19th week of 2009 patent applcation highlights part 30 |
Patent application number | Title | Published |
20090116492 | DATA TRANSFER SYSTEM AND METHOD - A transmission source bridge collects packets sent from nodes connected to a serial bus in accordance the IEEE1394 Standards, into one packet in an order they are to be transmitted and then sends them onto an ATM network, so that a transmission destination bridge receives this packet and divides it into a plurality of smaller packets and transfers them, in the order they were sent, to nodes connected to the serial bus in accordance with the IEEE1394 Standards. | 2009-05-07 |
20090116493 | METHOD AND APPARATUS FOR ETHERNET TO BEAR ATM CELLS - A method for an Ethernet to bear ATM cells includes: mapping the ATM virtual connection information in the first ATM cell received from the ATM network to an Interworking Identifier (IW ID); combining the IW ID and the cell payload of the first ATM cell into an Ethernet frame; and transmitting the Ethernet frame in an Ethernet network. An apparatus for an Ethernet to bear ATM cells is also disclosed. The embodiments of the present invention implement network interworking on the data link layer (layer 2) and enable an ATM network to perform ATM emulation in a metropolitan area Ethernet (MEN) independently of the upper-layer protocol, thus facilitating the user. | 2009-05-07 |
20090116494 | Method and System to Transport High-Quality Video Signals - Society of Motion Picture and Television Engineers (SMPTE) video data is separated into first data and second data. A first signal is formed based on the first data. A second signal is formed based on the second data. The first signal is transported via a first Optical Carrier 3 (OC-3) channel. The second signal is transported via a second OC-3 channel. | 2009-05-07 |
20090116495 | Method and Device for Dynamic Management of Quality of Service - A method of dynamically distributing quality of service between users of a network service ( | 2009-05-07 |
20090116496 | SYNCHRONIZING PORTIONS OF A DATABASE WITH DIFFERENT DATABASES ON DIFFERENT NODES OF A NETWORK - Techniques are disclosed for synchronizing a database related to a first node in a network with multiple nodes. Each node includes a database different from a database on a different node. An inquiry control message is sent to each node in a candidate set of one or more nodes on the network, which are different from the first node. In response to the inquiry control message, the first node receives a first set of one or more messages from a particular node different from the first node. The first set indicates a portion from the database of the particular node. The portion is relevant for the first node. A particular portion of a first database for the first node is derived from the first set of messages. The particular portion is less than all of the first database. These techniques allow the first node to derive its full database from multiple adjacent nodes. | 2009-05-07 |
20090116497 | Ethernet Performance Monitoring - One embodiment is a source router that monitors the performance of an Ethernet network. The source router generates an Ethernet connectivity check request frame that includes a transmission timestamp, and transmits the Ethernet connectivity check request frame to a destination router. The source router receives a reply from the destination router that is transmitted in response to receiving the Ethernet connectivity check request frame and determines a round trip time between the source router and the destination router based on a time of receipt of the reply and the transmission timestamp. | 2009-05-07 |
20090116498 | TESTING DATA SERVICE USING MOCA-TO-ETHERNET BRIDGE - A terminal apparatus includes an ethernet channel that transfers ethernet traffic between an ethernet port and an external network port during a normal operation mode of the apparatus, and a Multimedia over Cable Alliance (MoCA) channel that transfers MoCA traffic between a MoCA port and the external network port during the normal operation mode. The terminal apparatus also includes a test system that bridges the ethernet channel and the MoCA channel during a test mode of the apparatus. Ethernet traffic received by the ethernet port is converted to MoCA traffic and transferred to the MoCA port, and MoCA traffic received by the MoCA port is converted to ethernet traffic and transferred to the ethernet port. | 2009-05-07 |
20090116499 | COMMUNICATION APPARATUS, METHOD EXECUTED BY COMMUNICATION APPARATUS, AND STORAGE MEDIUM STORING SOFTWARE FOR EXECUTING METHOD - A communication apparatus which is capable of performing bi-directional communication via a router in a local network including one or more routers is provided. An upper segment determination section ( | 2009-05-07 |
20090116500 | APPARATUS, SYSTEM AND METHOD FOR TRANSFERRING AN ACTIVE CALL BETWEEN WIRELESS COMMUNICATION NETWORKS - An active voice call with an access terminal is transferred from an originating wireless network to a destination wireless network in response to a call continuation message transmitted by the access terminal to a destination network switch of the destination wireless network. The call continuation message includes a connected number indicator identifying the voice call and a call continuation indicator indicating the voice call should be routed through the destination network switch. In some circumstances, an originating network switch of the originating wireless network identifies the voice call to the network switch of the first wireless network to facilitate the transfer. | 2009-05-07 |
20090116501 | METHOD AND DEVICE FOR REALIZING UNICAST REVERSE PATH FOR FORWARDING - A method and device for realizing a unicast reverse path forwarding is disclosed. Information about that a unicast reverse path forwarding (URPF) needs to be implemented is set in a route table item of a network device's route table, the network device implements the URPF on the corresponding message according to the route table item which carries the information about that the URPF needs to be implemented. The information about that URPF needs to be implemented in the network device's route table may be set in a dynamic or static manner, and so on. Therefore, the implementing process of URPF is simplified and the forwarding performance of the network device is improved. | 2009-05-07 |
20090116502 | EFFICIENT TRIPLE MODULAR REDUNDANCY ON A BRAIDED RING - One embodiment comprises a network that includes a plurality of bi-directional links and a plurality of nodes. Each node is communicatively coupled to two neighbor nodes and to two skip nodes using the plurality of bi-directional links. Three neighboring nodes of the plurality of nodes form a triple modular redundant (TMR) set having a first end node, a second end node, and a center node, the first end node configured to transmit output data in a first direction and the second end node configured to transmit output data in a second direction. At least one of the plurality of nodes that is not in the redundant set determines the integrity of data received from the redundant set based on at least: (i) a comparison of data received on a first logical communication channel from a respective first neighbor node with data received on the first logical communication channel from a respective first skip node; (ii) a comparison of data received on a second logical communication channel from a respective second neighbor node with data received on the second logical communication channel from a respective second skip node; and (iii) a comparison of data received on the first logical communication channel from one of the respective first neighbor node and the respective first skip node with data received on the second logical communication channel from one of the respective second neighbor node and the respective second skip node. | 2009-05-07 |
20090116503 | METHODS AND SYSTEMS FOR PERFORMING TCP THROTTLE - The present invention relates to systems and methods of accelerating network traffic. The method includes receiving a plurality of network packets and setting a threshold for a buffer. The threshold indicates a low water mark for the buffer. The method further includes storing the plurality of network packets in the buffer at least until the buffer's capacity is full, removing packets from the buffer, and transmitting the removed packets via a downstream link to an associated destination. Furthermore, the method includes that in response to removing packets from the buffer such that the buffer's capacity falls below the threshold, receiving additional packets and storing the additional packets at least until the buffer's capacity is full. | 2009-05-07 |
20090116504 | PACKET PROCESSING APPARATUS FOR REALIZING WIRE-SPEED, AND METHOD THEREOF - Provided are a packet processing apparatus for realizing a wire-speed, and a method thereof. The packet processing apparatus realizes a wire-speed by making an inputted packet be processed in another packet processing apparatus instead of processing the inputted packet for itself. The packet processing apparatus for realizing a wire-speed by having an inputted packet processed in a packet processor of another packet processing apparatus by making an inputted packet detour a packet processor into a detour path, includes: a packet classifier for classifying and storing the inputted packet in a multi-queue based on a priority; a queue manager for including the multi-queue, determining a detour packet among packets stored in the multi-queue and marking the packet as a detour packet; and a packet scheduler for transmitting the packet designated as the detour packet to the detour path. The apparatus is used for a packet communication system. | 2009-05-07 |
20090116505 | Service Based VLAN Stacking - A device and method are described herein for group profiling traffic (e.g., voice, data, high-speed data, video, multicast stream) which is received at a plurality of incoming ports. In one embodiment, the method includes the steps of: (a) receiving different types of traffic at the plurality of ports; (b) classifying the different types of traffic into different types of service access points; and (c) applying profiles of the different types of service access points to the corresponding different types of traffic, wherein the same type of traffic which is received by at least two ports of the plurality of ports will share the profile of the corresponding classified service access point. | 2009-05-07 |
20090116506 | METHOD COMMUNICATION ARRANGEMENT AND COMMUNICATION DEVICE FOR ESTABLISHING A COMMUNICATION RELATIONSHIP - According to the invention, connection information (vcxIndex) representing each connection (AE | 2009-05-07 |
20090116507 | METHOD AND SYSTEM FOR FACILITATING QUALITY OF SERVICE IN EDGE DEVICES IN A FIBRE CHANNEL NETWORK - One embodiment of the present invention provides a system that facilitates quality of service (QoS) in a Fibre Channel (FC) host bus adaptor (HBA). In this system the bandwidth on an FC link between the HBA and the FC switch can be allocated into a plurality of logical channels, and a respective logical channel can transport data frames of variable length. Furthermore, a respective logical channel is associated with a dedicated buffer. During operation, the HBA communicates to an FC switch the HBA's capability of receiving or sending a data flow over a logical channel that couples the HBA to the FC switch. The HBA further receives logical-channel allocation information from the FC switch. Furthermore, the HBA associates data frames with a logical channel and transmits data frames to the FC switch on the corresponding logical channel. | 2009-05-07 |
20090116508 | APPARATUS FOR AND METHOD OF CONVERTING BIT RATE OF DVB-H SIGNAL - A bit rate converting apparatus suitable for a DVB-H signal which does not have a function of rewriting a PCR value comprises means ( | 2009-05-07 |
20090116509 | Mobile temporary incident area network for local communications interoperability - An ad hoc emergency interoperability communication network is established by providing universal temporary incident area network modules that communicate with each other on an open network, with the network being established when vehicles containing the temporary incident area network modules are within range of each other. | 2009-05-07 |
20090116510 | HIGH FREQUENCY COMMUNICATION DEVICE WITH MINIMAL OFF CHIP COMPONENTS - A high frequency (HF) communication device includes an antenna structure, an integrated circuit (IC), and an off-chip duplexer. The IC includes a receiver section and a transmitter section. The receiver section is operable in a receive portion of a first frequency band to support multiple communication protocols and converts a filtered inbound HF signal into a down converted inbound signal in accordance with the multiple communication protocols. The transmitter section is operable in a transmit portion of the first frequency band to support the multiple communication protocols, converts an outbound signal into a first up converted signal when a first one of the multiple communication protocols is active, and converts the outbound signal into a second up converted signal when a second one of the multiple communication protocols is active. The off-chip multiple protocol duplexer is coupled to filter the inbound HF signal to produce the filtered inbound HF signal and to filter the second up converted signal to produce the outbound HF signal when the second one of the multiple communication protocols is active. | 2009-05-07 |
20090116511 | DYNAMIC CHANNEL SHARING USING BANDWIDTH METRICS - In a Mobile Ad Hoc Network (MANET), each node calculates a bandwidth output value representative of data output requirements for the node relative to the transmit time slots available to the node. This value is shared with other nodes in the MANET and may be employed to more efficiently allocate channel usage among nodes as traffic demands and network topology change. | 2009-05-07 |
20090116512 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CONTROL INFORMATION IN BROADCAST COMMUNICATION SYSTEM - Disclosed is a method and apparatus for transmitting/receiving control information in a system in which one or more Radio Frequencies (RFs) are used to carry multiple services through a frame constituted by time resources or time-frequency resources. Control information regarding frame configuration information is not transmitted over a separate control channel but over a data channel through which to transmit primary service traffic among all service traffic, and each non-primary service traffic other than the primary service traffic includes control information for a primary service. Thus, even when a receiver changes the current service to a target service, control information necessary to detect the location of the target service in a frame and demodulate the target service can be acquired, and thus a service change can be made without reading a separate control channel. | 2009-05-07 |
20090116513 | System and Method for Providing Single IP Tunnel - In one embodiment, a method includes receiving a packet at a network processor, and determining the packet is to be directed to a selected one of a plurality of traffic processors if a tunnel endpoint identifier of the packet is associated with a subscriber terminal. The method further includes determining that the packet is to be directed to the selected one of the plurality of traffic processors if a destination address of the packet is associated with the subscriber terminal. The method still further includes distributing the packet to the selected one of the plurality of traffic processors. | 2009-05-07 |
20090116514 | METHOD FOR IMPLEMENTING SYNCHRONIZATION OF LINK STATE DATABASE, ROUTER, LINE CARD AND MASTER BOARD - A router is provided including a line card (LC), an active master board (AMB), a standby master board (SMB) and a LC for implementing a simple synchronization of a link state database (LSDB). | 2009-05-07 |
20090116515 | METHOD AND CIRCUIT FOR INTERLEAVING, SERIALIZING AND DESERIALIZING CAMERA AND KEYPAD DATA - A system for interleaving high speed data and slower data that is serialized and delivered to a microprocessor. The typical source of the high speed data is a camera and the source of the slower data is a keyboard. The high speed data and the slower data, illustratively, are interfaced with a micro-processor in a parallel fashion. The present invention mirrors the parallel interface to the microprocessor, and mirrors the parallel interface to the sources of the high speed (camera) and slower (keypad) data. The present system formats parallel data from the sources and passes that data in serial form, typically with a clock, on a flexible cable that joins two sections of many cell phones or other hand held devices. | 2009-05-07 |
20090116516 | MODE-LOCKED SOLID-STATE LASER APPARATUS - A mode-locked solid-state laser apparatus having a resonator which includes a solid-state laser medium, a saturable absorption mirror, and a negative group dispersion element therein, in which the solid-state laser medium and the saturable absorption mirror are disposed at a distance not greater than twice a Rayleigh length which is determined by the beam radius of oscillation light formed at the saturable absorption mirror. The apparatus further includes a dichroic mirror in the resonator that reflects excitation light inputted from a direction crossing the optical axis of the resonator toward the solid-state laser medium and transmits oscillation light. | 2009-05-07 |
20090116517 | SEMICONDUCTOR LASER EXCITATION SOLID LASER CONTROL DEVICE, SEMICONDUCTOR LASER EXCITATION SOLID LASER DEVICE HAVING THE SAME, AND AN IMAGE FORMATION DEVICE HAVING THE SAME - A semiconductor laser excitation solid laser control device | 2009-05-07 |
20090116518 | Multiplexing of optical beams using reversed laser scanning - A high efficiency, low cost, nondispersive optical multiplexing arrangement for optical beams, used a technique denominated “Reverse Laser Scanning.” In the Reverse Laser Scanning operation, different laser beams angularly meet on the rotational axis of a galvanometer-mounted mirror or the like. Upon reflection from the mirror, each of the laser beams is propagated along one defined direction by appropriate angular positioning of the galvanometer mirror. The process enables several useful deployments, including multi-chemical detection using several lasers in the same sensor, remotely operated laser switching for medical surgery and diagnosis where multiple lasers may be used, and wavelength, code, and time division multiplexing in communication systems, among others. | 2009-05-07 |
20090116519 | SCALABLE, RECONFIGURABLE, LASER COMBINER - Modular electrical, mechanical and optical components allow for the building of a laser combiner system that can be used, for example, for biological research that allows different lasers to be easily added to or removed from a laser system. Each individual laser can be packaged into a module which can be added to or taken away from the laser system with relative ease. Each of the modules can be controlled via a control module that allows one or more of varying of power levels, switching on/off, shutter control and diagnostic/status information monitoring. | 2009-05-07 |
20090116520 | FREQUENCY-STABILIZED LASER DEVICE, LASER FREQUENCY STABILIZING METHOD, AND LASER FREQUENCY STABILIZING PROGRAM - A frequency-stabilized laser device comprises an actuator arranged to vary the cavity length; an actuator driver arranged to apply a voltage to the actuator for changing displacement; a temperature detector arranged to detect the temperature on the cavity; a temperature adjuster arranged to heat or cool the cavity; a cavity temperature controller arranged to control the temperature adjuster based on a previously given instruction temperature and the temperature on the cavity detected at the temperature detector; and an instruction temperature corrector arranged to correct the instruction temperature given to the cavity temperature controller such that the voltage applied to the actuator remains almost constant. | 2009-05-07 |
20090116521 | ABNORMALITY DETECTION METHOD FOR GAS LASER OSCILLATOR AND GAS LASER OSCILLATOR FOR IMPLEMENTING THE METHOD - A gas laser oscillator ( | 2009-05-07 |
20090116522 | Enhanced efficiency laterally-coupled distributed feedback laser - The invention describes the method and apparatus for enhanced efficiency in a laterally-coupled distributed feedback (LC-DFB) laser. In a device featuring the effective ridge design, lateral confinement of the guided optical modes is provided by a surface etched grating, which also serves as a DFB element of the laser. Coupling and quantum efficiency of such a LC-DFB laser both improve with an increase of the lateral mode order. In accordance with this invention, a dramatic enhancement of the laser efficiency is achievable by designing it to operate in one of the higher order modes, notably the first order mode, while all the other lateral modes, including the zero order mode, are suppressed through gain-loss discrimination. In the exemplary embodiment of the invention, this enhanced efficiency technique is applied to the design of a single-mode LC-DFB laser suitable for a monolithic integration with other active and passive functional elements of photonic integrated circuits fabricated by using one-step epitaxial growth. | 2009-05-07 |
20090116523 | HYBRID LASER DIODE - Provided is a hybrid laser diode. The hybrid laser diode includes: a silicon layer constituting a slab waveguide; and a compound semiconductor layer disposed on the silicon layer to constitute a channel waveguide. | 2009-05-07 |
20090116524 | Single-exciton nanocrystal laser - A laser system employing amplification via a single exciton regime and to optical gain media having single exciton amplification is provided. | 2009-05-07 |
20090116525 | OPTOELECTRONIC SYSTEMS PROVIDING HIGH-POWER HIGH-BRIGHTNESS LASER LIGHT BASED ON FIELD COUPLED ARRAYS, BARS AND STACKS OF SEMICONDUTOR DIODE LASERS - A semiconductor diode laser having a broad vertical waveguide and a broad lateral waveguide is disclosed emitting laser-light in a single vertical mode and a single lateral mode narrow beam. The vertical waveguide comprises a coupled cavity structure, wherein light, generated in the active medium placed in the first cavity leaks into the second cavity and returns back. Phase matching conditions govern the selection of a single vertical mode. A multi-stripe lateral waveguide comprises preferably a lateral photonic band crystal with a lateral optical defect created by selected pumping of multistripes. This approach allows the selection of a single lateral mode having a higher optical confinement factor and/or a lower absorption loss and/or a lower leakage loss compared to the rest lateral optical modes. This enables a single lateral mode lasing from a broad area field coupled laser array. A laser system comprised of multiple field coupled laser arrays on a single wafer and a set of external mirrors enables an ultra-broad field coupled laser bar emitting a coherent laser light in a single vertical optical mode and a single lateral optical mode. A laser system comprised of multiple ultra-broad field coupled laser bars on different wafers and a set of external mirrors enables an ultra-broad field coupled laser stack emitting coherent laser light in a single vertical optical mode and a single lateral optical mode. This allows realization of ultrahigh power ultrahigh brightness laser systems based on semiconductor diode lasers. | 2009-05-07 |
20090116526 | Semiconductor light-emitting device with a surface emitting type - A structure of an optical device with the surface emitting type and a method to form the optical device are disclosed, where the optical device is able to operate in high frequencies. The device provides a lower DBR structure, an active layer, a current injection layer, a current blocking layer, and an upper DBR structure on a GaAs substrate. The current blocking layer, horizontally putting the current injection layer therebetween, are an un-doped GaInP grown at a temperature between 500 to 600° C. and an un-doped AlGaInP grown at a temperature between 500 to 650° C. Because the un-doped current blocking layer shows the high resistivity for both electrons and holes, the parasitic capacitance in the current blocking layer becomes small. | 2009-05-07 |
20090116527 | Surface emitting laser diode including grating layer - A surface emitting laser diode includes a ring-shaped first semiconductor layer including an n-type clad layer, a ring-shaped active layer provided on the first semiconductor layer, and a ring-shaped second semiconductor layer which is provided on the active layer and includes a p-type clad layer and a grating layer including grating units continuously arranged in a circumferential direction, each grating unit including a plurality of regions having different refractive indices and being adjacent to each other in the circumferential direction. | 2009-05-07 |
20090116528 | Nitride semiconductor laser device - A nitride semiconductor laser device has a multilayer structure formed by stacking a plurality of nitride semiconductor layers made of hexagonal nitride semiconductors, while the multilayer structure is provided with a waveguide structure for guiding a laser beam, the nitride semiconductor layers forming the multilayer structure are stacked in a direction substantially perpendicular to the c-axes of the hexagonal nitride semiconductors constituting the nitride semiconductor layers, a first cavity facet forming a side surface of the waveguide structure is a c-plane having Ga-polarity, a second cavity facet forming another side surface of the waveguide structure opposed to the first cavity facet is a c-plane having N-polarity, a crystalline nitrogen-containing film is formed on the surface of the first cavity facet, and the reflectance of the first cavity facet is smaller than the reflectance of the second cavity facet. | 2009-05-07 |
20090116529 | SEMICONDUCTOR LASER APPARATUS, METHOD OF MANUFACTURING SEMICONDUCTOR LASER APPARATUS, AND OPTICAL PICKUP APPARATUS - A monolithic red/infrared semiconductor laser device is joined to a blue-violet semiconductor laser device. The distance between a blue-violet emission point in the blue-violet semiconductor laser device and an infrared emission point in an infrared semiconductor laser device is significantly shorter than the distance between a red emission point in a red semiconductor laser device and the infrared emission point. A blue-violet laser beam, a red laser beam, and an infrared laser beam respectively emitted from the blue-violet emission point, the red emission point, and the infrared emission point are introduced into a photodetector after being incident on an optical disk by an optical system comprising a polarizing beam splitter, a collimator lens, a beam expander, a λ/4 plate, an objective lens, a cylindrical lens, and an optical axis correction element. | 2009-05-07 |
20090116530 | High power seed/amplifier laser system with beam shaping intermediate the seed and amplifier - An apparatus and method of operation for a high power broad band elongated thin beam laser annealing light source, which may comprise a gas discharge seed laser oscillator having a resonance cavity, providing a seed laser output pulse; a gas discharge amplifier laser amplifying the seed laser output pulse to provide an amplified seed laser pulse output; a divergence correcting multi-optical element optical assembly intermediate the seed laser and the amplifier laser. The divergence correcting optical assembly may adjust the size and/or shape of the seed laser output pulse within a discharge region of the amplifier laser in order to adjust an output parameter of the amplified seed laser pulse output. The divergence correcting optical assembly may comprise a telescope with an adjustable focus. The adjustable telescope may comprise an active feedback-controlled actuator based upon a sensed parameter of the amplified seed laser output from the amplifier laser. | 2009-05-07 |
20090116531 | LASER HAVING DISTRIBUTED INDUCTANCES - An RF excited laser assembly includes a pair of opposed electrodes, and at least one inductor. The pair of opposed electrodes defines an inter-electrode gap that provides a discharge volume for laser propagation within a gas medium. The pair of opposed electrodes define one or more discharge-free regions within a laser-free region in the inter-electrode gap. The least one inductor is electrically connected to both electrodes and extends between the electrodes within the inter-electrode gap and inside of the one or more discharge-free regions within the laser-free region. | 2009-05-07 |
20090116532 | Reactor Vessel for Plasma Gasification - Disclosed herein is a reactor vessel for plasma gasification reactors employing a DC graphite electrode, AC graphite electrodes, AC plasma torches or DC plasma torches to create a high-energy plasma are for the pyrolytic decomposition of feed materials. The vessel is configured with an upper portion and a lower portion, where the lower portion is for the containment of a layer of molten metal (iron) and a second layer of slag and having a substantially uniform width, while the upper portion being for the containment of gas and having a varying width. The reactor vessel comprises a steel shell housing a multi-layered wall that defines a chamber where the multi-layered wall includes a first layer high-density refractory material, a second intermediate layer of a insulating material, and a third outer layer of high-density refractory materials. The vessel also includes a multi-layered bottom a first bottom layer comprised of one or more layers of high-density refractory material, and a second bottom layer comprised of insulating materials. The vessel has at least one opening in the wall of the vessel for the introduction of feed material located just above the slag layer. | 2009-05-07 |
20090116533 | Method and apparatus for testing and evaluating machine components under simulated in-situ thermal operating conditions - A method and apparatus is described for enabling the testing and evaluation of industrial machine components and, in particular, gas turbine engine components, under simulated in-situ thermal operating conditions for effectively evaluating new component designs and repair techniques. A specimen machine component/part is placed in a test chamber and cyclically heated and cooled while being monitored to obtain information regarding the initiation and propagation of a crack within the structure of the component. Information regarding the number of heating and cooling cycles sustained by the component until crack initiation and information indicating the rate of crack propagation are acquired and compared over multiple heating-cooling cycles to evaluate components and repair techniques. In one example implementation, the component is monitored during cyclic heating-cooling for spontaneous acoustic emissions and acoustic emission waveform data is recorded and analyzed to determine crack initiation and/or propagation. | 2009-05-07 |
20090116534 | METHOD FOR OPERATING A GAS SENSOR - The invention relates to a method for operating a sensor, in particular a sensor made of ceramic material. Said sensor is heated to a shock-resistance temperature which is higher than a specific temperature. | 2009-05-07 |
20090116535 | Apparatus and Method Determining the Amount of Time until a Desired Temperature is Reached - A method and an apparatus capable of providing a predicted completion time for heating and/or cooling of an item based on a manually entered length of time and/or a determination of the amount of time remaining before an item such as food reaches a desired temperature such as a cooking temperature or approximately room temperature. In at least one embodiment, determining the amount of time remaining is based at least on the elapsed time and the percentage of temperature range between a first temperature and the desired temperature completed or remaining to be covered. | 2009-05-07 |
20090116536 | Quality Control Material Monitor - An apparatus is disclosed designed to monitor the thermal status of a quality control material. The apparatus has the ability, with visual and/or audible means, to alert the user when the quality control material has become thermally equal to the local, ambient environment by way of natural thermal entropy. The apparatus alerts the user by visual and/or audible indicators when the quality control material, after removal from the monitor, should be returned to cool storage after a pre-determined period to maintain its designed criteria, integrity and/or purpose. | 2009-05-07 |
20090116537 | Combined temperature and pressure transducer incorporating connector keyway alignment and an alignment method - A transducer sensor is positioned within a hollow of the body of a housing. The housing has an extending alignment pin, which pin coacts with a corresponding slot or aperture in the wall of a vessel whose pressure or temperature is to be monitored. The transducer body is associated with a connector where the alignment pin is placed and extends from the housing in a fixed relation to the connector. A suitable aperture or slot in the wall of the vessel to be monitored accommodates the extending pin whereby when the transducer is placed in the vessel aperture the connector associated with the transducer is always located in proper position. Positioned on the housing is a sliding nut which can move in a direction parallel to the central axis of the housing and either to the right or left. This sliding nut is rotatably positioned in the housing and coacts with threads formed in the aperture in the wall of the vessel to enable tightening of the transducer housing when placed in the wall and when the alignment pin is positioned within the corresponding slot or aperture. This assures a proper alignment so that an external connector which is not moveable or rotatable can be immediately connected to the transducer connector without further experimentation or adjustment. | 2009-05-07 |
20090116538 | PERFORMANCE TESTING APPARATUS FOR HEAT PIPES - A heat pipe performance testing apparatus includes a heating set, a cooling set, and a supporting set adjustably supporting the heating and cooling sets thereon. The heating set includes a first immovable portion, and a first movable portion vertically movable to the first immovable portion. A first channel is defined between the first immovable and movable portions. Temperature sensors are attached to the first immovable and movable portions. Heating members are attached to the first movable and immovable portions. The heating members are parallel to the temperature sensors. The cooling set includes a second immovable portion and a second movable portion vertically movable to the second immovable portion. A second channel is defined between the second immovable portion and the second movable portion. Temperature sensors are attached to the second immovable and movable portions. A cooling passageway is formed in the second immovable portion. | 2009-05-07 |
20090116539 | SEMICONDUCTOR DEVICE TEMPERATURE SENSOR AND SEMICONDUCTOR STORAGE DEVICE - A semiconductor device temperature sensor produces a reference level for temperature detection from two or more reference levels of different temperatures to detect a temperature. The temperature sensor is applied for detecting the temperature of a semiconductor storage device having a memory unit which requires a refresh action. A refresh cycle control circuit provided in the semiconductor storage device controls the cycle of the refresh action for the memory unit in response to an output of the temperature sensor. | 2009-05-07 |
20090116540 | Probe cover for ear thermometer - The present invention discloses a probe cover for an ear thermometer, which comprises: a film cover and a base. The film cover has a cover window able to contact the probe window at the front end of the ear thermometer, a hollow cone able to contact the sidewall of the probe and a strengthened element able to contact the cover window and the hollow cone. The thickness of the cover window is same as the thickness of the strengthened element and greater than the thickness of the hollow cone. Thereby, the present invention can prevent the variation of infrared transmittance caused by the misarrangement and non-uniform thickness of the probe cover film disposed at the front of the probe window. | 2009-05-07 |
20090116541 | Mitigating interference in a coded communication system - A technique weights noise power used in a demodulation/demapping process using on an estimate of interference and its associated power. Using this technique the effect of partial interference can be ameliorated. For example, a value, σ | 2009-05-07 |
20090116542 | DIGITAL SIGNAL TRANSMISSION METHOD, TRANSMITTING APPARATUS, AND RECEIVING APPARATUS - In a digital signal transmission method according to the present invention, when N | 2009-05-07 |
20090116543 | SYNCHRONIZATION OF SATELLITE AND TERRESTRIAL BROADCAST ODFM SIGNALS - Synchronization of satellite and terrestrial broadcasts in a shared frequency arrangement is use in order to facilitate simultaneous reception of the broadcasts. A delay value is adjusted based on a synchronization between a first terrestrial broadcast and a satellite broadcast, and a delay value for a second terrestrial broadcast is adjusted based on a synchronization between the second terrestrial broadcast, the first terrestrial broadcast and the satellite broadcast. The adjustment of the relative delay values provides an improved reception pattern based on receipt of a shared frequency communication from multiple sources by improving a signal quality factor within at least selected regions of the coverage areas in which the relative delay values permit synchronization. This allows for synchronization lock between multiple substantially simultaneous broadcasts as determined by a cyclic prefix window of the broadcasts in overlapping coverage areas, useful for simultaneous satellite and terrestrial broadcasts using an OFDM format. | 2009-05-07 |
20090116544 | Performance-based link adaptation techniques using throughput indicator - A multiple carrier wireless communications system includes a channel predictor, a performance predictor, and a link adapter. The channel predictor predicts channel state information for a next packet based on channel state information for the current packet. The performance predictor includes an uncoded performance predictor to predict system performance at a decoder input based on a modulation type and the predicted channel state information for the next packet, and a decoder input-output performance mapper to predict system performance at a decoder output based on a coding rate and the predicted system performance at the decoder input. The link adapter includes a link throughput controller to generate a throughput indicator based on a requested system performance and the predicted system performance at the decoder output, and a modulation and coding scheme (MCS) updater to identify a MCS based on the throughput indicator. | 2009-05-07 |
20090116545 | Adaptive Frequency Equalizer - An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information. | 2009-05-07 |
20090116546 | TRANSCODING APPARATUS AND METHOD BETWEEN TWO CODECS EACH INCLUDING A DEBLOCKING FILTER - Disclosed are a transcoding apparatus and method between two codecs each including a deblocking filter. The transcoding method between first and second codecs each including a deblocking filter, may include decoding input data encoded according to the first codec, according to the first codec so as to generate decoded data; and encoding the decoded data according to the second codec. The decoded data may include data on which deblocking filtering is not performed by the first codec, or data on which deblocking filtering is adaptively performed by the first codec. The decoded data may further include data on which deblocking filtering is performed by the first codec. The decoded data may be used as input data when the second codec performs encoding and/or when the second codec performs motion estimation. | 2009-05-07 |
20090116547 | Devices for transmitting digital video and data over the same wires - A method of transmitting a data stream over a communication channel, the method comprising: providing symbol sets having different numbers of symbols; modulating data in the data stream that warrant different degrees of protection against noise onto symbols from symbol sets having different numbers of symbols, wherein which symbol set given data in the stream is modulated onto is independent of symbol sets onto which other data in the data stream is modulated onto; and transmitting the symbols. | 2009-05-07 |
20090116548 | Methods for transmitting digital multimedia and data over the same wires - A method of transmitting a data stream over a communication channel, the method comprising: providing symbol sets having different numbers of symbols; modulating data in the data stream that warrant different degrees of protection against noise onto symbols from symbol sets having different numbers of symbols, wherein which symbol set given data in the stream is modulated onto is independent of symbol sets onto which other data in the data stream is modulated onto; and transmitting the symbols. | 2009-05-07 |
20090116549 | METHODS FOR SELECTING A PREDICTION MODE - A method of selecting a number of candidate prediction modes for a block in a video sequence, the method comprising calculating a cost value of each of prediction modes for each of a predetermined number of blocks, identifying one of the prediction modes having the smallest cost value for the each block, calculating a function value of each of the prediction modes for the each block using a cost function, ranking the prediction modes for the each block by the function value of each of the prediction modes and identifying an ordinal value of the one prediction mode having the smallest cost value, the ordinal value being related to the ordinal number of the one prediction mode after the ranking, calculating a feature value of the each block based on the function value of each of the prediction modes related to the each block, identifying a plurality of sets of blocks, each set of blocks having substantially the same feature value, identifying the number of each set of blocks and calculating a sum of the ordinal value of the one prediction mode for the each block in the each set of blocks, calculating an average value of the sum over the number of the each set of blocks for each set of the plurality sets of blocks, and determining a relation between the average values and the feature values for the predetermined number of blocks. | 2009-05-07 |
20090116550 | VIDEO COMPRESSION SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT USING ENTROPY PREDICTION VALUES - A method, apparatus and computer program product is configured to perform entropy coding of quantized transform coefficients when for some reason no pixels are available for prediction. Different variable length code tables are used for when pixel value predictions are available, or not. If not available, a fixed value is inserted in a block of pixels which is used as the prediction block for deriving the residual block, which in turn are transformed and quantized. A special variable length code table is then used to represent low frequency coefficients of the quantized transform coefficients. | 2009-05-07 |
20090116551 | Data streaming system and method - A data streaming system and method typically use a server arranged to stream one of a plurality of encoded data streams to a client. Each of the plurality of data streams may be an independent representation of a common data source encoded at a different resolution to the other of the plurality of data streams. The server can include a transmitter and a first buffer. The transmitter can be arranged to transmit data packets of the encoded data stream to the client via the first buffer. The transmitter can be arranged to monitor the content of the first buffer and switch to transmit another of the plurality of data streams in the event that predetermined criteria are detected from the first buffer. | 2009-05-07 |
20090116552 | Video compression system - A video compression system is disclosed that is optimized to take advantage of the types of redundancies typically occurring on computer screens and the types of video loss acceptable to real time interactive computer users. It automatically adapts to a wide variety of changing network bandwidth conditions and can accommodate any video resolution and an unlimited number of colors. The disclosed video compression encoder can be implemented with either hardware or software and it compresses the source video into a series of data packets that are a fixed length of 8 bits or more. Sequences of one or more of these packets create unique encoding “commands” that can be sent over any network and easily decoded (decompressed) with either software or hardware. The commands include 3 dimensional copying (horizontal, vertical and time) and unique efficiencies for screen segments that are comprised of only two colors (such as text). Embodiments are also disclosed that improve the video compression depending on the popularity of pixel colors. | 2009-05-07 |
20090116553 | Method of processing a current field macroblock - In one embodiment, the method includes obtaining a reference picture list including multiple reference pictures, obtaining motion vector information for the current field macroblock, and obtaining a field reference picture index associated with the current field macroblock. A frame reference picture index is determined based on the field reference picture index. The frame reference picture index is based on the field reference picture index divided by 2. The embodiment further includes selecting a frame reference picture based on the frame reference picture index and the reference picture list, selecting a field reference picture based on the selected frame reference picture and the field reference picture index, and decoding the current macroblock based on the motion vector information and the selected field reference picture. | 2009-05-07 |
20090116554 | HIGH-PERFORMANCE VIDEO TRANSCODING METHOD - Disclosed is an apparatus ( | 2009-05-07 |
20090116555 | IMAGE ENCODING APPARATUS, METHOD OF CONTROLLING THE SAME, AND COMPUTER PROGRAM - An image encoding apparatus which encodes picture data is provided. The apparatus comprises an encoding unit configured to encode a picture to be encoded; a decoding unit configured to decode the encoded picture; an SN ratio calculation unit configured to calculate an SN ratio using the picture to be encoded and a decoding result of the decoding unit; a setting unit configured to set a target SN ratio serving as an index of the SN ratio; a bitrate control unit configured to control a bitrate of the picture to be encoded based on the target SN ratio; and a motion detection unit configured to detect motion information between the picture to be encoded and another picture, wherein the bitrate control unit controls the bitrate based on the motion information, and a difference between the SN ratio and the target SN ratio. | 2009-05-07 |
20090116556 | DIGITAL IMAGE DECODING APPARATUS AND DIGITAL IMAGE DECODING METHOD - A digital image decoding apparatus which decodes coded data using plurality of motion vectors in each block obtained by dividing an image in frame into a plurality of blocks. The digital image decoding apparatus comprises an error detection unit which detects an error of the block, a decoder which decodes the coded data to generate the motion vector, a motion vector setting unit which computes the motion vector of the block based on the motion vector generated by the decoder and sets the computed motion vector at the block, and a motion compensating decoder which performs motion compensating decoding using the motion vector set by the motion vector setting unit. The decoder generates a reference image motion vector by decoding the coded data of the image which motion compensation is performed to and used as a reference image. When the error detection unit detects the error in the block of the image to which the motion compensation is not performed, the motion vector setting unit computes the motion vector of the block of the image to which the motion compensation is not performed based on the reference image motion vector generated by the decoder, and sets the computed motion vector at the block of the image to which the motion compensation is not performed. | 2009-05-07 |
20090116557 | TEMPORAL MOTION VECTOR FILTERING - Methods and apparatus, including computer program products, implementing and using techniques for performing temporal motion vector filtering in digital video are disclosed. A recursive hierarchical process is used to determine a motion vector. In the recursive hierarchical process, a neighborhood of old motion vectors is filtered to generate a first estimated motion vector for an image patch in a pair of two image frames. The filtering process uses multiple vectors in a neighborhood around the old motion vector to improve the prediction of the first estimated motion vector. The temporal vector partitioning process separates motion vectors associated with an object from motion vectors associated with a background before selecting a best motion vector, which improves the selection process. The process also works well in the absence of object/background boundaries, as in this case the outlier (incorrect) vector or vectors will be separated out from the good vectors. | 2009-05-07 |
20090116558 | Motion skip and single-loop encoding for multi-view video content - A system, method and computer program tangibly embodied in a memory medium for implementing motion skip and single-loop decoding for multi-view video coding. In various embodiments, a more efficient motion skip is used for the current JMVM arrangement by 8×8 or 4×4 pel disparity motion vector accuracy, while maintaining the motion compensation process that is compliant with the H.264/AVC design regarding hierarchical macroblock partitioning. Adaptive referencing merging may be used in order achieve a more accurate motion skip from one inter-view reference picture. In order to indicate whether a picture is to be used for motion skip, a new syntax element or syntax modification in the NAL unit header may be used. | 2009-05-07 |
20090116559 | Method of selecting a reference picture - In one embodiment, the method includes determining reference picture index numbers in a reference picture list. The reference picture index numbers increase for reference pictures having a decreasing display order with respect to a picture including the macroblock, and the reference picture index numbers increase for reference pictures having an increasing display order with respect to the picture including the macroblock. The reference picture index numbers of the reference pictures having a decreasing display order are greater than the reference picture index numbers of the reference pictures having an increasing display order. The method further includes reordering the reference picture index number allocated to each reference picture in the reference picture list, obtaining a field reference picture index associated with the current field macroblock, determining a frame reference picture index based on the field reference picture index and the reference picture index numbers, and selecting a field reference picture having a parity different from a parity of the field macroblock when the field reference picture index is odd value. | 2009-05-07 |
20090116560 | Method of selecting a reference picture - In one embodiment, the method includes obtaining a reference picture list including multiple reference pictures, and reordering a reference picture index allocated to each reference picture in the reference picture list. A field reference picture index associated with the current field macroblock is obtained, and a frame reference picture index is determined based on the field reference picture index and the reference picture index. The reference picture in field unit is selected based on the reference picture index information and the reference picture in frame unit. | 2009-05-07 |
20090116561 | DIGITAL BROADCASTING TRANSMISSION SYSTEM, AND A SIGNAL PROCESSING METHOD THEREOF - A digital broadcasting transmission system, and a signal processing method thereof, includes a parity area generating unit preparing a first area for parity insertion with respect to a dual transport stream (TS) which includes a normal stream and a turbo stream as multiplexed, a first interleaver interleaving the dual TS which is transmitted from the parity area generating unit, a turbo processing unit detecting the turbo stream from the interleaved dual TS, exclusively encoding the detected turbo stream for turbo-processing, and stuffing the encoded turbo stream into the dual TS, a deinterleaver deinterleaving the dual TS which is processed by the turbo processing unit, and a transmitting unit transmitting the dual TS which is processed at the deinterleaver. | 2009-05-07 |
20090116562 | Systems And Methods For Signaling And Performing Temporal Level Switching In Scalable Video Coding - Media communication systems and methods for media encoded using scalable coding with temporal scalability are provided. Transmitting endpoints include switching information in their transmitted media to indicate if temporal level switching at a decoder can occur at any frame of the transmitted encoded media. | 2009-05-07 |
20090116563 | MIXED VIDEO DELIVERING APPARATUS AND METHOD, AND COMPUTER STORAGE MEDIUM - There is provided with a mixed video delivering apparatus, including: a video receiving unit receiving first to Nth encoded video data from first to Nth terminals; a decoding unit decoding the first to Nth encoded video data; a video mixing unit mixing first to Nth decoded video data to obtain mixed video data to be transmitted to a terminal “A” out of the first to Nth terminals; an encoding parameter storage storing first to Nth encoding parameters which are used for encoding the first to Nth videos by the first to Nth terminals; an encoding parameter selecting unit selecting an encoding parameter which is used by any one of terminals other than the terminal A; an encoding unit encoding the mixed video data with a selected encoding parameter to obtain encoded mixed video data; and a video transmitting unit transmitting the encoded mixed video data to the terminal A. | 2009-05-07 |
20090116564 | LOW VOLTAGE DIFFERENTIAL SIGNALING TRANSMITTER AND TRANSMITTING METHOD - A low voltage differential signaling (LVDS) transmitter receives a data signal, a data invert signal and a plurality of logic signals. The LVDS transmitter includes a first-stage differential signaling transmitting circuit and a second-stage differential signaling transmitting circuit. The first-stage differential signaling transmitting circuit receives the data signal and the data invert signal and has a first output terminal and a second output terminal. The second-stage differential signaling transmitting circuit is controlled by the logic signals, and has a third output terminal and a fourth output terminal respectively connected to the first output terminal and the second output terminal, so as to generate a needed pre-emphasis signal. When no pre-emphasis signal needs to be generated, the second-stage differential signaling transmitting circuit is controlled to be in disabled state. | 2009-05-07 |
20090116565 | Method for selecting beams during initial synchronization process using switched beam, switched beam operation method and initial sychronization using the same - A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to minimize the probability of occurrence of interferences between cells by considering a distance between beams within neighboring sectors during an initial synchronization process using switched beams, in an orthogonal frequency division multiplexing (OFDM) cellular system employing a smart antenna. The inventive method comprises the steps of dividing each cell into sectors, and counting the number of fixed beams per cell, and selecting a switched beam for minimizing probability of interference, from fixed beams presenting in a corresponding sector, based on distances between a selected beam and beams of all of adjacent cells and the number of cases to be selected in a subsequent time slot, according to the counted number of the fixed beams existing in each sector. | 2009-05-07 |
20090116566 | DELTA WRITING SCHEME FOR MIMO SIGNAL PATHS - Techniques for writing to registers associated with MIMO signal paths are disclosed. In are embodiment, a controller writes a common value to all registers corresponding to the same operational parameter or parameters, for all signal paths in the MIMO transmitter or receiver. The controller then updates the register in any signal path whose operational paramater differs from the common value, by accumulating a value to the value already in the register, or by replacing the value already in the register with a different value. | 2009-05-07 |
20090116567 | Channel estimation method and apparatus for long range signals in bluetooth - The present invention discloses a channel estimation method for Bluetooth signals through a multipath propagation channel, using a SYNC sequence as a preamble sequence. It mainly comprises the steps of: use of SYNC sequence as input to LS-based channel impulse response estimation, precomputation of local frequency domain preamble, precomputation of local inverted frequency domain preamble and shortening of estimated channel impulse response for further equalization purposes. The proposed channel estimation method and apparatus according to the present invention enables use of efficient equalization algorithms, therefore mitigating ISI and very successfully estimates propagation conditions while being very implementation-friendly. | 2009-05-07 |
20090116568 | Method and Apparatus for Interference Rejection Combining and Detection - A multi-branch OFDM receiver combines diversity signals received over different receiver branches using interference rejection combining. The receiver generates first channel estimates associated with a serving base station, second channel estimates associated with at least one non-serving base station, and a time offset between the serving base station and non-serving base station. The receiver computes a noise covariance matrix based on the second channel estimates and the time offset, and then combines the diversity signals received over different branches using the first channel estimates and the noise covariance matrix. | 2009-05-07 |
20090116569 | Bi-Directional Beamforming Multiple-Input Multiple-Output Wireless Communication - Techniques are provided herein to configure first and second wireless communication devices in order to perform bi-directional beamformed multiple-input multiple-output (MIMO) communication. Each device uses received signals from the other device to compute beamforming weight vectors for application to a plurality of signal streams to be simultaneously beamformed transmitted to the other device. | 2009-05-07 |
20090116570 | METHOD AND APPARATUS FOR GENERATING CHANNEL QUALITY INDICATOR, PRECODING MATRIX INDICATOR AND RANK INFORMATION - A method and apparatus for generating channel quality indicator (CQI), precoding matrix indicator (PMI) and rank information are disclosed. The method and apparatus reduces feedback overhead and defines differential CQI information in an orthogonal frequency division multiplex (OFDM) symbol. | 2009-05-07 |
20090116571 | TRANSMITTER, RECEIVER, AND COMMUNICATION METHOD - A transmitter, a receiver and a communication method enabling improvement of the data rate of an MIMO system. One signal x | 2009-05-07 |
20090116572 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A communication apparatus in which only a terminal having a specific positional relationship can perform communication through a relatively simple arrangement. When initial setting is performed or communication is started, a timing calculating section ( | 2009-05-07 |
20090116573 | FREQUENCY DIVERSE CONTROL MAPPING OF CHANNEL ELEMENTS TO RESOURCE ELEMENTS - Aspects relate to a flexible interleaving scheme that provides frequency diversity to randomizes interference Frequency diversity groups can be utilized, wherein control channel elements (CCEs) gain greater frequency diversity for a given number of mini-CCEs (e.g., subset of CCEs). A frequency diversity group index is permuted according to a bit reversed scheme to facilitate control channel elements with a small number of mini-CCEs to also gain sufficient frequency diversity. | 2009-05-07 |
20090116574 | METHODS AND APPARATUS FOR RECEIVE POWER UNIFICATION FOR MIMO AND NON-MIMO SIGNALING - A method for receive power unification for multiple-input and multiple-output (MIMO) and non-MIMO signaling is described. A data stream may be separated into multiple individual data streams for transmission by multiple transmit antennas. Orthogonal frequency division multiplexing (OFDM) may be applied to the individual data streams to obtain one or more OFDM symbols. Unification processing may be applied to an OFDM symbol. Individual data streams may be transmitted using multiple transmit antennas. | 2009-05-07 |
20090116575 | Method of a receiver estimating a plurality of channels - A method and apparatus of a receiver estimating a plurality of channels is disclosed. The method includes the receiver receiving a composite signal. The composite signal includes a signal from each of a plurality of transmission antennas, wherein the signal of each transmission antenna includes a delay relative to other signals of other antennas. The receiver estimates channels between the receiver and the plurality of transmission antennas based on amplitude and a phase of a received composite signal, at a plurality of frequencies. | 2009-05-07 |
20090116576 | REDUCED COMPLEXITY MULTICARRIER PRECODER - A reduced complexity precoder provides an efficient method and structure to precode a vector-signal-point sequence for transmission through a band-limited channel. The precoder enables a block-oriented receiver to recover an underlying data stream in the presence of inter-symbol interference and noise. The precoder structure is applicable to multicarrier systems such as DMT (discrete multitone) or related transform domain and vector communication systems. The inventive precoder reduces the cost of precoding by an order of magnitude and eliminates the need for a cyclic prefix in DMT and related communication systems. Related multicarrier transmitter and receiver structures and methods which reduce computation, increase transmission bandwidth and reduce transmission power are also developed. | 2009-05-07 |
20090116577 | METHOD AND SYSTEM FOR MULTIPLE INPUT AND MULTIPLE OUTPUT CHANNEL ESTIMATION - The invention relates to a method and system for multiple input and multiple output channel estimation, which can be used to generate and correlate sets of complementary sequences of length N, having a number of elements K greater than or equal to two. According to the invention, a block is used to generate sequences and to convolve same with an input signal, after which they are sent directly, or modulated, to the transmission channel. Once they have been received, and optionally demodulated, they pass through a correlator filter such as to obtain the input signal convolved by the channel, having a noise level reduced by factor KN. | 2009-05-07 |
20090116578 | DISTORTION COMPENSATION IN A COMMUNICATION SYSTEM - In one embodiment of the invention, a modulator mixes a transmit-path signal based on a local oscillator (LO) signal and an amplifier amplifies the mixed transmit-path signal to generate an output signal for transmission. A demodulator generates a receive-path signal based on the output signal and the LO signal. Phase-shift control components provide the output signal and the LO signal to the demodulator during a first time duration and provide a phase-shifted version of one of the output signal and the LO signal to the demodulator during a second time duration. The demodulator generates a second receive-path signal based on the one of the phase-shifted output signal and the phase-shifted LO signal during the second time duration. At least one predistortion circuit adjusts at least one of the transmit-path signal and the receive-path signal based on a difference in signal characteristics of the receive-path signal during the second time duration relative to the first time duration. | 2009-05-07 |
20090116579 | INTERPROCESSOR COMMUNICATION LINK FOR A LOAD CONTROL SYSTEM - The present invention provides a reliable communication protocol that provides multicasting of digital messages on an interprocessor link coupling together a plurality of processors of a load control system. Preferably, the load control system includes a plurality of sub-systems, with a number of the processors in each sub-system. The processors are each characterized by a unique individual address, while all of the processors of a single sub-system are characterized by an identical multicast address. The processors re-transmit digital messages on the communication link if a target address of the digital message is equal to the multicast address. The processors determine if acknowledgement messages are received from each of the processors from which acknowledgement messages were expected during a predetermined amount of time after transmitting an initial digital message, and transmit a retry message in response to determining that the acknowledgement messages were not received. | 2009-05-07 |
20090116580 | DIGITAL BROADCASTING TRANSMISSION CAPABLE OF IMPROVING RECEIVNG AND EQUALIZING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitting system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a transport stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the transport stream into which stuff bytes are inserted, an encoder to encode the transport stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded transport stream, RF-convert the modulated transport stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization. | 2009-05-07 |
20090116581 | PRE-CODING APPARATUS ON ACCOUNT OF ADAPTIVE ESTIMATION - A pre-coding process and apparatus on account of adaptive estimation is provided, which comprises a plurality of channel state information detectors, a reduction sampler, a plurality of adaptive estimators, an error-estimation averager, and a parallel/serial transducer. The pre-coding implementation of the present apparatus can be divided in an initial stage of acquisition and a following tracking stage. The present invention can be applied to Single-Input Single-Output (SISO) antenna system and Multiple-Input Multiple-Output (MIMO) antenna system, in order to advance the dependability and stability of the system, which also have advantage in further decreasing the complexity, power consumption and cost of the end-user host receiver, easy implementation, and high immunity from channel noise interference. | 2009-05-07 |
20090116582 | INTERPOLATION METHOD AND APPARATUS FOR INCREASING EFFICIENCY OF CROSSTALK ESTIMATION - Techniques are disclosed that efficiently obtain channel crosstalk estimates in DSL systems and other communication systems that may include unsynchronized channels. For example, a method includes obtaining a first set of estimated measures of crosstalk for a first portion of a plurality of communication channels over which data signals are to be transmitted from a transmitter to a plurality of receivers, and interpolating a second set of estimated measures of crosstalk for a second portion of the plurality of communication channels based on the first set of estimated measures of crosstalk. The first portion of the plurality of communication channels may be a subset of the plurality of communication channels and the second portion of the plurality of communication channels is a remainder of the plurality of communication channels. Each estimated measure of crosstalk may relate to at least one tone associated with at least one of the plurality of communication channels. | 2009-05-07 |
20090116583 | HDMI communication over twisted pairs - A method of transmitting a data stream over a communication channel, the method comprising: providing symbol sets having different numbers of symbols; modulating data in the data stream that warrant different degrees of protection against noise onto symbols from symbol sets having different numbers of symbols, wherein which symbol set given data in the stream is modulated onto is independent of symbol sets onto which other data in the data stream is modulated onto; and transmitting the symbols. | 2009-05-07 |
20090116584 | System and Method for Receiving User-Specific Information Over Digital Radio - A system and method for permitting users to receive desired/user-specific data or information, e.g., electronic mail or other user-subscribed services, e.g., for textual information, over the airwaves via a receiver, e.g., a digital receiver In one embodiment, an authorization process is provided wherein the receiver includes a hard-coded user ID stored thereon for comparison with an input user ID encoded with user-specific data signals. A splitter permits simultaneous processing of e.g., radio frequency signals including user-specific information via an authorization path, as well as radio frequency signals having standard audio and/or audio/video information. The authorization path includes an out-of-band tuner and an authorizing means for authorizing user-specific data transmissions for retrieval by an authorized receiver | 2009-05-07 |
20090116585 | ANALOG FRONT-END HAVING BUILT-IN EQUALIZATION AND APPLICATIONS THEREOF - An analog front-end having built-in equalization includes a control module and a tunable gain stage. The control module is operably coupled to provide a frequency response setting based on a channel response of a channel providing high-speed serial data to the analog front-end. The tunable gain stage includes a frequency dependent load and an amplifier input section. The frequency dependent load is adjusted based on the frequency response setting. The amplifier input section is operably coupled to the frequency dependent load and receives the high-speed serial data. In conjunction with the frequency dependent load, the amplifier input section amplifies and equalizes the high-speed serial data to produce an amplified and equalized serial data. | 2009-05-07 |
20090116586 | DIRECT CONVERSION RECEIVER AND METHOD FOR CORRECTING PHASE IMBALANCE THEREIN - A direct conversion receiver and a method for correcting phase imbalance therein is disclosed. An input signal is applied to an in-phase channel and a quadrature channel of the receiver. The input signal is processed by the direct conversion receiver to obtain an in-phase zero intermediate frequency (IF) signal in the in-phase channel and a quadrature zero-IF signal in the quadrature channel. The in-phase zero-IF signal and the quadrature zero-IF signal are filtered to obtain a fixed band signal. A phase imbalance correction value is obtained for the fixed-band quadrature zero-IF signal as a function of the frequency of the fixed-band in-phase zero-IF signal and the fixed-band quadrature zero-IF signal. The in-phase zero-IF signal and the quadrature zero-IF signal are sampled and the phase imbalance correction value is applied using an interpolation to the sampled quadrature zero-IF signal or to the sampled in-phase zero-IF signal to correct the phase imbalance in the direct conversion receiver. | 2009-05-07 |
20090116587 | METHOD, SYSTEM AND APPARATUS FOR GENERATING CONSTANT AMPLITUDE ZERO AUTOCORRELATION SEQUENCES - A method, system and apparatus for generating a constant amplitude zero autocorrelation (CAZAC) sequence to be transmitted on a wireless communication channel between a user equipment and a base station within a cellular communication network includes iteratively calculating elements of the CAZAC sequence according to a CAZAC sequence formula until a number of iterations has reached a predetermined iteration value determined in accordance with a number of subcarriers associated with the channel; obtaining a value of particular elements of the CAZAC sequence from a table of stored values at predetermined reset iteration values in order to limit error propagation; and generating the reference signal based upon the elements of the CAZAC sequence. The CAZAC sequence formula is one of a Chu sequence, Frank-Zadoff sequence, Zadoff-Chu (ZC) sequence, and Generalized Chirp-Like (GCL) Sequence. | 2009-05-07 |
20090116588 | WIRELESS COMMUNICATIONS APPARATUS - A lattice reduction device is described for determining a reduced lattice for a MIMO decoder. The device comprises a data processing element operable to receive matrix information and to apply one or more data processing operations on the matrix information. The device further comprises first and second parallel operation means operable in conjunction with the data processing element so that any operation carried out by said data processing element on said matrix information is directly matched by an operation carried out on respective matrix information. The data processing element is operable, on an input triangular matrix being an R component of a QR decomposition of a channel state matrix, to tend non diagonal elements of said triangular matrix towards zero on the basis of matrix column operations and to make corresponding column operations at said first and second parallel operation means. The first parallel operation means is operable on the basis of an initial matrix which is an identity matrix and said second parallel operation means is operable on the basis of an initial matrix which is said channel state matrix. | 2009-05-07 |
20090116589 | Performance-based link adaptation techniques - A multiple carrier wireless communications system includes a channel predictor, a performance predictor, and a link adapter. The channel predictor is configured to predict channel state information for a next packet based on channel state information for the current packet. The performance predictor includes an uncoded performance predictor configured to predict system performance at an input of a decoder based on a modulation type and the predicted channel state information for the next packet, and a decoder input-output performance mapper configured to determine a required coding rate based on a requested system performance and the predicted system performance at the input of the decoder. The link adapter includes a modulation and coding scheme (MCS) updater configured to identify a MCS based on the required coding rate. | 2009-05-07 |
20090116590 | APPARATUS AND METHOD FOR DETECTING SIGNAL IN MULTI-ANTENNA SYSTEM - A method and an apparatus for detecting a signal in a multi-antenna system using a spatial multiplexing are provided. The apparatus includes at least one antenna for receiving a signal, a channel estimator for estimating a channel using the received signal, a detector for calculating multiplication values commonly used to determine a Euclidean distance using the receive signal and channel information and for detecting a transmitted signal by calculating Euclidean distances of one or more candidate symbols using the receive signal and the determined multiplication values and a decoder for demodulating and decoding the detected signal. Hence, the computational complexity of the signal detection can be mitigated. | 2009-05-07 |
20090116591 | SPECTRAL DECOMPOSITION OF LARGE SIGNALS IN A NARROW-RANGE SAMPLING SYSTEM - A sampling method that determines the deterministic and random components of a signal when the magnitude of the signal exceeds the range of the sampler. | 2009-05-07 |