48th week of 2010 patent applcation highlights part 34 |
Patent application number | Title | Published |
20100303098 | AUTO CODE GENERATION TO GENERATE PACKET HEADER GENERATION LIBRARY FOR SWITCH DIAGNOSTICS - Techniques are disclosed for describing packet headers in a format that can be used by a code generation tool to generate source code that can generate any type of packet header when compiled and invoked within switch/router firmware. Such packet headers may then be used in a variety of switch diagnostic/testing functions. A code generation tool may be configured to receive a description of a packet header in the description format. The packet description language provides an easily used approach for defining fields in a packet header. Further, the code generation tool may be configured to generate packet header library for use by firmware on a network device, e.g., for testing and diagnostic functions. | 2010-12-02 |
20100303099 | POINT-TO-POINT COMMUNICATIONS SYSTEMS PARTICULARLY FOR USE IN POWER DISTRIBUTION SYSTEM - A point-to-point communications system ( | 2010-12-02 |
20100303100 | Method and System for Synchronizing a Group of End-Terminals - A method is described for synchronizing the transmission of a stream to a group of end-terminals. The method is used in a system comprising a station transmitting a packetized stream over a network to at least a first and second network node. Each network node comprises a variable delay unit and each network node is connected to one or more end-terminals. In the method the synchronization unit receives arrival time information of a packet in the broadcast stream at the first and second network node. Delay information is calculated for the first and second network node on the basis of the arrival time information of the packet. Further, the delay information is transmitted to the first and second network node so that the variable delay unit in the first and second network node is able to transmit the broadcast stream to the first and second end-terminal in a substantially synchronized way. | 2010-12-02 |
20100303101 | REAL-TIME TIME ENCODING AND DECODING MACHINES - Methods for decoding a signal encoded by a Time Encoding Machine (TEM) include defining a plurality of time-windows, each time-window corresponding to a portion of a TEM-encoded signal and made up of a plurality of trigger values, at least two of the time-windows overlapping, decoding each of the time-windows using a Time Decoding Machine (TDM) to generate a decoded time-window, and stitching the decoded time-windows together to generate a TEM-decoded signal. | 2010-12-02 |
20100303102 | OPTICAL FIBER COMPONENT AND OPTICAL MODULE USING THE SAME - An optical fiber component comprises an optical fiber that transmits light; and a coreless fiber that is connected to the end surface of the optical fiber and prevents foreign matter from adhering to the end surface of the optical fiber. The optical fiber and the coreless fiber are connected by fusing one end surface of the coreless fiber to the end surface of the optical fiber. The core section on the end surface of the optical fiber is no longer exposed to the air. Moreover, the power density of light that is input at the core of the optical fiber is greatly reduced more than when there is no coreless fiber, so it is possible to prevent compounds of C, H and O from adhering to the core of the optical fiber. | 2010-12-02 |
20100303103 | FIBER LASER DEVICE - An object of the invention is to provide a fiber laser device capable of stabilizing intensity of laser light output therefrom. | 2010-12-02 |
20100303104 | Apparatus and Method for Removing Unwanted Optical Radiation from an Optical Fiber - Apparatus comprising a source of optical radiation ( | 2010-12-02 |
20100303105 | GENERATING PULSE TRAINS IN Q-SWITCHED LASERS - The invention relates to methods and systems for generating a pulse train having several individual pulses, wherein the individual pulses have a desired pulse characteristic, by means of a Q-switched solid state laser system, which includes, e.g., a modulator for influencing the pulse characteristic of the individual pulses. The methods include (a) generating individual pulses of a pulse train, each pulse having a pulse characteristic, by applying a temporal initial modulation signal; (b) detecting the pulse characteristic of the individual pulses of the generated pulse train; (c) generating a modified modulation signal in correlation to the detected and the desired pulse characteristic of the individual pulses of the pulse train, and applying the modified modulation signal to the modulator to generate a pulse train with a modified pulse characteristic; (d) repeating step (c) until the modified pulse characteristic fulfills a predetermined termination criterion and then using the modified modulation signal as an optimum modulation signal; and (e) generating a pulse train with the desired pulse characteristic of the individual pulses thereof by applying the optimum modulation signal. | 2010-12-02 |
20100303106 | Ultra-short pulse laser system and method for producing femtosecond or picosecond pulses - An ultra-short pulse laser system comprising an amplifying laser medium for producing a laser emission, a laser resonator having at least one resonator mirror and a pump source has a gas-filled section with a filling gas, the latter consisting of a single gas or a filling gas mixture differing from the composition of air, whose nonlinear refractive index n | 2010-12-02 |
20100303107 | Methods for Obtaining Stabilized Output Beams from Frequency Converted Light Sources and Frequency Converted Light Sources Utilizing the Same - A method for operating a frequency converted light source includes sweeping a wavelength control signal of a semiconductor laser over an initial signal range and measuring an optical power of an output beam emitted from a wavelength conversion device coupled to the semiconductor laser. The wavelength control signal of the semiconductor laser may then be swept over at least one truncated signal range and the optical power of the resulting output beam is measured. The at least one truncated signal range may be centered on a point corresponding to a maximum power of the output beam of the sweep of the wavelength control signal over the preceding signal range. An operational signal range for the wavelength control signal is determined such that a midpoint of the operational signal range corresponds to the maximum optical power of the resulting output beam of the sweep over the preceding signal range. Closed-loop feedback control of the wavelength control signal in the operational signal range may then be initiated. | 2010-12-02 |
20100303108 | WAVELENGTH CONVERTING ELEMENT AND WAVELENGTH CONVERTING LASER APPARATUS - A wavelength converting element that is of a planar waveguide type, includes a plate-like nonlinear optical material, and performs a wavelength conversion on a fundamental wave of a laser beam by propagating the fundamental wave in a plurality of laser oscillation modes in a direction perpendicular to a main surface of the plate-like nonlinear optical material, the direction being perpendicular to an optical axis, wherein periods of polarization inversions of the nonlinear optical material are changed so that each of the periods has a width of a phase matching band A that includes phase matching conditions of at least two of the plurality of laser oscillation modes and so that a non-polarization-inversion region and a polarization inversion region are formed in the nonlinear optical material. | 2010-12-02 |
20100303109 | Proximity Coupled Athermal Optical Package Comprising Laser Source And Compound Facet Wavelength Conversion Device - Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source and a wavelength conversion device. The laser source is positioned such that the output face of the laser source is proximity-coupled to a waveguide portion of the input face of the wavelength conversion device. The input face of the wavelength conversion device comprises an α-cut facet and β-cut facet. The α-cut facet of the input face is oriented at a horizontal angle α, relative to the waveguide of the wavelength conversion device to permit proximity coupling of the output face of the laser source and the input face of the wavelength conversion device. The β-cut facet of the input face is oriented at a horizontal angle β, relative to the waveguide of the wavelength conversion device to cooperate with the horizontal tilt angle of the device to reduce back reflections from the input face of the wavelength conversion device into the laser source. Additional embodiments are disclosed. | 2010-12-02 |
20100303110 | Edge Bonded Optical Packages - Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source subassembly comprising a laser base and a wavelength conversion device subassembly comprising a converter base. The bonding interface of the laser base is bonded the complementary bonding interface of the converter base such that the laser output face can be proximity-coupled to the converter input face at an predetermined interfacial spacing x. Additional embodiments are disclosed and claimed. | 2010-12-02 |
20100303111 | PAIR OF OPTICALLY LOCKED SEMICONDUCTOR NARROW LINEWIDTH EXTERNAL CAVITY LASERS WITH FREQUENCY OFFSET TUNING - An optical phase lock loop (OPLL) system is disclosed that includes a master external cavity laser (ECL), and a substantially identical slave ECL. The master and slave ECLs are fabricated using a planar semiconductor device with waveguide-integrated planar Bragg gratings (PBG). Both the master and slave ECLs have a narrow linewidth and a low frequency-noise. Each of the ECLs has their own controller-modulator circuits for thermal tuning or electrical tuning via direct modulation. A laser-select-logic (LSL) module receives and processes a filtered phase error signal from a loop filter coupled to an electronic PLL device, and directs the processed phase error signal to one or both of the master and slave controller-modulators according to a logical determination of a required mode of operation of the OPLL system in order to achieve a stable and identical phase performance of the master and the slave ECLs. The required mode of operation is chosen from a locking mode, a prediction mode, a tracking mode, and a searching mode. | 2010-12-02 |
20100303112 | SOLID-STATE LASER ELEMENT - To achieve a solid-state laser element capable of outputting a high-power laser, in a planar waveguide type solid-state laser element that causes a plurality of fundamental laser beams to oscillate in a direction of an optic axis within a flat plate-like laser medium, and forms a waveguide structure in a thickness direction of the laser medium, which is a direction perpendicular to a principal surface of the flat plate-like laser medium, the laser medium is separated in a principal-surface width direction of the laser medium, which is a direction perpendicular to the direction of the optic axis and the thickness direction of the laser medium, by a groove extending in the direction of the optic axis within the laser medium. | 2010-12-02 |
20100303113 | Multibeam Arrays of Optoelectronic Devices for High Frequency Operation - A VCSEL array device formed of a monolithic array of VCSELs and short circuited mesas is disclosed. The VCSELs can be spaced symmetrically or asymmetrical, in a manner to improve power or speed, or in phase and in parallel. The VCSELs are connected to a first metal contact pad formed on a heat-spreading substrate. The short-circuited mesas are formed alongside the VCSELs and are bonded to and form a short circuit to a second metal contact pad on the grounding substrate. Each VCSEL is encompassed by a thick metal heat sink to increase the height of VCSEL mesas. The structure of the heat sink, the VCSELs and the shorting mesas reduce parasitic impedance thereby increasing output power and high frequency response. The VCSELs and shorting mesas can be packaged as a coplanar waveguide in a ground-signal-ground configuration that improves signal modulation characteristics. | 2010-12-02 |
20100303114 | SEMICONDUCTOR LASER - The invention provides a semiconductor laser realizing reduction in an internal loss of light without thickening a cladding layer. The semiconductor laser includes a semiconductor layer on a semiconductor substrate. The semiconductor layer has, in order from the semiconductor substrate side, a lower cladding layer, an active layer, an upper cladding layer, and a contact layer, and has a first low-refractive-index layer having a refractive index lower than that of the upper cladding layer between the upper cladding layer and the contact layer. | 2010-12-02 |
20100303115 | METHOD FOR MANUFACTURING SEMICONDUCTOR LASER DIODE - A method for manufacturing an LD is disclosed. The LD has a striped structure including an optical active region. The striped structure is buried with resin, typically benzo-cyclo-butene (BCB). The method to form an opening in the BCB layer has tri-steps etching of the RIE. First step etches the BCB layer partially by a mixed gas of CF | 2010-12-02 |
20100303116 | SEMICONDUCTOR LASER DEVICE AND OPTICAL APPARATUS EMPLOYING THE SAME - This semiconductor laser device includes a semiconductor element layer having an active layer and a cavity facet and a facet coating film arranged on the cavity facet, while the facet coating film includes an oxide film made of hafnium silicate (HfSiO) or hafnium aluminate (HfAlO), and the facet coating film further has a nitrogen-containing film, in contact with the cavity facet, between the cavity facet and the oxide film. | 2010-12-02 |
20100303117 | SURFACE EMITTING LASER - The present invention provides a surface emitting laser having a novel structure which eliminates necessity to provide a low refractive index medium at an interface of a photonic crystal layer on the side of a substrate. A multilayer mirror ( | 2010-12-02 |
20100303118 | Semiconductor laser device - A semiconductor laser device has structure including: a semiconductor laser chip having an emission surface and a reflection surface which are opposing end surfaces of a resonator; and a photodiode for detecting light that exits from the reflection surface side, the photodiode being used in a wavelength band where a sensitivity of the photodiode rises as a wavelength lengthens, in which the emission surface has a first dielectric multilayer film formed thereon and the reflection surface has a second dielectric multilayer film formed thereon, and in which, when a wavelength at which a reflectance of the first dielectric multilayer film peaks is given as λ | 2010-12-02 |
20100303119 | Microfluidic Lasers - The present invention generally relates to lasers comprising fluidic channels, such as microfluidic channels. In some instances, the channel contains two or more fluids. The fluids may remain non-mixed within the channel, for example, due to immiscibility and/or laminar flow within the channel. The fluids may be arranged in the channel such that light propagating in a first fluid is prevented by the second fluid from exiting the first fluid, for example, due to differences in the indexes of refraction (e.g., causing internal reflection of the fluid to occur). Thus, in one embodiment, a first fluid may be at least partially surrounded by a second fluid having a second index of refraction lower than the index of refraction of the first fluid. In some embodiments, the fluidic channel is used as a laser, for instance, a dye laser, i.e., a laser created by directing light at a dye to produce coherent light. The dye may be present in one or more fluids within the fluidic channel. The incident light (for example, created by another laser) may be directed at the channel from any angle. In some cases, laser light may be produced in a direction substantially aligned with the longitudinal axis of the channel. In some embodiments, the laser is free of mirrors, prisms, or gratings, or the laser may produce coherent light using a non-resonant photonic pathway. However, in other cases, mirrors, prisms, or gratings may be used to reflect light along the channel to enhance stimulated emission of coherent light. Another aspect of the invention includes optical diffractors, such as prisms or gratings, which can contain a fluid. The optical diffractors, in certain embodiments, are positioned to diffract light, such as coherent light, emanating from the fluidic channel. Still other aspects of the invention provide devices, kits, and methods of making and using such lasers. | 2010-12-02 |
20100303120 | SOLID-STATE LASER ELEMENT - To suppress the amplification of spontaneous emission light in a principal plane width direction to thereby suppress a gain in directions other than a beam axis direction and output a high-power laser, in a solid-state laser element of a plane waveguide type that causes a fundamental wave laser beam to oscillate in a beam axis direction in a laser medium of a flat shape and forms a waveguide structure in a thickness direction as a direction perpendicular to a principal plane of the flat shape in the laser medium, inclined sections | 2010-12-02 |
20100303121 | ACHIEVING LOW PHASE NOISE IN EXTERNAL CAVITY LASER IMPLEMENTED USING PLANAR LIGHTWAVE CIRCUIT TECHNOLOGY - The present invention relates to external cavity laser (ECL) apparatuses and manufacturing processes, and more particularly to implementing low noise narrow bandwidth ECLs on planar lightwave circuit (PLC) platforms for harnessing high-performance, high-stability operation from a compact-footprint, low-power packaged device. An ECL device with narrow linewidth and low noise is disclosed, the device comprising a PLC device and a gain chip butt-coupled to each other. The PLC device has a planar Bragg grating (PBG) integrated onto a rectangular waveguide. The PLC device has anti-reflection coatings (ARC) on its input facet and output facet. The waveguide is designed to be selective of a single polarization. The gain chip has high-reflection coating (HRC) on a back facet and an ARC on a front facet. An operating wavelength of the ECL is aligned to a longer wavelength red slope of a reflectivity spectrum of the PBG. The operating wavelength may be tuned thermally, electrically, or thermo-electrically. | 2010-12-02 |
20100303122 | CAVITY DYNAMICS COMPENSATION IN RESONANT OPTICAL MODULATORS - Disclosed are resonant optical modulators, and methods of use thereof, that achieve constant photon populations in the resonator by simultaneously modulating at least two variable modulation parameters. | 2010-12-02 |
20100303123 | COMPACT OPTICAL RESONATORS - Various embodiments of the present invention are directed to compact, sub-wavelength optical resonators. In one aspect, an optical resonator comprises two approximately parallel reflective structures positioned and configured to form a resonant cavity. The resonator also includes a fishnet structure disposed within the cavity and oriented approximately parallel to the reflective structures. The resonant cavity is configured with a cavity length that can support resonance with electromagnetic radiation having a fundamental wavelength that is more than twice the cavity length. | 2010-12-02 |
20100303124 | TOP LOADED TWIN CELL CALORIMETER SYSTEM WITH REMOVABLE REFERENCE - A measured system for use with a calorimeter and related methods of operation. | 2010-12-02 |
20100303125 | CALORIMETER - A calorimeter which includes a casing in which a sample is combusted, a jacket around the casing, and temperature sensors in an outer surface of the jacket. | 2010-12-02 |
20100303126 | Signal Modulation Method - The present invention provides a signal modulation method which includes the following steps: a input signal is channel encoded, and the channel encoded signal is processed by the following one or several ways: channel scrambling, interleaving, duplicating and puncturing; the signal being processed is divided into two components I and Q, wherein the two components I and Q compose a signal pair; the signal pair is divided into more than one path, and respective path of signal is quadrature phase shift keying spectrum spreading modulated using different spectrum spreading sequence and is orthogonally modulated in order that the peak-to-average power ratio of the respective paths of signal being orthogonally modulated are obtained; and a path of signal having the smallest peak-to-average power ratio is selected to be outputted as an output signal. The signal modulation method can reduce the signal PAPR significantly, not only is propitious to the design of the power amplifier, but also reduces the cost of the power amplifier. | 2010-12-02 |
20100303127 | Vehicle compartment wireless communications apparatus - It is determined whether each of several subcarriers has an adequate propagation characteristic in a first horizontally polarized wave antenna. Of the several subcarriers, a subcarrier, which is determined to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is assigned with transmission data. A transmission signal containing the transmission data is thereby transmitted from the first horizontally polarized wave antenna. In addition, of the several subcarriers, a subcarrier, which is determined not to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is also assigned with transmission data in either a second horizontally polarized wave antenna or a vertically polarized, wave antenna. A transmission signal containing the transmission data is thus transmitted from the second horizontally polarized wave antenna or the vertically polarized wave antenna. | 2010-12-02 |
20100303128 | AGGREGATING LOWER BANDWIDTH ASYNCHRONOUSLY CLOCKED COMMUNICATION LINKS INTO A HIGHER BANDWIDTH LINK - A spread spectrum generator module is configured to provide data for spreading frequency spectra of at least first and second lower bandwidth asynchronously clocked communication links. A packet scheduling module aggregates the two (or more) lower bandwidth links into a higher bandwidth link or interface. The frequency spectra of the lower bandwidth links are spread in accordance with the data for spreading the frequency spectra. A downstream disaggregation element filters high frequency noise resulting from the spreading of the spectra. | 2010-12-02 |
20100303129 | FREQUENCY HOPPING METHOD FOR LOCALIZATION SYSTEM - A frequency hopping method for localization system is aimed to overcome the degradation of location accuracy due to radio interference if there are some other radio devices using the same radio frequency as a localization system. A Packet Reception Rate (PRR) thresholding or a learning-based approach for the diagnostic test is proposed. In that, a PRR thresholding or a set of parameters trained by Hidden Markov Model (HMM) is used as a criterion to decide whether or not to hop. The proposed hopping mechanism provides an accurate and stable localization with a minimum delay. | 2010-12-02 |
20100303130 | BASEBAND PROCESSOR AND WIRELESS DEVICE - A baseband processor includes a modulating unit and a converting unit. The modulating unit generates an orthogonal frequency division multiplexing (OFDM) symbol by modulating a bit stream. The converting unit converts the OFDM symbol from a frequency domain into a time domain, and adjusts a frequency of the OFDM symbol according to a frequency hopping sequence to perform frequency hopping in a digital domain. | 2010-12-02 |
20100303131 | LOW-RATE LONG-RANGE MODE FOR OFDM WIRELESS LAN - A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each of a plurality of subcarriers and a spreading module for spreading out the symbol on each of the plurality of subcarriers by using a direct sequence spread spectrum. The symbol on each of the plurality of subcarriers is spread by multiplying the symbol by predefined length sequences. The receiver includes a de-spreader module for de-spreading the symbols on each of the plurality of subcarriers. The de-spreader module includes a simply correlator receiver for obtaining maximum detection. The correlator produces an output sequence of a same length as an input sequence and the de-spreader module uses a point of maximum correlation on the output sequence to obtain a recovered symbol. | 2010-12-02 |
20100303132 | Method and Apparatus for Allocating Processing Delays in Multi-Carrier Systems - A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a dispersion determined for each carrier. The receiver initially allocates a minimum number of processing delays sufficient for light dispersion to each carrier. For the dispersive carriers, the receiver allocates one or more additional processing delays. In one embodiment, the additional processing delays are allocated to the dispersive carriers based on SIR. | 2010-12-02 |
20100303133 | VEHICLE-MOUNTED RELAY CONNECTION UNIT - A message is efficiently relayed in a cut-through mode to a communication line of the transmission destination of a transmission rate higher than that of the communication line of the recipient while preventing the state that there is no data to be transmitted. A vehicle-mounted relay connection unit is used to relay messages received through first CAN communication lines to a second CAN communication line of a transmission rate higher than that of the first transmission lines in a cut-though mode. A relaying section measures the time difference between the time when the reception of the control field of a message among the messages simultaneously received through the first CAN communication lines is completed earliest and the time when the reception of the control field of another message is completed, determines the transmission waiting time from the completion of the reception of the control field of each message, and first relays the message such that the sum of the transmission waiting time and the time difference of the reception completion is small to the second CAN communication line. | 2010-12-02 |
20100303134 | WIRELESS RELAY DEVICE AND WIRELESS RELAY METHOD - A device and a process which enable use of transmission diversity in transmission to a receiving station when wirelessly relaying wireless signals from a transmitting station to the receiving station. A reception antenna RA in a wireless relay device (RS) receives from the transmitting station such as a base station (BS) a signal in which data signals are respectively allocated to carriers at adjacent radio frequencies. The wireless relay device performs space frequency block coding (SFBC) of the received signal. Then, the wireless relay device transmits SFBC-encoded signals through two transmission antennas SA | 2010-12-02 |
20100303135 | METHOD AND APPARATUS FOR DIRECT RF TO DIGITAL CONVERTER - The invention relates to a method and apparatus for decomposing a high frequency incoming signal into several low frequency signals without the loss of any information. The low frequency signals can define a plurality of digital data streams. The decomposing steps are implemented without processing the signal through a mixer or a local oscillator and without degrading the SNR. In a preferred embodiment, a decomposing circuit includes a single-to-differential converter for decomposing the incoming high frequency signal into a first and a second signal having opposite polarity. Each of the first and the second incoming signals is then processed through multistage cascading logic units which reduce the frequency of the respective signals to provide a plurality of low-frequency data streams. The resulting slow-speed data streams are combined to form a low-speed data stream containing all the information provided by the original high-frequency signal. | 2010-12-02 |
20100303136 | Channel Estimation in a Multi-Channel Communication System Using Pilot Signals Having Quasi-Orthogonal Subpilots - An access node of a communication system comprises a plurality of transmitters adapted for communication with at least one receiver. The access node is operative to transmit pilot signals from respective associated ones of the transmitters, to estimate channel coefficients between the transmitters and the receiver, and to utilize the estimated channel coefficients to control at least one data signal sent by at least one of the transmitters. The pilot signals are partitioned into a plurality of sets of pilot signals such that pilot signals from the same set have respective subpilots that are orthogonal to one another and pilot signals from different sets have respective subpilots that are not orthogonal to one another but are instead quasi-orthogonal to one another. The pilot signals are associated with the respective transmitters based on the partitioning of the pilot signals into sets. | 2010-12-02 |
20100303137 | CABLE MODEM AND CONNECTION RETAINING METHOD - A cable modem in communication with a cable modem termination system (CMTS) scans and tries to lock onto a primary channel, tries to receive a media access control domain description (MDD) message includes subsidiary channels from the CMTS if the primary channel is locked, and tries to lock onto the subsidiary channels in the received MDD message. The cable modem further retains the cable modem to work with the DOCSIS 3.0 standard upon the condition that the primary channel and the subsidiary channels are all locked or retains the cable modem to work with the DOCSIS 2.0 standard upon the condition that the MDD message is not received or the subsidiary channels are not successfully locked. | 2010-12-02 |
20100303138 | Intrinsically Safe DSL Circuit - An electrical installation comprising control and/or monitoring means connected to a field device by means of an electrical communications circuit, in which the communications circuit comprises a power supply, a communications device, the field device as a load thereof, and Intrinsic Safety means, in which the communications device is adapted to send and receive signals over the communications circuit to and from the field device, in which the field device is adapted to send and receive signals over the communications circuit to and from the communications device, in which the Intrinsic Safety means renders all or part of the communications circuit Intrinsically Safe, in which the field device is located in an Intrinsically Safe part of the communications circuit, characterised in which the communications circuit is adapted to carry DSL signals, and in which the communications device and the field device communicate with one another according to the DSL protocol. | 2010-12-02 |
20100303139 | METHOD AND APPARATUS FOR MEASURING SIGNAL PHASE SHIFTS - A method and an apparatus for measuring a phase shift between a first and a second signal, comprising the steps of shifting the first signal in frequency by an offset frequency, superposing the frequency-shifted first signal and the second signal, determining an envelope signal of the superposed signal, and measuring a phase shift of the envelope signal at the offset frequency, or a multiple thereof, with respect to the phase of the offset frequency, wherein the phase shift is measured by determining a Fourier coefficient of the envelope signal at the offset frequency and extracting its phase. The invention further relates to an apparatus implementing the method. | 2010-12-02 |
20100303140 | SNR estimation system for multi-carrier communication - A signal to noise power ratio estimation system for multi-carrier communication includes a phase rotator, a power estimator, a channel gain calculator, an average and selection device, a combination and calculation device and a decibel (dB) transformation device. The signal to noise power ratio estimation system makes use of a transmit parameter signaling or pilot subcarriers to blindly assist in the signal to noise power ratio estimation to accordingly gain an estimated signal to noise power ratio accurately, and thus a communication system can be calibrated to a preferred condition. | 2010-12-02 |
20100303141 | APPARATUS AND METHOD FOR RECEIVING SIGNAL USING RAKE RECEIVER AND EQUALIZER IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for selecting a receiver for demodulating a reception signal at a reception end having a plurality of receivers are provided. The method includes determining, a mean and a standard deviation of Signal-to-Noise Ratios (SNRs) of the receivers are determined, estimating a Doppler frequency, determining a statistical value of a modulation order of subframes received in advance, determining SNR estimation values of the receivers based on the determined mean and standard deviation of the receivers, the estimated Doppler frequency, and the determined statistical value of the modulation order of the received subframes, selecting one receiver having a largest SNR estimation value among the determined SNRs of the receivers, and demodulating a reception signal using the selected receiver. | 2010-12-02 |
20100303142 | System and Method for Pre and Post-Tap Zeroing - A system and method are provided for zeroing pre and post-tap settings in a link partner using a plurality of voltage gain taps. The method provides a link partner (LP) transmitter. A network-connected local device (LD) selects an LP pre-tap or post-tap. The LD also chooses a zero gain setting for the selected LP tap. In a first iteration, the LD directs the LP to decrease the difference between the selected tap gain setting and the zero setting by 1 step. If a limit signal is not received by the LD, the LP is directed to maximally increase the center tap gain setting until a limit signal is received. The iterations are continued until a limit signal is returned in response to the LD directing the LP to decrease the difference between the selected tap gain setting and the zero setting. | 2010-12-02 |
20100303143 | SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD - Provided is a signal processing apparatus including: an equalizer circuit that amplifies a predetermined frequency band of an input signal and outputs an output signal; a sampler circuit that samples the output signal amplified by the equalizer circuit with the output signal being offset in an amplitude direction using a multiphase clock system; an area information calculation circuit that calculates area information of an eye opening in an eye diagram of the output signal based on the output signal sampled by the sampler circuit; and a control circuit that controls amplification of the equalizer circuit based on the area information of the eye opening calculated by the area information calculation circuit. | 2010-12-02 |
20100303144 | ARCHITECTURE FOR VERY HIGH-SPEED DECISION FEEDBACK SEQUENCE ESTIMATION - A method for providing a next-cycle input sample from a decision feedback equalizer to a symbol decoder using look-ahead computations such that timing contention between the decision feedback equalizer and the symbol decoder is reduced. During a symbol period, a set of possible values is computed in the decision feedback equalizer and a set of path memory symbols is computed in the symbol decoder, the set of path memory symbols being based on a current input sample. During the same symbol period, one of the possible values is selected as the next-cycle input sample based on at least one of the next-cycle path memory symbols produced from the symbol decoder. | 2010-12-02 |
20100303145 | MEDIA GATEWAY WITH OVERLAY CHANNELS - A network media gateway is disclosed with a processor configured to include a plurality of decoder channels, a plurality of overlay channels, an overlay renderer, a video mixer, and an encoder channel. A digital signal processor embedded in a network media gateway is also disclosed, and a mixing method implemented on a digital signal processor is also disclosed. | 2010-12-02 |
20100303146 | MECHANISM FOR DYNAMICALLY CHANGING STREAMING VIDEO QUALITY - Method and apparatus for dynamically changing streaming video quality are described herein. In one embodiment, a network traffic condition of a network and a local processing bandwidth of a client are periodically determined. A data compression method and/or compression rate is dynamically selected that is most appropriate to transmit a video frame to the client over the network in view of the determined network traffic condition and the local processing bandwidth of the client. The video frame is then compressed using the selected compression method and/or compression rate and sent over to a client to be rendered at the client. | 2010-12-02 |
20100303147 | ENCODING APPARATUS AND ENCODING METHOD, AND DECODING APPARATUS AND DECODING METHOD - An encoding apparatus includes a receiving section receiving syntax information defined by an encoding standard, a first encoding section encoding the received syntax information to generate encoded information, a transferring section transferring transmission encoded information based on the encoded information generated by the first encoding section, a second encoding section encoding reproduced encoded information reproduced from the transferred transmission encoded information, a conversion section converting the encoded information encoded by the first encoding section into redefined encoded information, to generate the transmission encoded information in accordance with the transfer capacity of the transferring section and the processing speed of encoding in each of the first encoding section and the second encoding section so as not to cause delay in encoding in the first encoding section or the second encoding section, and an inverse conversion section inversely converting the converted redefined encoded information to generate the reproduced encoded information. | 2010-12-02 |
20100303148 | MACROBLOCK-BASED DUAL-PASS CODING METHOD - The method comprises the following steps:
| 2010-12-02 |
20100303149 | VIDEO ENCODING/DECODING APPARATUS - An image processor to produce a local decoded image corresponding to an input image, a region partitioning module to classify the local decoded image into a plurality of regions using a given parameter, a filter designing module to design a filter coefficient for every classified region, a filter processor to filter the local decoded image according to a corresponding filter coefficient for every classified region, a frame memory to store a filtered image, a predictor to produce a prediction image using a stored image, and an encoder to output a parameter used for classification of the region and information of a filter coefficient every classified region as encoded data are provided. | 2010-12-02 |
20100303150 | SYSTEM AND METHOD FOR CARTOON COMPRESSION - A system, specialized for encoding video of animated or cartoon content, encodes a video sequence. The system includes a background analyzer that removes moving objects from a series of video frames and generates a background definition for a static background used in a plurality of sequential video frames, a color clusterer that analyzes the colors contained in a video stream and creates a major color list of colors occurring in the video stream, an object identifier that identifies one or more objects that are constant within a series of video frames except for their position and rotational orientation within the series of video frames, and a hybrid encoder that encodes backgrounds and objects derived from a video sequence according to one of a plurality of encoding techniques depending on the compression achieved by each of the plurality of encoding techniques. | 2010-12-02 |
20100303151 | Method for decoding video signal encoded using inter-layer prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_prediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame. | 2010-12-02 |
20100303152 | Method And System For Decoding Digital Video Content Involving Arbitrarily Accessing An Encoded Bitstream - A technique for decoding an encoded bitstream of digital video content involves decoding a bitstream, wherein decoding the bitstream generates decoded syntax elements and decoded pixel information, creating an access point in the currently decoded bitstream by saving state information related to the decoding, saving the decoded syntax elements, and saving the decoded pixel information, and synchronizing a subsequent decoding operation to the access point utilizing the saved state information, the saved decoded syntax elements, and the saved decoded pixel information. | 2010-12-02 |
20100303153 | PICTURE CODING METHOD AND PICTURE CODING APPARATUS - A picture coding apparatus that reduces a computational complexity, improves a compression rate, and reduces frequency of stream transmission loss without interfering with pipelining and paralleling includes: a dividing unit that divides a picture into an I-slice and a P slice, each of the I-slice and P slice including blocks; and a coding unit that codes each slice per block so as to code temporally consecutive pictures, wherein the dividing unit changes a position of the I-slice in each of the temporally consecutive pictures so that positions of I-slices circulate in a to-be-determined number of pictures among the temporally consecutive pictures, and divides each of the temporally consecutive pictures so that a sum of the number of blocks included in the I-slice and the number of blocks included in one or more P slices between the I-slice and an I-slice subsequent to the I-slice becomes a predetermined value. | 2010-12-02 |
20100303154 | METHOD AND DEVICE FOR VIDEO SEQUENCE DECODING WITH ERROR CONCEALMENT - The invention concerns a method for decoding a video sequence encoded according to a predictive format, which video sequence includes predicted images containing encoded residual data representing differences between the respective predicted image and a respective reference image in the video sequence. | 2010-12-02 |
20100303155 | IMAGE CODING DEVICE, IMAGE CODING METHOD, IMAGE CODING INTEGRATED CIRCUIT AND IMAGE CODING PROGRAM - An image coding device ( | 2010-12-02 |
20100303156 | Method and Apparatus for Providing Precise Transport Stream Packet Ordering and Erasure Optimization for Digital Video Decoder - One method includes estimating, by a lost packet determination logic, an expected number of packets, expected to be received within a time interval, based on packet arrival speed; and determining a number of lost packets by using the expected number of packets and a packet counter wherein the packet counter counts a plurality of received packets. The method may further include comparing the expected number of packets to the packet counter and determining that the expected number of packets is greater than the packet counter; and then using the expected number of packets and the packet counter to determine the actual number of lost packets, where the actual number of lost packets exceeds the packet counter maximum. The methods may also introduce erasures when there is uncertainty of whether some packets or bytes are in error, such that a simplified erasure-based Reed-Solomon decoder may be used. | 2010-12-02 |
20100303157 | SEMICONDUCTOR INTEGRATED CIRCUIT - The present invention is directed to lessen burden at the time of solving a conflict of overlapping processes in processes for a plurality of interruption factors. On completion of data transfer to an external memory, a data transfer completion interruption of high priority is generated. In the case where data transfer of predetermined number of packets is not completed in reception interruption, a timer interruption of low priority is generated. Before processing data in an external memory responding to the interruption, the number of transfer packets is obtained from a counter. After restart of reception, the counter stores the number of transfer restart packets. After obtaining the number of transfer packets from a counter responding to the occurrence of the timer interruption, a data transfer completion interruption is generated. According to the obtained number of transfer packets, execution of either a process responding to occurrence of the timer interruption or a process responding to occurrence of the data transfer completion interruption is omitted. | 2010-12-02 |
20100303158 | METHOD AND APPARATUS FOR SCENE CHANGE DETECTION - An apparatus and method for detecting scene change by using a sum of absolute histogram difference (SAHD) and a sum of absolute display frame difference (SADFD). The apparatus and method use the temporal information in the same scene to smooth out the variations and accurately detect scene changes. The apparatus and method can be used far both real-time (e.g., real-time video compression) and non-real-time (e.g., film post-production) applications. | 2010-12-02 |
20100303159 | APPARATUS AND METHOD FOR SYNCHRONIZING USER OBSERVABLE SIGNALS - An apparatus and method provides synchronization between user observable signals including audio and/or video signals. According to an exemplary embodiment, the apparatus includes an input point for receiving an encoded signal. A circuit time-shifts the encoded signal to generate a time-shifted encoded signal. A first decoder decodes the time-shifted encoded signal to generate a first decoded signal and provides the first decoded signal for a first system. The first system converts the first decoded signal to a first user observable signal. The input point also provides the encoded signal for a second system including a second decoder, an encoder, and a third decoder coupled in series which enables generation of a second user observable signal. The time-shifting performed by the circuit is adjustable and enables the first user observable signal to become substantially synchronized with the second user observable signal. | 2010-12-02 |
20100303160 | MULTIFUNCTIONAL SIGNAL TRANSFORM ENGINE - A technique involves using a fast Fourier transform (FFT) module to transform multiple different types of signals. This may be accomplished using one or more of three techniques: logic within the FFT module can enable different processing depending upon a processing state, the FFT module can be called iteratively to transform a signal that is larger than the FFT implemented in the FFT module, the FFT module can be used for parallel transformation of multiple signals that are smaller than the FFT implemented in the FFT module. Thus, a single FFT module can be used to transform a first type of signal (e.g., WIFI) and a second type of signal (e.g., GPS) if configured according to the technique. | 2010-12-02 |
20100303161 | RECEIVER APPARATUS - A receiver apparatus ( | 2010-12-02 |
20100303162 | MULTI-USERS DETECTING METHOD AND DEVICE OF OFDM TRANSMISSION SIGNAL - Multi-users detecting method and device of OFDM transmission signal include that: a received data sequence is composed of the received signal which is in the position of the time and frequency symbol corresponding to the same data symbol in multi-repeating blocks; the composed repeating channel response sequence array which is corresponding to the received data sequence is determined; the received data sequence is detected to acquire the data symbol information of multi-users by using the composed repeating channel response sequence array. The technical solution can effectively restrain the multi-address interference and the interference between symbols during OFDM transmitting signal and improve the system performance greatly. | 2010-12-02 |
20100303163 | DEMODULATING CIRCUIT, DEMODULATING METHOD, AND RECEIVING SYSTEM - A demodulating circuit includes: a fast Fourier transform circuit which fast Fourier transforms a received signal and outputs a plurality of carrier signals; an output selecting circuit which selects at least two signals from the plurality of carrier signals, the at least two signals including a first signal modulated in accordance with a first modulation method and a second signal modulated in accordance with a second modulation method; an inverse fast Fourier transform circuit which inverse Fourier transforms transmission path characteristic values including a first transmission path characteristic value obtained based on the first signal and a second transmission path characteristic value obtained based on the second signal; and an FFT window control circuit which controls a position of an FFT window based on the inverse Fourier transformed transmission path characteristic values. | 2010-12-02 |
20100303164 | BLOCK SPREADING FOR ORTHOGONAL FREQUENCY DIVSION MULTIPLE ACCESS SYSTEMS - A method of block spreading data, the method comprising the steps of: (a) providing a first input data sequence; (b) forming a periodic extension of the input data sequence to form an extended input data sequence; (c) multiplying the extended input data sequence by a complex number spreading sequence to produce a spread signal sequence; and (d) outputting the spread signal sequence. | 2010-12-02 |
20100303165 | PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR AN OFDM SYSTEM WITH EXCESS DELAY SPREAD - Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands is greater than the cyclic prefix length. This “oversampling” may be achieved by using more pilot subbands in each symbol period or different sets of pilot subbands in different symbol periods. In one example, a first set of pilot subands may be received in a first symbol period, and a second set of pilot subands may be received in a second symbol period. The first set of pilot subands and the second set of pilot subbands may be staggered in frequency. | 2010-12-02 |
20100303166 | Apparatus and Method for Inserting a Cyclic Postfix for a Time-Rotated Symbol in a Communication System - An apparatus and method for inserting a cyclic postfix for a time-rotated symbol in a communication system. In one embodiment, the apparatus includes a time pre-rotation module configured to time shift bits of at least one of ending samples of a symbol to a beginning of the symbol to form a time-rotated symbol. The apparatus also includes an interpolator configured to construct an up-sampled symbol from the time-rotated symbol and a cyclic postfix module configured to insert a cyclic postfix at an end of the up-sampled symbol to form an expanded up-sampled symbol. | 2010-12-02 |
20100303167 | HIERARCHICAL MODULATION SYSTEM AND TRANSMITTER AND METHOD THEREOF - An exemplary embodiment of the present invention proposes a transmitter including a hierarchical modulator. The hierarchical modulator receives, jointed encodes, and maps a high-priority and low-priority bit-stream signals, so as to generate multiple mapping signal, wherein each mapping signal is the summation of a low-priority and high-priority mapping signals. The low-priority mapping signal is the complex number signal on the frequency domain to which part bits of the low-priority bit-stream signal are mapped, and the high-priority mapping signal is the complex number signal on the frequency domain to which part bits of the high-priority bit-stream signal are mapped. The p | 2010-12-02 |
20100303168 | Data Transmission Method for Orthogonal Frequency Division Multiplexing System - A data transmission method for orthogonal frequency division multiplexing system, specifically comprises sending M, which is greater than 1, OFDM symbols included in each data transmission unit with different bandwidth, wherein each data transmission unit with different bandwidth sends two kinds of OFDM symbols with different cyclic prefix lengths: OFDM symbols with the long cyclic prefixes and OFDM symbols with the short cyclic prefixes; and the data transmission units with different bandwidths transmit the identical number of OFDM symbols with the long cyclic prefixes and the identical number of the OFDM symbols with the short cyclic prefixes. | 2010-12-02 |
20100303169 | CHANNEL EQUALIZER AND METHOD OF PROCESSING BROADCAST SIGNAL IN RECEIVING SYSTEM - A channel equalizer includes an overlap unit, an estimator, a calculator, a compensator, and a save unit. The overlap unit overlaps a group of data packets in a broadcast signal. The group data packets include a head, a body, and a tail, and a known data sequence is periodically included in the body. The estimator estimates a CIR of each data region the body using the known data sequence, and it further estimates CIRs of data regions in the head or tail using the CIRs obtained for the data regions in the body. The calculator calculates equalization coefficients based on the CIRs estimated by the estimator, and the compensator compensates channel distortion of the overlapped data using the equalization coefficients. The save unit saves the compensated data. | 2010-12-02 |
20100303170 | METHOD AND APPARATUS FOR PRE-PROCESSING DATA TO BE TRANSMITTED IN MULTIPLE-INPUT COMMUNICATION SYSTEM - A method for pre-processing data to be transmitted in a multiple-input communication system comprises the following steps: generating a beamforming matrix and a pre-coding matrix; combining the beamforming matrix and the pre-coding matrix to generate a weight matrix; and pre-processing the data by using the generated weight matrix. There are also provided a transmitter, a base station, and a communication system using the method. | 2010-12-02 |
20100303171 | SYSTEM AND METHOD PERFORMING QUADRATURE AMPLITUDE MODULATION BY COMBINING CO-SETS AND STRONGLY CODED CO-SET IDENTIFIERS - A method of encoding a stream of data elements is provided which involves splitting the stream of data elements into a first stream and a second stream; encoding the first stream to produce a first encoded stream; performing a constellation mapping using a combination of the first encoded stream and a third stream which is based on the second stream. This may involve defining a signal constellation; defining a plurality of co-sets within the constellation such that a minimum distance between constellation points within each co-set is larger than a minimum distance between any constellation points within the signal constellation; performing said constellation mapping by using the first encoded stream to identify a sequence of co-sets of said plurality of co-sets, and by using the third stream to identify a sequence of constellation points within respective co-sets of the sequence of co-sets identified by said first encoded stream. | 2010-12-02 |
20100303172 | METHODS AND TECHNIQUES FOR 3G CELLULAR TRANSMITTERS - A transmitter operates in different modulation modes to support both GSM/EDGE and WCDMA cellular telephony applications. The transmitter modulates an outgoing signal to produce a complex modulated signal in a first modulation mode and a constant or variable envelope modulated signal in a second modulation mode. A local oscillation generator and mixer operate to up-convert the complex modulated signal to produce a modulated RF signal in the first modulation mode and to up-convert the phase component of the constant or variable envelope modulated signal to an RF phase signal and mix the RF phase signal with the envelope component thereof to produce the modulated RF signal in the second modulation mode. | 2010-12-02 |
20100303173 | CIRCUIT FOR DEMODULATING A PHASE MODULATED SIGNAL - A demodulator is provided for demodulating a phase-modulated data signal. The demodulator includes a phase frequency detector to output a voltage representing a phase difference between a received phase-modulated data signal and a reference clock signal. The voltage is input to first and second phase change detectors, which are provided to measure the phase difference of the phase-modulated data signal during first and second time periods, respectively. | 2010-12-02 |
20100303174 | APPARATUS FOR PROCESSING RECEIVED SIGNAL, METHOD THEREOF, AND METHOD FOR SELECTING MAPPING RULE - An apparatus for processing a received signal, method thereof, and mapping rule selecting method are disclosed, by which radio communications can be smoothly carried out in a receiving terminal ( | 2010-12-02 |
20100303175 | METHOD TO DISCRIMINATE A REAL ECHO PEAK FROM AN ALIASED ECHO PEAK - A method to discriminate a real echo peak from an aliased echo peak comprises: computing ‘a correlation between N samples of a digital data and a copy of the same N samples delayed by a time delay Δ | 2010-12-02 |
20100303176 | METHODS AND APPARATUSES FOR MIMO DETECTION - Methods and apparatuses are provided for MIMO detection. A method may include considering a symbol vector received over MIMO system. The method may further include generating a list comprising a predefined number of candidate transmit symbol vectors based at least in part upon the received symbol vector using a trellis comprising a plurality of nodes that apply distributed list decoding to generate the list, wherein the list of the predefined number of candidate transmit symbol vectors comprises the predefined number of candidate transmit symbol vectors derived from the set of all possible trellis paths as determined based at least in part upon the respective cumulative trellis path weights. Corresponding apparatuses are also provided. | 2010-12-02 |
20100303177 | Doppler frequency estimation system and method - A Doppler frequency estimation system includes a basis projector, a polynomial generator and an extreme value determinator. The basis projector receives and projects multiple channel sampling signals to a set of orthogonal bases to thereby generate multiple channel correlation vectors. The polynomial generator is connected to the basis projector in order to produce a target polynomial based on the channel correlation vectors, an estimated channel-envelope-to-noise-plus-interference power-ratio and a channel-envelope power. The extreme value determinator is connected to the polynomial generator in order to determine an extreme value of the polynomial and output a frequency corresponding to the extreme value as an estimated Doppler frequency. | 2010-12-02 |
20100303178 | Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same - Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal. | 2010-12-02 |
20100303179 | SYNCHRONIZATION TIMING DETECTING APPARATUS, RECEIVING APPARATUS, AND SYNCHRONIZATION TIMING DETECTING METHOD - A synchronization timing detecting apparatus includes a correlation calculator configured to generate a first correlation value by calculating a cross-correlation between an input signal being sampled and a reference signal or an auto-correlation of the sampled input signal, an interpolation processor configured to generate a second correlation value interpolating a plurality of the first correlation values having a different combination of sampling points of the input signal, and a detector to detect a synchronization timing based on the first and the second correlation values. | 2010-12-02 |
20100303180 | GAIN CONTROL FOR A RECEIVER IN A MULTI-CARRIER COMMUNICATION SYSTEM - A receiver in an OFDM communication system includes a power detector and a gain controller. The power detector detects for total received power of a received OFDM signal, e.g., by computing the power of the data samples from an ADC and averaging the power. The gain controller adjusts the gain of the receiver in discrete gain steps and in one direction, e.g., from the lowest gain state to the highest gain state, based on the detected total received power. The gain controller initializes the receiver to the lowest gain state. Thereafter, the gain controller detects for low total received power, e.g., by comparing the detected total received power against a predetermined threshold. The gain controller transitions to a higher gain state if low total received power is detected and maintains the current gain state otherwise. | 2010-12-02 |
20100303181 | Scalable Satellite Receiver System - A receiver for a multi-channel communication system can include a down-converter device, an analog-to-digital converter (ADC), and a plurality of digital channel selection devices. The down-converter device can be configured to down-convert a plurality of analog signals from the multi-channel communication system to a plurality of corresponding low intermediate frequency (IF) signals. The ADC can be configured to convert the plurality of corresponding low-IF signals to a plurality of digital signals. Further, each digital channel selection device from the plurality of digital channel selection devices can be configured to select a digital signal corresponding to a channel of interest from the plurality of digital signals for further processing. | 2010-12-02 |
20100303182 | WIDEBAND INTERFERENCE MITIGATION FOR DEVICES WITH MULTIPLE RECEIVERS - Certain disclosed embodiments pertain to suppressing interference in a wireless communication system. For example, a method of suppressing interference can include receiving one or more first signals including components from a plurality of sub-channels. Each of the first signals can be converted into a respective plurality of first sub-band frequency components. A respective spatial filter can be determined for each frequency sub-band using one or more corresponding first sub-band components for each respective spatial filter. One or more second signals including components from the plurality of sub-channels can be received. Each of the second signals can be converted into a respective plurality of second sub-band frequency components. A corresponding plurality of filtered sub-band components can be generated by applying the respective spatial filters to the corresponding second sub-band components for each of the second signals. | 2010-12-02 |
20100303183 | Direct detection of wireless interferers in a communication device for multiple modulation types - Direct detection of wireless interferers in a communication device for multiple modulation types. One or more radios implemented within a communication device is/are operative to receive and process wireless communications. A wireless communication signal is processed to extract symbols there from. Various symbols groups are processed in accordance with correlation processing to identify potential interferers (e.g., other communication devices using common portions of frequency spectra). Alternatively, matched filter processing (e.g., using a Barker matched filter in some embodiments) operates on the various symbol groups to identify some potential interferers. Various combinations of correlation processing and matched filter processing may be employed in other instances (e.g., using any of a desired means of comparison, combining, etc.) in considering interferers identified in accordance with each of these two means. Also, re-identification and re-characterization of possible interferers may be performed subsequently to remove or re-admit frequency spectra for use in communications. | 2010-12-02 |
20100303184 | Demodulator and communication apparatus - Disclosed herein is a demodulator, including: a frequency synchronization section adapted to synchronize a frequency of a local oscillation signal to be produced on the demodulator side with a local oscillation frequency of a modulation signal transmitting from a modulator side; a demodulation signal production section adapted to produce a demodulation signal based on the local oscillation signal synchronized by the frequency synchronization section and the modulation signal transmitted from the modulator; and a direct current correction section adapted to detect a direct current voltage of the demodulation signal from the demodulation signal produced by the demodulation signal production section and correct the direct current voltage of the demodulation signal so that the direct current voltage becomes equal to a reference voltage set in advance. | 2010-12-02 |
20100303185 | Methods of Operating Wireless Communications Devices Including Detecting Times of Receipt of Packets and Related Devices - A method of operating a wireless communications device may include determining a wake-up time for a receiver using a low frequency clock. Beginning at the wake-up time, the receiver may listen for reception of a packet transmitted from a remote device over a wireless interface. An actual time of reception of the packet transmitted from the remote device may be detected, and a new wake-up time for the receiver may be determined using the low frequency clock and the actual time of reception of the packet. | 2010-12-02 |
20100303186 | Synchronization circuit, synchronization method, and reception system - Disclosed herein is a synchronization circuit including: a first phase-locked loop circuit; a second phase-locked loop circuit; a first output circuit; a second output circuit; a first detection circuit; a second detection circuit; and a control circuit. | 2010-12-02 |
20100303187 | AUTOMATICALLY SYNCHRONIZING RING OSCILLATOR FREQUENCY OF A RECEIVER - A ring oscillator in a receiver in a multimedia network is adjusted to compensate for factors that may decrease its accuracy over time using a link training signal from a transmitter device in the network. An incoming signal having a known frequency is received at a receiver or sink device from a transmitter, the signal may be a link training signal used for configuring a link between the two devices. In the receiver, an internally generated clock signal is created, the signal having an internal frequency. The incoming signal and the internally generated clock signal are input into a frequency detector which outputs frequency comparison-based data. The internal frequency is based on the comparison-based data such that it is adjusted to be closer to the known frequency of the incoming signal. | 2010-12-02 |
20100303188 | Interactions of Charged Particles on Surfaces for Fusion and Other Applications - A method of generating a chemical and nuclear reactions includes providing a surface formed between a first medium and a second medium, the first medium having a first dielectric constant, ∈, and the second medium having a second dielectric constant, ∈ | 2010-12-02 |
20100303189 | DEVICE FOR INSPECTING A FUEL ROD ASSEMBLY IN THE POOL OF A NUCLEAR PLANT AND CORRESPONDING INSPECTION METHOD - The invention relates to a device for inspecting a fuel assembly in the pool of a nuclear plant, that comprises an image sensor with an observation field, and further comprising a boom with at least one removable fastener to the assembly, a reference graduation extending along an axis parallel to a longitudinal axis of the assembly, so that the image sensor can monitor within its field both the boom and the assembly. The device is designed so that the boom can be removably attached to the fuel assembly when the latter is suspended outside the pool by the hook of the machine for handling the fuel assemblies. The invention also relates to a corresponding method. | 2010-12-02 |
20100303190 | METHOD OF PRODUCING MIXED IN-CORE MAPS AND APPLICATION TO THE CALIBRATION OF FIXED INSTRUMENTATION - The object of the present invention is a method for establishing so-called “mixed IN-CORE mappings”. Its essential purpose is to compensate a loss of density of a reference instrumentation, called “RIC instrumentation” (or “RIC system”), when a significant number of locations, initially used by the sensors of the RIC system, are occupied by fixed collectron-type rods. An obvious physical interest lies in the increase of the measurement density, and thus of the level of confidence, associated with the operating results deduced from the processing of these measurements. One application of the method according to the invention concerns a collectron-type detector calibration method placed inside a nuclear reactor core. | 2010-12-02 |
20100303191 | DRY STORAGE OF SPENT NUCLEAR FUEL - A dry storage of nuclear fuel is disclosed, which comprises: a plurality of nuclear fuel bundles, being arranged in a tight formation; a dry storage canister, formed with a cavity inside to be used for storing the plural nuclear fuel bundles; wherein the cavity is formed with a plurality of blocks of different heights at the top and bottom thereof that each of the blocks on the top and bottom are provided for one of the plural nuclear fuel bundles to mounted fixedly thereon for enabling any neighboring nuclear fuel bundles in the tight formation to be ruggedly arranged with different heights. | 2010-12-02 |
20100303192 | SUPERSAFE AND SIMPLY- / EASILY-DECOMMISSIONABLE NUCLEAR POWER PLANT - The invention relates to an inexpensively-/easily-decommissionable nuclear power plant, where a nuclear isle of one or more nuclear power-stations is installed in caverns, and further, side by side with them, a centre for characterising, treating and conditioning radioactive wastes and two repositories are installed in suitable caverns, with a final repository being adapted to store low-intermediate level nuclear wastes and a temporary repository being adapted to store spent fuel, high-level long-life radioactive materials and, in case, spare nuclear rods for reactor refueling. | 2010-12-02 |
20100303193 | PARTICULATE METAL FUELS USED IN POWER GENERATION, RECYCLING SYSTEMS, AND SMALL MODULAR REACTORS - A metal particulate fuel system is described. The metal fuel system may include particulate metal fuel for use in nuclear reactors. The particulate metal fuel may include a plurality of particles of at least one enriched alloy where the particles are compacted into a fuel column. The metal particulate fuel system may also include a cladding and/or a gas-filled plenum. | 2010-12-02 |
20100303194 | NUCLEAR FUEL ARRANGEMENT IN FUEL POOLS FOR NUCLEAR POWER PLANT - A nuclear fuel arrangement in fuel pools for nuclear power plant is disclosed, which comprises: a plurality of nuclear fuel bundles, being arranged in a tight formation; a pool partition framework, formed with a plurality of grids for storing the plural nuclear fuel bundles; wherein the partition frame has a plurality of blocks of different heights disposed at the bottoms of their corresponding grids to be used for enabling any neighboring nuclear fuel bundles in the tight formation to be ruggedly arranged with different heights. | 2010-12-02 |
20100303195 | GATE DRIVER HAVING AN OUTPUT ENABLE CONTROL CIRCUIT - A gate driver includes a shift register, a logic control circuit, and an output enable control circuit. The shift register generates a plurality of scan signals according to a vertical synchronous signal and a vertical clock signal. The output enable control circuit generates a second output enable signal according to the vertical synchronous signal, the vertical clock signal, and an output enable signal. After the vertical synchronous signal and the vertical clock signal are both triggered together for two times, the second output enable converts from a high level to a low level. The logic control circuit outputs the plurality of scan signals when the second output enable signal is at the low level. | 2010-12-02 |
20100303196 | VOLTAGE MODULATION IN DUAL ENERGY COMPUTED TOMOGRAPHY - To prevent patients from being overexposed or underexposed, it has been attempted to modulate either voltage or current in conventional single energy CT systems. The voltage modulation causes incompatibility in projection data among the views while the current modulation reduces only noise. To solve these and other problems, dual energy CT is combined with voltage modulation techniques to improve the dosage efficiency. Furthermore, dual energy CT has been combined with both voltage modulation and current modulation to optimize the dosage efficiency in order to minimize radiation to a patient without sacrificing the reconstructed image quality. | 2010-12-02 |
20100303197 | X-ray CT apparatus and a method for detecting magnetic pole position thereof - An X-ray CT apparatus includes a fixed gantry having a plurality of stator coils arranged in a circle and mounted on the fixed gantry. A ring-shaped rotation frame of the CT apparatus includes a plurality of rotor magnets facing the plurality of stator coils. The CT apparatus further has an X-ray tube and an X-ray detector situated on the rotation frame to face each other and a supporting unit configured to provide non-contact support of the rotation frame on the fixed gantry. A magnetic pole detection unit of the apparatus is configured to detect a magnetic pole position of the rotor magnet at a start-up time of the plurality of stator coils and a brake mechanism of the apparatus is configured to apply a brake load to the rotation frame when detecting the magnetic pole position and to remove the brake load after detecting the magnetic pole position. | 2010-12-02 |