPLIFIER CIRCUIT, TRANSMITTER, AND METHOD OF CONTROLLING AMPLIFIER CIRCUIT - A signal separating unit separates an input signal into a first branch signal and a second branch signal in such a manner that, as the amplitude of the input signal decreases, the amplitude of the first branch signal and the second branch signal decreases and the difference between a phase of the first branch signal and a phase of the second branch signal increases and, as the amplitude of the input signal increases, the amplitude of the first branch signal and the second branch signal increases and the difference between the phase of the first branch signal and the phase of the second branch signal decreases. An amplifier amplifies the first branch signal. Another amplifier amplifies the second branch signal. A combining unit combines signals that are output from the amplifiers together, thereby generating an output signal. | 08-23-2012 |
20120252383 | TRANSMITTER - A transmitter is adapted to be programmed to select an amplifier operating class for the transmitter out of a plurality of amplifier operating classes. The transmitter is also adapted to operate according to the selected amplifier operating class to communicate a signal to an antenna. | 10-04-2012 |
20120252384 | Integrated RF Front End with Stacked Transistor Switch - A monolithic integrated circuit (IC), and method of manufacturing same, that includes all RF front end or transceiver elements for a portable communication device, including a power amplifier (PA), a matching, coupling and filtering network, and an antenna switch to couple the conditioned PA signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a PA control circuit to limit PA output power in response to excessive values of sensed output. Stacks of multiple FETs in series to operate as a switching device may be used for implementation of the RF front end, and the method and apparatus of such stacks are claimed as subcombinations. An iClass PA architecture is described that dissipatively terminates unwanted harmonics of the PA output signal. | 10-04-2012 |
20120258676 | Filter - Method and filter for filtering a signal, in which the signal is applied to a delay line having a plurality of taps. Respective weighting coefficients of a windowing function are applied to outputs from the plurality of taps to thereby generate a plurality of weighted outputs. The method comprises repeatedly selecting, for output, whichever of the weighted outputs has the highest value. | 10-11-2012 |
20120270512 | Transfer Gate Circuit and Power Combining Circuit, Power Amplifying Circuit, Transmission Device, and Communication Device Using the Transfer Gate Circuit - Provided are a transfer gate circuit that has reduced disturbance in an output waveform thereof, a power combining circuit using the transfer gate circuit, and a transmission device and a communication device that use the power combining circuit. The transfer gate circuit includes: output terminals ( | 10-25-2012 |
20120270513 | TRANSMIT POWER MANAGEMENT FOR A COMMUNICATION DEVICE AND METHOD FOR USE THEREWITH - In integrated circuit includes a processing module that determines a selected one of the plurality of power modes based on a function being currently performed by at least one non-transceiver module of a host device, and generates a power mode signal based on the selected one of the plurality of power modes. An RF transmitter generates a transmit signal at a selected one of the plurality of operating power levels based on the power mode signal and that operates from at least one transmitter power supply signal generated and selected by a power management circuit in response to the power mode signal. | 10-25-2012 |
20120276861 | INFORMATION PROCESSING APPARATUS AND RADIO WAVE INTENSITY CONTROL METHOD - An information processing apparatus has radio communication function. A tilt detection unit detects a tilt of the information processing apparatus. An output changing unit changes an output of radio waves from an antenna for radio communication. Based on a detection result through the tilt detection unit, when a tilt θ of a predetermined external surface of a chassis of the information processing apparatus to a horizontal surface H is a predetermined angle or less, an output controller reduces an output of radio waves from the antenna to a predetermined value or less with respect to the output changing unit. | 11-01-2012 |
20120276862 | METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode. | 11-01-2012 |
20120282869 | RF PA LINEARITY REQUIREMENTS BASED CONVERTER OPERATING MODE SELECTION - A power amplifier (PA) envelope power supply, radio frequency (RF) PA circuitry, and a process to select a converter operating mode of the PA envelope power supply based on linearity requirements of the RF PA circuitry is disclosed. The PA envelope power supply operates in one of a first converter operating mode and a second converter operating mode. The process for selecting the converter operating mode is based on a required degree of linearity of the RF PA circuitry. The PA envelope power supply provides an envelope power supply signal to the RF PA circuitry. Selection of the converter operating mode may provide efficient operation of the PA envelope power supply and the envelope power supply signal needed for proper operation of the RF PA circuitry. | 11-08-2012 |
20120302186 | INDEPENDENT PA BIASING OF A DRIVER STAGE AND A FINAL STAGE - A radio frequency (RF) communications system, which includes power amplifier (PA) control circuitry and PA bias circuitry, is disclosed. The PA control circuitry identifies a selected communications mode of the RF communications system and a target output power from RF PA circuitry. The PA control circuitry selects a PA bias level of a driver stage of the RF PA circuitry and a PA bias level of a final stage of the RF PA circuitry based on the selected communications mode and the target output power. The PA bias circuitry establishes a PA bias level for the driver stage and a PA bias level for the final stage based on the selected PA bias levels of the driver stage and the final stage, respectively. | 11-29-2012 |
20120309333 | RADIO TRANSMITTER AND ENVELOPE TRACKING POWER SUPPLY CONTROL METHOD - The envelope tracking power supply includes a plurality of variable voltage supplies. A power supply controller of a power amplifier controls the plurality of variable voltage supplies so as to precisely divide the power supply voltage in a high frequency area, based on the voltage distribution of a received transmitted base band signal, in order to maximize the power added efficiency of the power amplifier. The power supply controller includes a threshold memory including a plurality of first zones, and a frequency memory including a plurality of second zones. The power supply controller changes the threshold held in the first zones so that each second zone approaches the average of the second zones. | 12-06-2012 |
20120329409 | INTRINSICALLY SAFE PORTABLE RADIO ARCHITECTURE - An intrinsically safe portable radio device ( | 12-27-2012 |
20120329410 | Thermal-based flow control - Methods, devices, and apparatuses are provided for detecting that a temperature of at least a portion of a mobile device is above a mitigation threshold, adjusting transmit power, used on a first channel by said mobile device, by a first backoff amount during a first backoff interval, based, at least in part, on said detected temperature. Further included is suppressing a transmission during a response interval used on a second channel by said mobile device. | 12-27-2012 |
20120329411 | Method and Apparatus for Improving Power Amplifier Efficiency in Wireless Communication Systems Having High Peak to Average Power Ratios - A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block. | 12-27-2012 |
20130029617 | VOLTAGE DRIVING APPARATUS FOR POWER AMPLIFIER, POWER AMPLIFYING SYSTEM, POWER SUPPLY DEVICE AND COMMUNICATION DEVICE - A voltage driving apparatus ( | 01-31-2013 |
20130040590 | ELECTRONIC CIRCUIT AND RADIO COMMUNICATIONS SYSTEM - The electronic circuit includes: a micro controller unit; a timer operable to measure a standby time of the micro controller unit; a buffer circuit connected with an output-signal terminal of the timer; a logic circuit controlled by an output signal of the timer and an output signal of the micro controller unit; and a power-on switch controlled by the logic circuit. The buffer circuit has no protection diode connected with an input terminal thereof on a power-source side, and connected to a common power source shared with the micro controller unit. The switch is one for controlling the power source of the micro controller unit and buffer circuit. The micro controller unit is made to transition to an active state to either a standby state or a power-source cutoff state during the standby time. | 02-14-2013 |
20130045699 | Stacked CMOS Power Amplifier and RF Coupler Devices and Related Methods - Stacked CMOS power amplifier (PA) and radio frequency (RF) coupler devices and related methods are disclosed. The stacked device includes a CMOS PA die configured to receive a transmit input signal and to output an amplified transmit signal, and a RF coupler device configured to receive the amplified transmit signal, to output an antenna transmit signal, and to output an RF signal proportional to the antenna transmit signal. The CMOS PA die and the RF coupler device are stacked on top of and electrically coupled to each other, and the CMOS PA die and the RF coupler device are combined within a single semiconductor package. In some embodiments, the RF coupler device is positioned on top of the CMOS PA die, and in other embodiments the CMOS PA die is positioned on top of the RF coupler device. | 02-21-2013 |
20130059554 | MULTI-MODE POWER SUPPLY REGULATOR FOR POWER AMPLIFIER CONTROL - A radio frequency (RF) power amplification system in which a combination of a linear voltage regulator having a PFET pass device and a DC-DC converter having an NFET pass device is used to supply power to an RF power amplifier. The RF power amplifier receives power from either the linear voltage regular and its associated PFET pass device or the DC-DC converter and its NFET pass device, depending upon the condition of a mode signal. | 03-07-2013 |
20130078934 | Systems and Methods of RF Power Transmission, Modulation, and Amplification - An apparatus, system, and method are provided for energy conversion. For example, the apparatus can include a trans-impedance node, a reactive element, and a trans-impedance circuit. The reactive element can be configured to transfer energy to the trans-impedance node. The trans-impedance circuit can be configured to receive one or more control signals and to dynamically adjust an impedance of the trans-impedance node. The trans-impedance node, as a result, can operate as an RF power switching supply based on the one or more control signals. | 03-28-2013 |
20130090075 | Peak Detector with Extended Range - According to one embodiment, a peak detector having extended dynamic range comprises a first differential output coupled to a supply voltage of the peak detector by a first load and coupled to ground by first and second switching devices, and a second differential output coupled to the supply voltage by a second load and coupled to ground by third and fourth switching devices. The control terminals of the first, second, third, and fourth switching devices receive a common bias voltage, and the respective first and second control terminals are configured as differential inputs of the peak detector. In some embodiments, corresponding first power terminals of the first and second switching to devices share a first common node further shared by the first differential output, and corresponding first power terminals of the third and fourth switching devices share a second common node further shared by the second differential output. | 04-11-2013 |
20130115901 | Utility Meter Power Arrangements and Methods - An arrangement for providing power in a utility meter includes a power supply and at least one capacitor. The power supply is configured to convert input AC voltage to a DC bias voltage, and is further configured to provide the bias voltage to metering circuitry within the utility meter. The metering circuitry includes an analog to digital converter and at least one processor. The capacitor is operably coupled to provide power to the RF transmitter at least when power requirements of the RF transmitter exceed an amount of power available from the power supply. | 05-09-2013 |
20130130633 | Radio-Frequency Device and Wireless Communication Device - A radio-frequency (RF) device and a wireless communication device include a capacitive sensing unit capable of using a radiating element of an antenna to sensing an environment capacitance within a specified range, such that an RF signal processing device is capable of adjusting power of an RF signal accordingly, to prevent affecting a user. When the radiating element of the antenna includes a direct-current signal route to a ground terminal, the RF device and the wireless communication device further includes at least a capacitor for cutting off the direct-current signal route. | 05-23-2013 |
20130149977 | ENERGY SELF-SUFFICIENT RADIOFREQUENCY TRANSMITTER - The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna. | 06-13-2013 |
20130157597 | TRANSMIT POWER MANAGEMENT FOR A COMMUNICATION DEVICE AND METHOD FOR USE THEREWITH - In integrated circuit includes a processing module that determines a selected one of the plurality of power modes based on a function being currently performed by at least one non-transceiver module of a host device, and generates a power mode signal based on the selected one of the plurality of power modes. An RF transmitter generates a transmit signal at a selected one of the plurality of operating power levels based on the power mode signal and that operates from at least one transmitter power supply signal generated and selected by a power management circuit in response to the power mode signal. | 06-20-2013 |
20130178178 | SYSTEM AND METHOD FOR CONTROLLING POWER LEVELS BASED ON HOST IDENTIFICATION - Systems and methods are provided for controlling radio frequency (RF) levels in wireless communications devices, such as embedded modems, while optimizing performance of the wireless communications devices. Controlling RF levels is achieved by adjusting transmitted power levels of an embedded modem based upon a type or model of host device that the embedded modem is operatively connected to. By tailoring output power levels to specific host devices, regulations related to limiting RF exposure, such as specific absorption rate (SAR) or maximum permissible exposure (MPE) limits, may be met without unduly affecting performance of the wireless communications devices. | 07-11-2013 |
20130183916 | MODIFIED SWITCHING RIPPLE FOR ENVELOPE TRACKING SYSTEM - Radio frequency (RF) transmitter circuitry, which includes an RF power amplifier (PA) and an envelope tracking power supply, is disclosed. The RF PA receives and amplifies an RF input signal to provide an RF transmit signal using an envelope power supply signal. The envelope tracking power supply provides the envelope power supply signal, which has switching ripple. Further, the envelope tracking power supply operates in either a normal switching ripple mode or a modified switching ripple mode, such that during the normal switching ripple mode, the envelope power supply signal has normal switching ripple, and during the modified switching ripple mode, the envelope power supply signal has modified switching ripple. When the modified switching ripple is required, the envelope tracking power supply operates in the modified switching ripple mode. | 07-18-2013 |
20130189939 | LAYERED BEACON TRANSMISSION AND RECEPTION - In one embodiment, a method comprising adjusting a power amplifier to provide a primary beacon at a first power level; adjusting the power amplifier to provide a secondary beacon at a second power level, the second power level less than the first power level; receiving a response signal from a receiving device responsive to the secondary beacon; and determining that the receiving device is within an intended coverage area responsive to receiving the response signal. | 07-25-2013 |
20130203367 | ELECTRONIC DEVICE WITH ADJUSTABLE FILTER AND ASSOCIATED METHODS - An electronic device includes an adjustable filter with a first filter element, and a second filter element coupled to the first filter element. The second filter element includes a field effect transistor (FET) including a source terminal, a drain terminal, and a gate terminal. The source terminal and the gate terminal are coupled to a reference voltage. A control circuit is coupled to the drain terminal and is configured to apply a control voltage thereto to vary a capacitance between the source and drain terminals to adjust the adjustable filter. | 08-08-2013 |
20130237166 | Amplitude Modulation Utilizing a Leaky Wave Antenna - Methods and systems for amplitude modulation using a leaky wave antenna are disclosed and may include amplitude modulating an output of one or more power amplifiers in a wireless device by modulating a bias current in the power amplifiers that are coupled to one or more leaky wave antennas. The leaky wave antennas may include a balun that may be integrated on the chip, on a package to which the chip may be affixed, and/or integrated on a printed circuit board to which the chip may be affixed. An output power of the power amplifiers may be adjusted by configuring a bias voltage on the leaky wave antennas. The bias voltage may be configured utilizing a DC to DC voltage controller. The bias current may be modulated via one or more switched current sources. The switched current sources may be binary weighted and/or may be current mirrors. | 09-12-2013 |
20130288620 | Systems and Methods of Amplification including Multiple Input Single Output (MISO) Amplifiers - Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion. | 10-31-2013 |
20130288621 | Power harvesting wireless transmitter - Apparatus for a power harvesting wireless transmitter. The wireless transmitter includes a magnet, an inductor, a power supply, a processor, and a transmitter with an antenna. The magnet interacting with the inductor provides a sole source of power sufficient to power the transmitter. The inductor is connected to the power supply. The power supply includes a voltage multiplier, a storage unit, and, in one embodiment, a voltage regulator. The processor includes at least one input connected to one or more local switches, sensors, and instruments. The processor outputs an identifier and data corresponding to the inputs. The processor output is connected to the transmitter, which sends a wireless signal containing the identifier and data. | 10-31-2013 |
20130303094 | RADIO TRANSMISSION MODULES HAVING INTRINSIC SAFETY - Described herein are arrangements and methods for achieving intrinsic safety for a radio transmission module. One aspect provides an apparatus for transmitting signals in an explosion-hazardous area with intrinsic safety, including: a radio transmission module having a high frequency module and an electronic control circuit disposed on a printed circuit board, said electronic control circuit being configured to control a voltage supply to the high frequency module in response to one or more of: output voltage of the high frequency module exceeding a predetermined voltage value, as independently measured by at least two independently operating hardware circuits; and a temperature of a heat-conducting potting compound potted over heat generating components disposed on the printed circuit board exceeding a predetermined temperature value, as independently sensed by at least two independently operating temperature circuits. Other embodiments are described. | 11-14-2013 |
20130324059 | WIRELESS DEVICE WITH HYBRID ENERGY CHARGING - A hybrid energy control system comprising a first energy harvester, a second energy harvester, an energy reservoir operably connected to the first energy harvester and the second energy harvester. The hybrid energy control system is particularly suited for use in wireless RF devices, such as RF tracking devices. | 12-05-2013 |
20130331046 | CONTROLLING ANTENNA OUTPUT POWER - An embodiment provides a information handling device, including: one or more processors; one or more antennas, a communication element, and a memory device that stores instructions executed by the one or more processors, the instructions being executable by the one or more processors to: recognize a location within which the information handling device is operating through wireless communication received via the communication element; and modulate, based on which location the information handling device is operating within, a dynamic power reduction of transmission power through the antenna. | 12-12-2013 |
20130331047 | INFORMATION PROCESSING DEVICE, POWER SOURCE CONTROL METHOD AND PROGRAM FOR IMAGE PROCESSING DEVICE - Provided is an information processing apparatus including an IC module that performs communication with an external apparatus, a detection unit that detects an electric wave, a timer that measures a time course after being started, a power supply unit that supplies a power source to the IC module, and a control unit that controls a supply amount of the power source based on a detection result of the electric wave and a determination result of a value of the timer. The control unit starts the timer after terminating communication with the external apparatus, restarts the timer every time a transmission start of an electric wave is detected, in response to detection of an electric wave received from an outside at a predetermined interval in the detection unit. | 12-12-2013 |
20130344830 | CONTROLLING RADIO TRANSMITTER POWER BASED ON SIGNAL PERFORMANCE - Embodiments herein include a method of controlling the total power with which a radio transmitter of a radio access node transmits a signal. The method entails inputting an input signal into a power amplifier of the radio transmitter to produce, as a function of the input signal, an output signal to be transmitted by the radio transmitter. The method further entails generating a feedback signal from the output signal at the radio transmitter, and measuring that feedback signal to obtain one or more performance metrics that characterize performance of the output signal. The method finally includes comparing the one or more performance metrics to one or more performance metric thresholds, and controlling a maximum permissible level of the total power of the input signal, based on that comparison. | 12-26-2013 |
20140024325 | METHOD AND SYSTEM FOR PROVIDING WIRELESS BASE STATION RADIO WITH NON-DISRUPTIVE SERVICE POWER CLASS SWITCHING - A system and method of implementing an on-demand change of the RF power class of multi-carrier power amplifiers at a base station radio with minimal disruption of user service is disclosed. The power amplifiers providing signal diversity at said cell site and being able to operate at various RF power class levels. A first multi-carrier power amplifier with multiple RF Power Classes provides a main RF beam transmission at one sector of said cell site. A second multi-carrier power amplifier with multiple RF Power Classes provides RF beam transmission diversity to the main RF beam transmission. A switch operates to disable either the first or second multi-carrier power amplifier when an RF Power class change is required. | 01-23-2014 |
20140087676 | On-Chip Distributed Power Amplifier and On-Chip or In-Package Antenna for Performing Chip-To-Chip and Other Communications - A transmitter front-end for wireless chip-to-chip communication, and potentially for other, longer range (e.g., several meters or several tens of meters) device-to-device communication, is disclosed. The transmitter front-end includes a distributed power amplifier capable of providing an output signal with sufficient power for wireless transmission by an on-chip or on-package antenna to another nearby IC chip or device located several meters or several tens of meters away. The distributed power amplifier can be fully integrated (i.e., without using external components, such as bond wire inductors) on a monolithic silicon substrate using, for example, a complementary metal oxide semiconductor (CMOS) process. | 03-27-2014 |
20140106693 | POWER MANAGEMENT CONFIGURATION FOR TX MIMO AND UL CARRIER AGGREGATION - A communication device is disclosed that efficiently manages power. In one embodiment, this communication device includes a first (main) transmitter including a first low band amplifier and a first high band amplifier; a second (MIMO) transmitter including a second low band amplifier and a second high band amplifier; a first power manager in communication with the first low band amplifier and with the second high band amplifier; a second power manager in communication with the first high band amplifier and with the second low band amplifier; and a control system in communication with the first transmitter, the second transmitter, the first power manager, and the second power manager. | 04-17-2014 |
20140120852 | WIRELESS COMMUNICATION DEVICE - Provided is a wireless communication device in which an antenna switch module is omitted. The wireless communication device includes a PA that amplifies a transmission signal, a transmission circuit that processes the amplified transmission signal, an antenna, and a control unit that alternately activates and deactivates the PA, the transmission circuit being configured to match an impedance between the transmission circuit and the antenna when the PA is activated, and to put an impedance as seen from the antenna toward the transmission circuit when the PA is deactivated in a high impedance state. | 05-01-2014 |
20140128013 | LOW VARIATION CURRENT MULTIPLIER - Aspects of the present disclosure relate to a current multiplier that can generate an output current with high linearity and/or high temperature compensation. Such current multipliers can be implemented by complementary metal oxide semiconductor (CMOS) circuit elements. In one embodiment, the current multiplier can include a current divider and a core current multiplier. The current divider can generate a divided current by dividing an input current by an adjustable division ratio. The division ratio can be adjusted, for example, based on a comparison of the input current with a reference current. The core current multiplier can generate the output current based on multiplying the divided current and a different current. According to certain embodiments, the output current can be maintained within a predetermined range as the input current to the current divider varies within a relatively wide range. | 05-08-2014 |
20140141736 | WIRELESS COMMUNICATION DEVICE AND POWER CONTROL METHOD - A wireless communication device includes: an amplifier configured to amplify a transmission signal to a given power level, the transmission signal being transmitted in wireless communication; and a processor coupled to the amplifier and configured to: select a communication protocol that is used for the wireless communication, from among a plurality of communication protocols including a first communication protocol and a second communication protocol of a lower communication speed than the first communication protocol, in accordance with a condition of the wireless communication, and control power source voltage of the amplifier by a control scheme determined in accordance with a communication speed of the selected communication protocol. | 05-22-2014 |
20140179249 | INTEGRATED RF FRONT END WITH STACKED TRANSISTOR SWITCH - A monolithic integrated circuit (IC), and method of manufacturing same, that includes all RF front end or transceiver elements for a portable communication device, including a power amplifier (PA), a matching, coupling and filtering network, and an antenna switch to couple the conditioned PA signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a PA control circuit to limit PA output power in response to excessive values of sensed output. Stacks of multiple FETs in series to operate as a switching device may be used for implementation of the RF front end, and the method and apparatus of such stacks are claimed as subcombinations. An iClass PA architecture is described that dissipatively terminates unwanted harmonics of the PA output signal. A preferred embodiment of the RF transceiver IC includes two distinct PA circuits, two distinct receive signal amplifier circuits, and a four-way antenna switch to selectably couple a single antenna connection to any one of the four circuits. | 06-26-2014 |
20140187183 | TRANSMISSION SIGNAL POWER CONTROL DEVICE AND COMMUNICATION APPARATUS - A transmission signal power control device includes: at least one low-power attenuator configured to attenuate amplitude of a transmission signal when an absolute value of the amplitude of the transmission signal is smaller than or equal to a clipping threshold; a power amplifier configured to amplify the transmission signal output from the at least one low-power attenuator; and a control unit configured to stop operation of the power amplifier when the absolute value of the amplitude of the transmission signal is smaller than or equal to a value and operate the power amplifier when the absolute value of the amplitude of the transmission signal is larger than the value. | 07-03-2014 |
20140213203 | CIRCUIT AND MOBILE COMMUNICATION DEVICE - A description is given of a circuit having a transmitter having a first transmission stage for generating a first transmission signal according to a first standard and a bias stage for generating a bias signal for a second standard and a second transmission stage for generating a second transmission signal according to the second standard. The second transmission stage is effectively coupled to the bias stage in order to receive the bias signal. | 07-31-2014 |
20140357206 | RADIO FREQUENCY TRANSMITTER, POWER COMBINERS AND TERMINATIONS THEREFOR - A power combiner includes a planar figure-8 shaped primary winding and a planar figure-8 shaped secondary winding; wherein, the planar figure-8 shaped primary winding is substantially overlaid with the planar figure-8 shaped secondary winding. In addition, there is provided a radio frequency (RF) transmitter having a power combiner, where the power combiner includes a planar figure-8 shaped primary winding and a planar figure-8 shaped secondary winding, wherein the planar figure-8 shaped primary winding is substantially overlaid with the planar figure-8 shaped secondary winding. | 12-04-2014 |
20140364074 | ENERGY SELF-SUFFICIENT RADIOFREQUENCY TRANSMITTER - The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna. | 12-11-2014 |
20140370830 | DEVICE DYNAMIC TOTAL RF POWER COMPENSATION - A system and method may dynamically control the total RF power emissions of a mobile device. The method may include determining the local RF operating situation of the mobile device; setting a maximum power limit according to the local RF operating situation; and/or adjusting an active transmitted power of the mobile device within the maximum power limit. The local RF operating situation may be determined based upon (1) the measuring of a matching of the mobile device's radio antenna(s); (2) currently active application(s); (3) the number/type of active radios; (4) frequency or wavelength of transmissions; (5) network, relay, or node RF operating or exposure conditions; and/or (6) a power control process. The mobile device may be hand-held device, HomeNodeB, or other device capable of RF communications. The local RF operation situation and/or available headroom may be communicated to a network base station or node to facilitate enhanced mobile device performance. | 12-18-2014 |
20150050900 | VOLTAGE REGULATING CIRCUIT AND METHOD THEREOF - A voltage regulating circuit and a method thereof are provided. The voltage regulating circuit includes: a tank circuit, an error amplifier, an output circuit, and a feedback circuit. The tank circuit provides a fixed voltage. The error amplifier generates an amplified voltage according to a reference voltage and a feedback voltage. The output circuit converts a supply voltage into an output voltage in response to at least one of the amplified voltage and the fixed voltage. The feedback circuit generates a feedback voltage according to the output voltage. | 02-19-2015 |
20150087251 | RF Power Transmission, Modulation, and Amplification, Including Direct Cartesian 2-Branch Embodiments - Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion. | 03-26-2015 |
20150099479 | HIGHER EFFICIENCY CARBON NANOTUBE ANTENNA - A signal transmitter includes a carbon nanotube antenna and a heat to electricity conversion device, which powers an amplifier in the transmitter. The heat from the inefficiency of the antenna is conducted to the heat to electricity conversion device. Additional heat from the transmitter electronics and any other inefficient processes can also be conducted to the heat to electricity conversion device. In this manner, the overall efficiency of the carbon nanotube antenna can be substantially increased. | 04-09-2015 |
20150319700 | POWER CONTROL METHODS AND PROCEDURES FOR WIRELESS LOCAL AREA NETWORKS - A method and apparatus is described herein for performing loop power control and transmission power control (TPC) in a wireless network. Described herein are methods including using separate power control loops for communication with an entire wireless network and for point-to-point (P2P) transmissions and separate power control loops for omni-directional and directional beamformed transmissions. Also described herein are methods and apparatuses for requesting clear channel assessment (CCA) measurements and adjusting CCA thresholds and transmission power based on the reported measurements. Methods and apparatuses are also described wherein access points (APs) coordinate transmission power to reduce interference with each other and to determine optimal transmission power to each mobile station (STA). | 11-05-2015 |
20150326256 | COMPRESSED AMPLITUDE WIRELESS SIGNAL AND COMPRESSION FUNCTION - Compression of an input signal prior to high power radio frequency (RF) amplification and transmission is disclosed. A compression device can receive an input signal and generate a compressed signal that can be passed to an amplification stage to reduce intermodulation effects. The compression device can further generate compression information that can be transmitted to enable a mobile device receiving an amplified version of the compressed signal and the compression information to decompress the amplified version of the compressed signal. Further, a mobile device that can receive an amplified compressed signal and compression information, such that the mobile device can decompress the amplified compressed signal, is also disclosed. The disclosed subject matter can enable use of lower cost, smaller, and less complex RF amplifiers within a wireless network environment. | 11-12-2015 |
20150340991 | MULTI-BAND POWER AMPLIFIER - An apparatus includes a first capacitor, an inductor coupled to the first capacitor, and a second capacitor coupled to the inductor. The second capacitor is coupled to a first output of a differential amplifier. | 11-26-2015 |
20150341842 | WIRELESS DEVICE POWERED BY MEMS WITH ADAPTIVE COMMUNICATIONS - A wireless device includes a wireless interface, a Micro Electro-Mechanical System (MEMS) energy harvesting component, energy storage coupled to the MEMS energy harvesting component, and processing circuitry. The processing circuitry is configured to determine an amount of energy collected by the MEMS energy harvesting component or stored in the energy storage in response to an energy collection event, based upon the amount of energy collected, determine wireless communication operations, and communicate with a remote device via the wireless interface according to the determined wireless communication operations. The determined wireless communication operations may be a communication format for use in communicating with the remote device, a communication frequency band for use in communicating with the remote device, an amount of data to be transmitted to the remote device, the amount of energy collected for the energy collection event, or a number of transmissions and receipts to communicate with the remote device. | 11-26-2015 |
20160044600 | POWER CONTROL METHOD AND APPARATUS IN WIRELESS ACCESS SYSTEM - The present invention provides methods for transmitting a scheduling request (SR) in a wireless access system supporting a multiple connection mode, in which a terminal is connected to two or more small cells, and apparatuses supporting the same. According to one embodiment of the present invention, a method for transmitting an SR, by a terminal, in a wireless access system supporting a multiple connection mode comprises the steps of: receiving an upper layer signal including an SR parameter for SR transmission from a first small cell which is in a multiple connection mode state; generating an SR on the basis of the SR parameter; and transmitting the SR using a physical uplink control channel (PUCCH) signal. Herein, the SR parameter is pre-set by negotiation between the first small cell and a second small cell which is in a multiple connection mode. Furthermore, in the multiple connection mode, the terminal maintains multiple connections with two or more small cells including the first small cell and the second small cell, and the first small cell and the second small cell may be connected to each other via a non-ideal backhaul link. | 02-11-2016 |
20160049967 | RF TRANSMITTER FOR ELECTRICALLY SHORT ANTENNA - An RF transmitter comprises a capacitive energy storage, an output stage and a switching circuit with an open state and a closed state. The capacitive energy storage forms with the antenna when connected thereto a resonance circuit with a resonance frequency and a quality factor. The output stage provides an electric transmission signal to the resonance circuit. The switching circuit comprises a first transistor for switching between the open state and the closed state and is connected to an antenna output terminal through a capacitance formed by the capacitive energy storage such that the maximum signal voltage occurring across the switching circuit in its open state is lower than the maximum signal voltage occurring across the antenna output terminals. The transmitter is adapted to alter the quality factor by changing the series resistance of the switching circuit in its closed state. | 02-18-2016 |
20160056847 | METHOD AND SYSTEM FOR INITIALIZING RF MODULE THROUGH NON-VOLATILE CONTROL - Provided are a method and a system for initializing an RF module through non-volatile control, including: storing, by a non-volatile storage array, configuration information for initializing the RF module, and backing up the configuration information when receiving a power-down instruction (S1); and reading, by an RF module initialization accelerator, the configuration information from the non-volatile storage array when receiving a power-up instruction, and transmitting the read configuration information to the RF module, thereby initializing the RF module (S2). With the technical solution given in the present invention, the initialization of an RF module becomes much faster, and the power consumption of a wireless communication terminal can be reduced. In addition, the initialization of various RF modules can be supported, and meanwhile the hardware resources can be saved, thereby enhancing the extensibility of the system. | 02-25-2016 |
20160088679 | FAST TRANSITION ENVELOPE TRACKING - Envelope power supply circuitry is operated in one of an off-state, a standby-state, and a transmit-state. In the standby-state, select components in envelope power converter circuitry in the envelope power supply circuitry are turned on in order to charge one or more inductive and/or capacitive elements therein to a maximum value necessary for supporting transmission of signals about a maximum output power. Accordingly, the envelope power supply circuitry is able to prepare to support transmission about any output power without knowing the output power ahead of time. | 03-24-2016 |
20160099742 | APPARATUS AND METHODS FOR CALIBRATION OF ENVELOPE TRACKERS - Apparatus and methods for calibration of envelope trackers are provided. In one embodiment, a power amplifier system includes a VGA that amplifies an RF input signal to generate an amplified RF input signal, a power amplifier that amplifies the amplified RF input signal to generate an RF output signal, and an envelope tracker that generates a supply voltage for the power amplifier. The envelope tracker includes a scaling module that generates a scaled envelope signal based on a power control level (PCL) signal and an envelope signal that changes in relation to an envelope of the RF input signal. The envelope tracker further includes a calibration module that controls an amount of scaling of the scaled envelope signal based on calibration data to compensate for an envelope amplitude misalignment of the envelope tracker. The envelope tracker controls the voltage level of the supply voltage based on the scaled envelope signal. | 04-07-2016 |
20160173311 | COMMUNICATION DEVICE WITH POWER AMPLIFIER CREST FACTOR REDUCTION | 06-16-2016 |
20180026677 | PORTABLE FIELD MAINTENANCE TOOL WITH A BUS FOR POWERING AND COMMUNICATING WITH A FIELD DEVICE | 01-25-2018 |