Pulse or digital communications inventions 02/06

20060039448 - Devices and methods for ultra-wideband communications: A method for generating an ultra-wideband communications signal is described. The method includes generating a piecewise linear ultra-wideband baseband signal comprising at least one pulse, based on an inputted data signal; generating a carrier tone having a carrier frequency suitable for wireless transmission; and upconverting the baseband signal with the...

20060039447 - Impulse radio systems with multiple pulse types: A method signals in an ultra-wide bandwidth network. A data symbol is generated. A set of reference pulses is transmitted for the data symbol. Each reference pulse is of a different type. One data pulse is also transmitted for each reference pulse. A type of each data pulse is identical...

20060039449 - Ultra-wideband receiver and transmitter: A waveform-adaptive ultra-wideband (UWB) transmitter and noise-tracking UWB receiver for use in communications, object detection and radar applications. In one embodiment, the output of an oscillator is gated by a low-level impulse generator either directly or through an optional filter. In a special case of that embodiment wherein the oscillator...

20060039450 - Beacon channel for frequency hopping wireless devices: A mobile device for communicating with other devices using a frequency hopping wireless interface such as blue-tooth, sends a sequence of messages each on a different frequency, for finding other devices within range, and listens for a response during a subsequent response window, on one or more response frequencies. It...

20060039451 - Method and apparatus for fast cell search: A method and apparatus for identifying a base station is provided herein. Particularly, a received reference sequence comprising a GCL-based sequence is analyzed to determine an index of the GCL-based sequence. The index of the GCL-based sequence is then mapped to a base station identity....

20060039452 - Tracking apparatus and method for a mobile communication system: A tracking apparatus and method are provided which can reduce the effects of multipath interference which occurs when a receiving end of a mobile communication system tracks a received signal. The tracking apparatus includes an interference remover for removing an interference component contained in an early energy signal and a...

20060039453 - Circuit for following up synchronization of a spread-coded signal by power comparison and phase adjustment: A synchronous follow-up circuit carries out correlation operation with a spread code on a receive signal, generated from a received signal in a symbol timing generator, by three symbol correlators, one for shifting the phase forward with respect to a symbol timing signal, another for synchronizing with the same and...

20060039455 - Composite waveform for transmitting an increased amount of data over an analog medium, and devices and methods for producing, encoding, transmitting and decoding same: The present invention is directed towards data transmission over telecommunications networks, and more specifically towards a system and method for enabling high-speed communications through the use of a composite waveform for transmitting an increased amount of data. The present invention has particular application to high-speed data transmissions over analog telephone...

20060039456 - Crosstalk agent for access network nodes: A crosstalk agent for integration in or connection to an access node (DSLAM) automatically gathers quantitative information indicative for the crosstalk coupling between lines (LINE1, LINE2, LINE3, LINE4) connected to the access node (DSLAM). The information may be extracted from an access node MIB each time the on/off state of...

20060039454 - Interference cancellation system: A DSL or other communication system includes a modem or other communication device having at least one antenna that is configured to collect interference data relating to interference noise affecting communication signals being received by the communication device. The interference may include RF interference, such as AM radio interference, crosstalk...

20060039457 - System and method for controlling line driver power in digital subscriber line modems: A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low...

20060039458 - Adaptive filtering using fast affine projection adaptation: A method of adaptive filtering using fast affine projection (FAP) that allows for direct solution of the projected error vector from the autocorrelation matrix using a backward and forward recursion technique or LDLT factorization of the autocorrelation matrix followed by forward substitution, scaling and backward substitution. The method results in...

20060039459 - System and method for linear distortion estimation by way of equalizer coefficients: Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients....

20060039460 - Adaptive equalizer: A channel impulse response is determined from a cross-correlation of a received training sequence and a stored version of the transmitted training sequence. The channel impulse response is iteratively cleansed of noise caused by the finiteness of the cross-correlation. Initial values of the tap weights for the taps of an...

20060039468 - Method and apparatus for capturing and transmitting screen images: A remote management controller may include a video redirection device and a processor. The video redirection device may be configured to: obtain multiple separate slices of video data output from a video graphics controller; calculate at least one value correlative to each of the multiple separate slices of video data;...

20060039467 - Method and apparatus for capturing slices of video data: A remote management controller may include a capture engine and a processor. The capture engine may be configured to obtain a slice of video data output from a video graphics controller, store the slice of video data, and calculate at least one value correlative to the slice of video data....

20060039464 - Method and apparatus for capturing video data to a virtual screen buffer: A remote management controller may include a capture engine and a processor. The capture engine may be configured to obtain a slice of video data output from a video graphics controller, calculate at least one value correlative to the slice of video data, and, if the calculated value for any...

20060039466 - Method and apparatus for managing changes in a virtual screen buffer: A remote management controller may include a capture engine and a processor. The capture engine may be configured to: obtain a slice of video data output from a video graphics controller; calculate at least one value correlative to the slice of video data; determine whether any portion of the slice...

20060039465 - Method and apparatus for redirection of video data: A remote management controller may include a video redirection device and a processor. The video redirection device may be configured to: obtain a slice of video data output from a video graphics controller; calculate at least one value correlative to the slice of video data; and if the calculated value...

20060039463 - Picture coding method, picture decoding method, picture coding apparatus, picture decoding apparatus, and program thereof: A picture coding method of the present invention codes a picture signal and a ratio of the number of luminance pixels and the number of chrominance pixels for the picture signal, and then one coding method out of at least two coding methods is selected depending on the ratio, and...

20060039461 - Video coding method: In a coding method and coding system to generate a compressed data stream (CAV) with a variable bit rate from digital audio and/or video signals, with a prescribed limitation on the overall bit quantity/rate of the data stream, the signals are written to segments (s1, s2) of a temporary buffer...

20060039462 - Vsb communication system: A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according...

20060039469 - Scalable video compression based on remaining battery capacity: A method and apparatus for controlling the recording of streaming data by a mobile recording apparatus is disclosed. A streaming data input signal is received and the streaming data signal is compressed in a scalable manner using a scalable encoder to create layered encoded streaming data streams. Storage of the...

20060039470 - Adaptive motion estimation and mode decision apparatus and method for h.264 video codec: Disclosed herein is an adaptive motion estimation and mode decision apparatus and method for an H.264 video codec. The apparatus includes a background image detection unit, an inter mode inspection unit, an intra mode inspection unit and a mode inspection skip unit. The background image detection unit inspects whether a...

20060039471 - Encoder-assisted adaptive video frame interpolation: The disclosure is directed to techniques for encoder-assisted adaptive interpolation of video frames. According to the disclosed techniques, an encoder generates information to assist a decoder in interpolation of a skipped video frame, i.e., an S frame. The information permits the decoder to reduce visual artifacts in the interpolated frame...

20060039475 - Error concealment in a video decoder: The error concealment technique disclosed herein relates to the use of existing information by the decoder to conceal bitstream errors regardless of what the encoder does. Examples of existing information include, for example, the previous reference frame, macroblock information for the previous reference frames, etc. Another aspect of the system...

20060039477 - Method and apparatus for fast block motion detection: A method, system, and/or apparatus for quickly detecting blocks or regions in an image whose pixels that can be coded efficiently by a pointer to the same block occurring in a reference image. The reference image is shared between an encoder and a corresponding decoder. One embodiment of the encoder...

20060039473 - Method for transcoding compressed video signals, related apparatus and computer program product therefor: Transcoder apparatus for transcoding an input video bit-stream having a first encoding profile (e.g., MPEG-2) into an output video bit-stream having a second encoding profile (e.g., H.264), the first encoding profile including motion estimation information, the apparatus including: a front-end for extracting the motion estimation information from the input video...

20060039472 - Methods and apparatus for coding of motion vectors: A method and apparatus is described for coding motion information in video processing of a stream of image frames and for avoiding the drift problem. The method or apparatus is for providing motion vectors of at least one image frame, and for coding the motion vectors to generate a quality-scalable...

20060039476 - Methods for efficient implementation of skip/direct modes in digital video compression algorithms: The approach of the present invention is to take advantage of similarity in implementation between SKIP and DIRECT modes and one other inter-picture prediction modes, namely, the 16×16 partition mode. The SKIP/DIRECT modes are classified into two groups, one involving inter-picture prediction in one temporal direction in which prediction is...

20060039474 - Motion vector estimating method and motion picture processor: A motion vector estimator includes an object data input and sorting unit and a reference data input and sorting unit for sorting packed input picture data to separate first picture data used for estimating the motion vector from second picture data that is not used for estimating the motion vector...

20060039478 - Image decoding and reducing apparatus and method: Image data that has undergone JPEG compression is subjected to variable-length encoding to obtain orthogonal transform coefficients. The resolution (size) of the compressed image data is acquired and, based upon the resolution of a target reduced image and the acquired resolution, some orthogonal transform coefficients to be used in an...

20060039480 - Apparatus for transmitting video signal and method thereof: The present invention relates to transmitting a coded video signal, wherein the video signal is preferably an MPEG-4 video signal including a base layer and an enhancement layer. The present invention comprises a first coding unit for coding the video signal into a first stream, a second coding unit for...

20060039479 - Method and device for choosing a mode of coding: The present invention relates to a method and a device for choosing a mode of coding from among a plurality of modes of coding for a subset of blocks included in a set of blocks. An energy function over the set of blocks for each of the modes of coding...

20060039481 - Method for a mosaic program guide: A method and apparatus for generating a mosaic program guide. The method comprising; generating I frames from a coded video bit stream; placing each I frame into one of a multiplicity of mosaic windows; and combining the multiplicity of mosaic windows into a mosaic video frame....

20060039482 - Digital broadcasting system for storing broadcast data and method for transmitting and receiving broadcast data: Disclosed are a system for storing broadcast data in DMB (digital multimedia broadcasting) and a method for transmitting and receiving broadcast data. A TS multiplexer included in a transmitter of the digital broadcasting system has a flag inserter that inserts an identification flag indicating the start or end of a...

20060039483 - Efficient video slicing: The disclosure is directed to a video slicing technique that promotes low complexity, bandwidth efficiency and error resiliency. A video encoder places an RM close to the beginning of each logical transmission unit (LTU) so that all but a very small end segment of each video slice fits substantially within...

20060039484 - Miniaturized pulse code modulation encoder: A PCM encoder which receives asynchronous serial data and incorporating the serial data and eight channels of analog data into a PCM data stream. The encoder includes a microprocessor which processes the serial data provided in eight bit digital words and the analog data which the microprocessor converts to twelve...

20060039488 - Channel estimator and related method for smoothing channel responses of a multi-carrier system: A channel estimator and a related method for smoothing channel responses of a multi-carrier system. The channel estimator includes a channel response computing circuit for computing at least one of a target channel estimation and a reference channel estimation by utilizing a computing algorithm, wherein the target channel estimation and...

20060039487 - Clocking architectures in high-speed signaling systems: Clocking systems and methods are provided below that accurately clock per-pin data transfers of input/output (IO) circuits of integrated circuit devices. These multiplexer-based clock selection systems use a dedicated multiplexer to receive clock signals from multiple mixer circuits and in turn to provide a selected reference clock signal for use...

20060039486 - Dsl data collection system: Information is sent by a DSL system component using a non-disruptive operational data parameter. One or more bits of the non-disruptive operational data parameter are used to send other information. In some instances the selected parameter will be an unused parameter, such as an unused fast operational mode or interleaved...

20060039491 - Frequency recovery apparatus and mobile broadcast receiver using the frequency recovery apparatus: A frequency recovery apparatus and a mobile broadcast reception system utilizing the frequency recovery apparatus are disclosed. The frequency recovery apparatus and the mobile broadcast receiver estimate a fractional frequency offset value using I and Q components of a correlation value of a guard interval and compensate for the estimated...

20060039489 - Method and apparatus for providing closed-loop transmit precoding: A method for providing closed-loop transmit precoding between a transmitter and a receiver, includes defining a codebook that includes a set of unitary rotation matrices. The receiver determines which preceding rotation matrix from the codebook should be used for each sub-carrier that has been received. The receiver sends an index...

20060039485 - Pattern position measuring device, method, and program, and record medium on which the program is recorded: The position of a specific pattern such as known symbol in a signal such as an OFDM signal is estimated with high accuracy. An effective symbol extraction section (12) extracts a known symbol (preamble) as an effective symbol from a signal to be measured according to an approximate position of...

20060039490 - Systems and methods for implementing receiver transparent q-mode: In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function...

20060039492 - Hybrid memory architecture for reduced state sequence estimation (rsse) techniques: A method and apparatus are disclosed for improving the processing time of reduced complexity sequence estimation techniques, such as reduced state sequence estimation (RSSE). The possible values for the branch metrics in the RSSE are precomputed to permit pipelining and the shortening of the critical path. The computational load of...

20060039494 - Apparatus and method for beamforming in a multi-antenna system: An apparatus and method for performing beamforming for transmitting a plurality of bit streams output through Adaptive Modulation and Coding (AMC) via a plurality of transmission antennas in a base station using a multi-antenna scheme. The apparatus and method include classifying the plurality of transmission antennas into a plurality of...

20060039495 - Apparatus and method for space-time block coding for increasing coding gain: A space-time block coding apparatus and method in a transmitter with four transmit antennas in a system using a space-time block coding scheme, a pre-coder pre-codes an input symbol sequence by multiplying the input symbol sequence by ejθ, θ being a phase rotation angle, in case of QPSK in range...

20060039496 - Apparatus and method for space-time-frequency block coding for increasing performance: A space-time-frequency block coding apparatus and method in a transmitter with three transmit (Tx) antennas are provided. An input symbol sequence is transmitted through three Tx antennas according to a set method using feedback information received from a receiver or using a selected transmission matrix having regularities in order to...

20060039493 - Generalized m-rank beamformers for mimo systems using successive quantization: The telecommunications system described herein implements a multi-rank beamformer for use in wireless systems equipped with multiple transmit and multiple receive antennas. The multi-rank beamformer uses finite-rate feedback of channel conditions to achieves close to theoretical performance indicated by the water-filling algorithm, while avoiding the computational complexity associated with space...

20060039497 - Linear precoding for multi-input systems based on channel estimate and channel statistics: A method, processor and system for linear preceding for a multiple-input communication channel described in terms of an effective mean and an effective correlation is provided. The effective mean and correlation can be the sample mean and correlation of the channel, or they can also include an estimate of the...

20060039498 - Pre-distorter for orthogonal frequency division multiplexing systems and method of operating the same: A pre-distorter and a power amplifier are combined in a communication system. The purpose of the power amplifier is to provide as high a power as possible to the orthogonal frequency division multiplexing (OFDM) signal being passed by the high power amplifier to the communication system. The pre-distorter inverts the...

20060039499 - Apparatus and method for space-time block coding: A space-time block coding apparatus and method for transmitting an input symbol sequence through a plurality of Tx antennas using a channel information from the receiver in order to improve the performance of a space-time block coding (STFBC). A pre-coder pre-codes an input symbol sequence by multiplying the input symbol...

20060039500 - Apparatus and method for space-time-frequency block coding for increasing performance: A space-time-frequency block coding apparatus and method in a transmitter with three transmit (Tx) antennas are provided. An input symbol sequence is transmitted through three Tx antennas according to a permutation method using a selected transmission matrix in order to improve the performance of an STFBC....

20060039501 - Method and system for utilizing space-time codes for block fading channels: A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in response to the message signal. The code word...

20060039502 - Phase correlated quadrature amplitude modulation: A method of transmitting a base band binary data contained in respective successive time cells, the data being in the form of a signal obtained by amplitude modulation and frequency modulation of a carrier wave with a 0 bit data having a 0 bit mean amplitude and a 0 bit...

20060039503 - Vsb communication system: A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according...

20060039504 - Receiver for a switched signal on a communication line: A receiver for receiving a switched signal on a communication line (1), such as a LIN bus, the signal varying between first and second voltage levels (sup, ground). The receiver comprises a comparator (31,54) responsive to the relative values of the received signal voltage level (Vlin) and an input reference...

20060039505 - Frequency-mixing method and frequency-mixing device using the same: A frequency-mixing method includes a step of generating a first quadrature signal having a predetermined frequency, a second quadrature signal having a phase difference of about 180 degrees with respect to a phase of the first quadrature signal, a third quadrature signal having a phase difference of about 90 degrees...

20060039506 - Phase/gain imbalance estimation or compensation: The present invention relates to a receiver for estimation or compensation of phase imbalance or gain imbalance utilizing a QPSK modulation and a modulation scheme based on a complex scrambling code. According to the present invention the phase imbalance or gain imbalance is estimated or compensated before synchronisation. Thus, the...

20060039507 - Method and apparatus for estimating sfo in digital receiver, and method and apparatus for compensating for sampling frequency using the estimated sfo in the digital receiver: A sampling frequency offset (SFO) estimation method for use in a digital receiver to estimate a correct SFO is disclosed. The method for estimating the SFO in the digital receiver includes the steps of (a) receiving an estimated phase, and comparing a magnitude of the estimated phase with that of...

20060039508 - High sensitivity rf receiver and method for forming the same: A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a decoding circuit, a frequency-hopping circuit, a constant current source and a ring oscillating circuit. The RF receiver...

20060039510 - Method and system for improving reception in wired and wireless receivers through redundancy and iterative processing: A method and system for improving reception in wired and wireless systems through redundancy and iterative processing are provided. A multilayer decoding process may comprise a burst process and a frame process. Results from a first burst process may be utilized to generate a decoded bit sequence in the frame...

20060039509 - Method for decoding data using windows of data: The present invention relates to a method for decoding data, said method using windows (WID) of input data The invention is characterized in that it comprises for a current window the steps of:—Performing a forward recursion, wherein said forward recursion is initialized with a forward state metric vector (a) from...

20060039511 - Digital signal processing remediation of cosite antenna interference: Methods and apparatus for separating desired signals from a mixed signal. A preferred method includes identifying the frequencies associated with the independent signals within the mixed signal and sampling the mixed signal once for each of the identified frequencies. Using the identified frequencies, a set of constant coefficients is determined...

20060039512 - Large scale integrated circuit for data communication, data communication apparatus, data communication system and data communication method: A first transmission/reception unit exchanges a pulse amplitude modulation signal having amplitude value is varied at a plurality of levels, using a two-wire telephone cable. An echo canceler extracts only a pulse amplitude modulation signal to be received, and transmitting and receiving equalizers improve the equalization accuracy of the pulse...

20060039513 - Clock and data recovery systems and methods: Methods of clock and data recovery (CDR) are provided. An exemplary method comprises extending the eye of the data stream by examining transitions of adjacent samples, detecting whether an island sample exists in each symbol according to the separation of the transitions, and altering the value of the neighboring samples...

20060039515 - Method and apparatus for estimating sfo in digital receiver: A method and apparatus for estimating a sampling frequency offset (SFO) in a digital receiver is disclosed. The method for estimating the SFO in the digital receiver to perform sampling synchronization includes the steps of: a) extracting a current scattered pilot contained in a single OFDM (Orthogonal Frequency Division Multiplexing)...

20060039514 - Universal sampling rate converter in electronic devices and methods: A method and apparatus for converting the sampling rate of digital signals including a decimating comprising a low pass filter (122) and a downsampler (124), wherein the input signal is decimated a number of times based on a ratio of an input sampling rate to an output sampling rate. The...

20060039516 - Phase-locked loop circuit: A PLL circuit comprises a controller (DRC) adjusting the frequency of frequency modulated signals (uDIV) provided by a frequency modulator (DIV) on the basis of signals pro-vided by a linear range detector (LRD) so that the phase detector gets back into a linear range after a change in the frequency...

20060034348 - Asynchronous communication system for remote monitoring of objects or an environment: A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and...

20060034347 - System for spatial analysis of a physical quantity: The invention concerns a system wherein the spatial values (S1 to Sn) of the physical quantity are represented by measurement pulses (I1 to In) whereof the temporal ordering represents said values. The system comprises a plurality of processing units (U1 to Un) for processing said measurement pulses. They are arranged...

20060034349 - Power level measuring device and a mobile station: A disclosed power level measuring device includes a power calculator for calculating power values based on correlation values between a received signal and known signals, for each of sampling times within a predetermined period; a time divider for switching connection of input signals, responding to time slots allocated to each...

20060034350 - Method and system for applying viterbi type psk demodulation for optimum correlation of gps signals: A method and system of improving sensitivity in the demodulation of a received signal over an arbitrary measurement time epoch, the method comprising the steps of: correlating the received signal in a coherent fashion (80); and utilizing a Viterbi phase state keying trellis demodulation with a variable resolution of phase...

20060034351 - Monitoring stability of an on-frequency repeater: In a system for monitoring stability of an on-frequency repeater, a wide-band signature (WBS) signal associated with the repeater is generated, and inserted into an output RF signal transmitted by the repeater. Signal components corresponding to the WBS signal in an input RF signal received by the repeater are detected...

20060034352 - Methods and apparatus to facilitate improved code division multiple access receivers: Methods and apparatus to facilitate improve code division multiple access (CDMA) receivers are disclosed. An example method disclosed herein comprises: receiving a signal containing first portions that are based on known data and second portions that are based on unknown data; generating a training signal, from the received signal, that...

20060034353 - Signal receiver having signal acquisition at low signal strength using interleaved time segments: A GPS receiver and method using alternating “A” and “B” integration time segments. The polarities of certain GPS data bits are known beforehand and their expected reception times are known. The GPS signal in 10 millisecond “A” time segments and “B” time segments is depolarized according to the known polarities....

20060034354 - Apparatus, methods and computer program products for positioning system signal processing using parallel computational techniques: A radio signal is processed to generate 1-bit signal values. The 1-bit signal values are bitwise logically combined (e.g., XORed) with a 1-bit quantized carrier demodulation template to produce demodulated 1-bit signal values. The demodulated 1-bit signal values are bitwise logically combined (e.g., XORed) with the positioning system modulation code...

20060034355 - Echo processing deives for single-channel or multichannel communication systems: An echo processing technique for attenuating echo components of a direct signal X1n in a return signal Y2n. A receive gain Grn and a send gain Gen are calculated. The receive gain Grn is applied to the direct signal and an input signal X2n is produced and emitted into an...

20060034357 - Method in frequency converter provided with voltage intermediate circuit, and frequency converter: A method in a frequency converter provided with a voltage intermediate circuit in connection with interference in a network (5) to be supplied and a frequency converter (2), which comprises a network converter part (4) and an inverter part (3) and a DC intermediate circuit (7) between them. The method...

20060034358 - Methods and transmitters for loop-back adaptive pre-emphasis data transmission: A method of transmitting data can include pre-emphasizing data for transmission by a transmitter over a transmission line based on an error feedback signal provided to the transmitter from a receiver of the pre-emphasized data....

20060034356 - Transmission/reception arrangement and method for reducing nonlinearities in output signals from a transmission/reception arrangement: The invention proposes a transmission/reception arrangement (1) which contains a respective distortion unit (5, 6) for the transmission and reception paths (2, 3) and also a calibration apparatus (7). By sending a test signal in an operating mode for calibration and returning the test signal processed in the transmission path...

20060034360 - Fast initialization using seamless rate adaptation: A method for initializing modems in a multicarrier transmission system to establish a communication link between the transmitter and the receiver. An exemplary embodiment includes the steps of providing a predetermined parameter value that approximates a corresponding actual parameter value of the communication link, establishing a data communication link between...

20060034359 - Xdsl multistandard driver circuit: An electric circuit for amplifying an xDSL signal comprises an operational amplifier and a signal monitoring circuit. The operational amplifier is configured to amplify the xDSL signal, is powered by a variable voltage supply and has a gain which is adjustable by an operating mode control signal. The signal monitoring...

20060034361 - Method and apparatus for eliminating cross-channel interference, and multi-channel source separation method and multi-channel source separation apparatus using the same: A method and apparatus for eliminating cross-channel interference, and a multi-channel source separation method and a multi-channel source separation apparatus using the same. The multi-channel source signal separation apparatus includes: a source separation unit separating multi-channel source signals from a mixture including the multi-channel source signals; and a post-processing unit...

20060034362 - Apparatus for channel equalization using multi antenna and method thereof: The present invention provides an apparatus for channel equalization and method thereof, by which a digital signal received via a plurality of antennas is equalized. The present invention includes receiving digital transmission signals using a plurality of antennas, respectively, initializing equalizer coefficients and equalizing the received signals respectively, adding the...

20060034363 - System and method for time-domain equalization in discrete multi-tone system: A novel structure for the TEQ in a DMT system receiver to shorten the length of the effective channel impulse response is provided. A time-domain equalizer, based on the decision-feedback filter structure, along with a training method is disclosed. In accordance with the DFE-based TEQ in the DMT system, the...

20060034364 - Carrier synchronization to reduce common mode voltage in an ac drive: A method and apparatus for use with a power conversion configuration including a pulse width modulated (PWM) converter, a PWM inverter and master and slave carrier signal generators wherein the master and slave carrier signal generators receive master and slave PWM frequency signals and generate master and slave carrier signals...

20060034365 - Digital adaptive feedforward harmonic distortion compensation for digitally controlled power stage: A digital timing read back and an adaptive feedforward compensation algorithm to reduce harmonic distortion is disclosed. More specifically, the approach generates harmonic components digitally with the same magnitude but at an opposite phase to the output harmonic distortion. An anti-distortion signal is generated and added to the input signal....

20060034366 - Low-if multiple mode digital receiver front end and corresponding method: A data communications technique is provided that may be used in WLAN (Wireless Local Area Network) receivers. Data signals modulated in accordance with one of at least two different modulation schemes are received. The front end of the device has an analog and a digital part, and the digital front...

20060034367 - Method and apparatus to encode image, and method and apparatus to decode image data: A method and apparatus to encode an image and a method and apparatus to decode an image are provided. The apparatus to encode an image includes a first encoder to encode an omni-directional image to generate a first bitstream, a data communicator to transmit the first bitstream to a decoding...

20060034371 - Method and apparatus for encoding and/or decoding moving pictures: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix....

20060034372 - Method and apparatus for encoding and/or decoding moving pictures: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix....

20060034370 - Method and apparatus for interpolating a reference pixel in an annular image and encoding/decoding an annular image: A method and apparatus are provided for interpolating an object reference pixel in an annular image and a method and apparatus for encoding/decoding an annular image. The method of interpolating a reference pixel in an annular image comprises selecting a plurality of reference pixels arranged in the direction of a...

20060034369 - Method and system for parametric video quality equalization in selective re-encoding: In a video processing system, a method and system for parametric video quality equalization in selective re-encoding are provided. A frequency of compression occurrence for a picture coding type may be compared to a threshold level to determine whether virtual encoding through selective re-encoding is to be enabled. A current...

20060034373 - Local constraints for motion matching: A method and apparatus for estimating the motion of an image region (the “center” region) from a source video frame to a target video frame. The motion estimation is locally constrained in that the estimated motion of the “center region” is affected by the estimated motion of neighboring regions. Advantageously,...

20060034374 - Method and device for motion estimation and compensation for panorama image: A device and a method for motion estimation and compensation to be performed on a panorama image with a 360° omni-directional view based on that a spatial relation between left and right borders of the panorama image is very high. Accordingly, it is possible to improve an image quality through...

20060034368 - Generation and use of masks in mpeg video encoding to indicate non-zero entries in transformed macroblocks: During Motion Picture Experts Group (MPEG) video encoding a two-dimensional discrete cosine transform (DCT) is performed on data representing an original image. The resulting coefficients are then quantized, which typically results in many zero coefficients. Because of the nature of most video data, most higher-order coefficients are typically zero and...

20060034375 - Data compression unit control for alignment of output signal: To enable a single programme in a multiple programme MPEG transport stream (MPTS) to be replaced seamlessly by a locally generated programme, the local coder receives the MPTS as a reference signal and outputs transport packets in alignment with the packets of the programme to be replaced. Timing and other...

20060034377 - Adaptively configurable class-a/class-b transmit dac for transceiver emission and power consumption control: A power efficient and reduced electromagnetic interference (EMI) emissions transmitter for unshielded twisted pair (UTP) data communication applications. Transmit data is processed by a digital filter. The digital filter output data is converted to a current-mode analog waveform by a digital-to-analog converter (DAC). The digital filter is integrated with the...

20060034376 - System and method for detecting a device requiring power: A system and technique for detecting a device that requires power is implemented with a power detection station. The power detection system includes a detector having an output and a return which are coupled together by the device when the device requires power. The detector includes a word generator for...

20060034380 - Channel estimation for wireless systems with multiple transit antennas: In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols....

20060034378 - Papr reduction: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame...

20060034379 - Synchronization method and related apparatus of an ofdm digital communication system: A synchronization method and related apparatus of an OFDM digital communication system are disclosed for determining a position of a synchronization byte in a received signal. The method includes extracting a transmission parameter signal (TPS) from the received signal, determining a symbol number and a frame number corresponding to a...

20060034382 - Method and apparatus for subcarrier and antenna selection in mimo-ofdm system: A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. Channel metric is calculated for each of a plurality of transmit antennas. Sub-carriers are allocated to each transmit antenna in accordance with the channel metric of...

20060034381 - Method and apparatus using coordinate interleaving to increase diversity in a mimo system: A method to increase diversity in MIMO fading channels interleaves coordinates of complex symbol(s) in a transmission frame after encoding and modulating. Specifically, an input signal is encoded and modulated into a codeword, jointly across at least two pipes, said pipes having space, time, frequency, or other nature, wherein the...

20060034384 - Method and system for communicating data frames: For communicating data frames, a respective data frame is transmitted from each of a plurality of transmitter antennas of a transmitter. In addition, a power of any data field that is of a predetermined data type within the respective data frames is boosted to a maximum available power of the...

20060034386 - Method and system for rate-2 transmission: Signal encoding in a multiple input multiple output system in a wireless communication network is provided. The communication system provides a method of encoding and transmitting symbols in a rate-2 complex symbol per second per Hertz transmission system that achieves a maximum diversity of four for a four transmit antenna...

20060034387 - Method and system for utilizing space-time overlays for convolutionally coded systems: A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in response to the message signal. The code word...

20060034383 - Systems and methods for coding in broadband wireless communication systems to achieve maximum diversity in space, time and frequency: Maximum diversity in multiple antenna distributed frequency broadband systems such as MIMO-OFDM is achievable through space-frequency (SF) and space-time-frequency (STF) coding. Full-rate full-diversity coding is achieved through a combination of maximal minimum product distance symbol set design and formation of codeword blocks. Full-diversity codes are also achieved which have reduced...

20060034385 - Wireless communication apparatus and method for estimating number of antennas: wireless communication apparatus (transmitter) including a plurality of antennas for transmitting a plurality of known symbol sequences and data symbols, transmits the known symbol sequences, each of the known symbol sequences including a plurality of known symbols, each of the known symbols whose plural known information being carried on a...

20060034388 - Data sending device, data receiving device, transmission path encoding method, and decoding method: A data section is mapped such that the polarity of the signal level of each symbol is constantly inverted on a symbol by symbol basis. On the other hand, a header section is mapped such that the header section includes a distinguishing symbol for distinguishing the data section and the...

20060034390 - Method and system for maximum transmit diversity: A communication system is provided that includes signal encoding in a multiple input multiple output system. The communication system includes wireless communication networks. The communication system includes methods of encoding and transmitting symbols in a rate-1 complex symbol per second per Hertz transmission system while achieving maximum diversity. The communication...

20060034389 - Wireless transmitting device and method: A wireless transmitting device for use in communication with a wireless receiving device with a wireless packet, includes a plurality of antennas, and a signal generator to generate a signal for a wireless packet to be transmitted. The wireless packet includes an automatic gain control (AGC) preamble sequence and data...

20060034391 - Modulation device and transmitter comprising such a device: A signal modulation device comprises a delta-sigma modulator disposed for transforming an amplitude-modulation signal in baseband into a pulse signal. It also comprises a phase modulator receiving, at its input, analogue phase-modulation signals in baseband. The pulse signal is mixed with carrier signals upstream of the phase modulator. The modulation...

20060034393 - Apparatus, methods and computer program products for signal acquisition using common demodulation templates: A target modulation is detected in a signal, e.g., a radio signal received by a device such as a mobile communications terminal. Respective target modulation correlations for respective carrier timing hypotheses are determined by demodulating signal values corresponding to the signal for the respective carrier timing hypotheses using a common...

20060034392 - Demodulation method using soft decision for quadrature amplitude modulation and apparatus thereof: The present invention relates to a demodulation method using soft decision for QAM (Quadrature Amplitude Modulation). In a soft decision method for demodulation of a received signal of square QAM comprised of the same phase signal component and a orthogonal phase signal component, the demodulation method using soft decision has...

20060034394 - Circuit for adaptive sampling edge position control and a method therefor: A clock and data recovery circuit (CDR) for receiving high-speed digital data, and having an analog phase offset control capability, is improved by providing an adaptive sampling edge position control. A differential circuit samples the raw data signal at three closely spaced sampling points of the eye, and compares advanced...

20060034395 - Dual loop clock recovery circuit: A clock recovery circuit for digital data transmission includes a delay lock loop having a first loop which generates a phase difference signal which is indicative of a quantized phase difference between a data signal and a clock signal; and a second loop which generates a phase difference signal which...

20060034396 - Method and system for digital baseband receiver with digital rf/if/vlif support in gsm/gprs/edge compliant handsets: A method and system for digital baseband receiver with digital RF/IF/VLIF support in GSM/GPRS/EDGE compliant handsets. The method may comprise receiving an input signal which may be a digital RF signal, IF or VLIF signals, and the input signal may comprise of I and Q components. The serial digital RF...

20060034397 - Method and apparatus for transmitting and receiving preamble signal in a wireless communication system: Disclosed is an apparatus and a method for transmitting/receiving synchronization mode information in a wireless communication system. A transmission apparatus in the wireless communication system includes a mode information creating unit for creating operation mode information based on a determined utilized bandwidth, and a preamble generating unit for outputting a...

20060034398 - Reduced complexity sliding window based equalizer: Data estimation is performed in a wireless communication system using both oversampling and multiple reception antennas. A receive vector is produced for each antenna at a sampling interval which is a multiple of the chip rate of the received signal. A channel response matrix is produced for each antenna at...

20060034399 - Decoding apparatus and communication system receiver: A decoding apparatus and communication system receiver are provided that enable reception performance to be improved in a packet communication system in which the HARQ method is used. In a receiver in a communication system and a decoding apparatus of this receiver there are provided a reception quality measuring apparatus...

20060034401 - Apparatus and method for controlling a digital automatic gain controller in an orthogonal frequency division multiple access communication system: An apparatus and method for controlling a digital AGC in a communication system in which power changes significantly from frame to frame. In the digital AGC controlling apparatus, an SNR estimator estimates an uplink SNR of a next frame. A power measurer measures uplink received power of every frame. A...

20060034400 - Automatic gain control system with self-adaptive attack and decay time: A method of gain control by amplifying an input signal with a variable gain amplifier to generate an output signal where the gain of the variable gain amplifier is selected based upon a control signal presented at a control input of the variable gain amplifier. When the output signal is...

20060034402 - System and method for high-speed decoding and isi compensation in a multi-pair transceiver system: A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics...

20060034404 - High resolution digital clock multiplier: A high resolution programmable clock synthesizer that is portable across processes and, thus, process independent is disclosed herein. The clock synthesizer provides a dynamic solution, in that the frequency of the desired clock signal is programmable. Initially, a control unit monitors the input clock signal and the output clock signal...

20060034403 - Phase-locked loop having dynamically adjustable up/down pulse widths: According to embodiments of the present invention, a phase-locked loop (PLL) may include circuitry to select a wide pulse width for the phase-frequency detector control signal when the PLL is in a frequency acquisition stage, a narrow pulse width for the phase-frequency detector control signal when the PLL is in...

20060034406 - Apparatus for timing recovery and method thereof: The present invention provides an apparatus for timing recovery and method thereof. The present invention includes the steps of obtaining a symbol sample value by sampling a received baseband signal with a symbol sample rate and by performing a front-end processing on the sampled signal in a digital area, finding...

20060034405 - Method and apparatus for high-speed input sampling: A signal sampler and method for high-speed input sampling of a signal are disclosed. A first sampler samples a data signal at a rising edge of a clock signal and generates a first sampled signal. A second sampler samples the data signal at a falling edge of an inverted clock...

20060034407 - Base station synchronization: In a radio network controller (RNC), a covariant matrix and a database are updated. The RNC then detects that a first base station's time-error-variance exceeds a predetermined threshold. In response, the RNC signals to a user-equipment (UE) to measure a time difference of arrival (TDOA) between signals transmitted from the...

20060034408 - Clock generator having a 50% duty-cycle: A method and apparatus for generating a fifty percent duty cycle clock from a reference clock. The method and apparatus includes an edge generator, a controllable delay module, a duty cycle control loop module and a reset circuit. The edge generator is coupled to generate a clean edge of the...

20060034409 - Digital vco and pll circuit using the digital vco: A digital VCO includes an A/D converter (11) for converting a given analog signal to a digital signal, a quartz oscillation circuit (12) having a quartz oscillator for generating a signal having a predetermined frequency, and a variable divider circuit (13) for varying the division ratio according to the digital...

20060034411 - Method and apparatus of recording data on write-once recording medium: An apparatus of recording data on a recording medium includes an optical recording device and a microcomputer. The recording medium has a lead-in area, a lead-out area, and a data zone, where the data zone has a user data area and a spare area. When the microcomputer receives a command...

20060034410 - Pll with balanced quadricorrelator: A Phase Locked Loop (1) comprising a frequency detector (10) including a balanced quadricorrelator (2), the loop (1) being characterized in that the quadricorrelator (2) comprises double edge clocked bi-stable circuits (21, 22, 23, 24, 25, 26, 27, 28) coupled to multiplexers (31, 32, 33, 34) being controlled by a...

20060029124 - Reduced complexity soft value generation for mimo jd-grake receivers: A receiver includes a receiver circuit that decodes multiple signals of interest contained in a composite receive signal. The receiver comprises at least one Generalized RAKE combining circuit and a joint demodulation circuit and generates a detected signal at an output. The joint demodulation circuit contains a reduced search soft...

20060029125 - Layout processing method, information processing apparatus, and computer program: In a layout processing method of dynamically changing the layout of a template having a plurality of data areas in accordance with data presented to each of the plurality of data areas, a set of data areas associated by a link is extracted. For the plurality of data areas contained...

20060029126 - Apparatus and method for noise enhancement reduction in an adaptive equalizer: A method for noise enhancement reduction in an adaptive equalizer comprising a plurality of filter tap cells having respective coefficients and tap data values. First, a step size is determined based on a norm value of an ith parameter of an estimated channel response. The coefficient of the ith filter...

20060029129 - Video coding: A method of encoding a video signal representing a sequence of pictures, the method employing both non-temporal prediction and temporal prediction, wherein the method comprises, for each picture that forms a reference picture for the temporal prediction of another picture, associating with each such picture an indicator indicating the temporal...

20060029128 - Video encoding device and method: A video encoding device capable of performing a near-real-time encoding process while restraining deterioration in image quality. A first encoding section encodes a video signal to generate a first stream and extracts stream information including space- and time-related information of the video signal. A stream buffer stores video scenes of...

20060029130 - Method and apparatus for encoding and/or decoding moving pictures: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix....

20060029131 - Method and apparatus for encoding and/or decoding moving pictures: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix....

20060029132 - Method and apparatus for encoding and/or decoding moving pictures: A method of encoding moving pictures using a plurality of quantization matrices. The method involves selecting one of the plurality of quantization matrices in consideration of an at least one characteristics of an input image; transforming the input image; and quantizing the transformed input image using the selected quantization matrix....

20060029133 - System and method for bit-plane decoding of fine-granularity scalable (fgs) video stream: A method of inverse transform of bit-plane-oriented discrete cosine transform transformed data representing the enhancement layer of a frame of video date encopoded in a fine granularscability comprising: providing a lookup table comprissing a mtrix of numerical contributions based on location of a bit-plane cell within any bit-plane of a...

20060029127 - Controlling the distribution of different frames per second of a video stream to various recipients: This invention discloses a system for distribution of real time video signals including at least one video camera generating at least one video signal at a supply frame rate, and at least two video signal recipients receiving the at least one video signal at least two respective recipient frame rates...

20060029135 - In-loop deblocking filter: The in-loop deblocking filter for H.264 video coding has additional buffers for in-place filtering and minimizing memory transfers. One buffer holds a reconstructed macroblock plus columns of the left prior macroblock pixels for vertical edge filtering and plus rows of the top macroblock pixels for horizontal edge filtering; and the...

20060029136 - Intra-frame prediction for high-pass temporal-filtered frames in a wavelet video coding: A method of encoding a sequence of frames using 3-D decomposition including temporal filtering and using intra-frame prediction/interpolation, comprises (a) a first stage of intra-prediction/interpolation in which any neighbouring blocks may be used; (b) evaluating the intra-prediction/interpolation of step (a) for each block to identify blocks for intra-frame prediction; (c)...

20060029137 - Method, medium, and apparatus predicting direct mode motion of a multi-angle moving picture: A method, medium, and apparatus predicting direct mode motion of a multi-angle moving picture on a temporal and spatial basis. The method may include locating a block to which a co-located block of a block for which coding is sought makes reference with a motion vector, calculating a forward motion...

20060029134 - System and process for compressing and decompressing multiple, layered, video streams employing spatial and temporal encoding: A system and process for compressing and decompressing multiple video streams depicting substantially the same dynamic scene from different viewpoints. Each frame in each contemporaneous set of video frames of the multiple streams is represented by at least a two layers—a main layer and a boundary layer. Compression of the...

20060029138 - Leakage nulling receiver correlator structure and method for ultra wide bandwidth communication system: A receiver correlator structure for an ultra wide bandwidth communication system includes an antenna, a mixer, a bandpass filter, and a convertor. The receiver receives, via the antenna, an ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions, and transmits the received ultra wide bandwidth...

20060029139 - Data transmission synchronization scheme: A data transmission synchronization system provides a method for transmitting a stream of continuous audio and/or video data from a transmitter to a receiver on a communication link where the system determines if synchronization information is present in a data source. If no synchronization information is present, the system generates...

20060029140 - Digital wireless communications device: A digital wireless communications device enabling call distance to be increased while avoiding mute processing as far as possible, even if code error occurs in an ADPCM code. The digital wireless communications device may be configured to include: an error detector for detecting code error in an ADPCM code received...

20060029141 - Method and apparatus for modulating and demodulating data into a variable length code and a providing medium for implementing the method: A SYNC bit inserting section 14 adds a sync signal to a train of codes, after adding a minimum run, said sync signal having a pattern that breaks a maximum run. It is thereby possible to provide a reliable sync signal pattern....

20060029144 - Frequency domain equalization: A radio receiver 102 is provided. The radio receiver 102 comprises one or more data Fast Fourier Transformers, each data Fast Fourier Transformer operable to perform a Fast Fourier Transform on an input data block, one or more impulse response Fast Fourier Transformers, each impulse response Fast Fourier Transformer operable...

20060029143 - Ofdm system receiver apparatus suppressing inter-symbol interference: An receiver apparatus according to an OFDM system includes a inter-symbol interference suppressing unit configured to modify to a predetermined content a portion of a dominant wave included in a received signal and to modify to a predetermined content a portion of at least one delayed wave included in the...

20060029142 - Simplified narrowband excision: An improved ingress cancellation filter comprising a Fast Fourier Transform circuit which replaces the analysis filter bank of the prior art to break the incoming signal down into sub bands, an ingress cancellation filter that weights each sub band based upon the probability that the sub band is corrupted by...

20060029145 - Method and apparatus for encoding interleaving and mapping data to facilitate gbps data rates in wireless systems: A method and apparatus for encoding data for wireless transmission. The invention includes multi-level coding in which data is partitioned between two encoders, one for encoding Most Significant Bits (MSBs) and the other for encoding Least Significant Bits (LSBs). By partition bits separately for the MSBs and LSBs, the complexity...

20060029149 - Method and apparatus for receiving signals in mimo system: An improved receiver for a multicarrier-based MIMO (Multiple-Input Multiple-Output) system is provided. A MIMO receiving apparatus includes a detection priority decision unit, which receives via N receiving antennas signals transmitted from M transmitting antennas and determines the detection priorities of the signals, and a signal detector, which successively detects the...

20060029147 - Method and apparatus for training using variable transmit signal power levels: A method and apparatus for a multiple channel communication device training, and processing utilizing a transmit signal power control operation. Multiple channel communication devices utilize inter-channel crosstalk mitigation techniques, such as MIMO processing modules or MIMO precoding systems, to cancel unwanted crosstalk coupling across active and provisioned channels. Upon provisioning...

20060029148 - Method and apparatus for training using variable transmit signal power levels: A method and apparatus for a multiple channel communication device training, and processing utilizing a transmit signal power control operation. Multiple channel communication devices utilize inter-channel crosstalk mitigation techniques, such as MIMO processing modules or MIMO precoding systems, to cancel unwanted crosstalk coupling across active and provisioned channels. Upon provisioning...

20060029146 - Multi-antenna communication systems utilizing rf-based and baseband signal weighting and combining: A receiver operatively coupled to an antenna structure capable of receiving a first plurality of RF signals is disclosed herein. The receiver includes an RF processing network operative to perform weighting and combining operations within the RF domain using the first plurality of RF signals so as to produce a...

20060029150 - Method for receiving an ofdm signal: The method is for receiving an OFDM signal according to which, during a frequency translation phase, there is introduced a phase and gain imbalance between the phase and quadrature components thereof, and a frequency offset relative to a main carrier of the OFDM signal. The method involves a compensation of...

20060029151 - Capacitive data link: A capacitive data link includes a first capacitive element. A signal producing entity may be operatively coupled to the first capacitive element and configured to apply an information-carrying electrical signal to the first capacitive element. A second capacitive element may be spaced apart from the first capacitive element and configured...

20060029152 - Digital communications transmitter with synthesizer-controlled modulation and method therefor: A low-power digital communications transmitter (20) includes a programmable digital-processing circuit (22), which may be provided by a digital signal processor (DSP), a programmable direct digital synthesizer (DDS), and a constant-envelope, high power amplifier (32). The DDS (24) is programmed to provide pulse-shaping and IF/RF signal modulation functions. The digital-processing...

20060029153 - Digital time alignment in a polar modulator: Methods of and apparatus for digitally controlling, with sub-sample resolution, the relative timing of the magnitude and phase paths in a polar modulator. The timing resolution is limited by the dynamic range of the system as opposed to the sample rate. The methods and apparatus of the invention use a...

20060029155 - Distortion compensating apparatus, compressed data generating method: To shorten the time required for writing of the distortion compensation coefficient and to reduce amount of data of the distortion compensation coefficient stored as the initial value of the distortion compensation apparatus. The distortion compensation apparatus for amplifying the transmitting signal after implementing the distortion compensation process comprises a...

20060029154 - Distortion compensation device and distortion compensation method: A compensation data table 304 generates baseband signal nonlinear characteristic information. A determination section 305 determines from measured power whether power is on an upward trend or on a downward trend. An IM unbalance compensation computation section 306 generates an unbalance IM characteristic so that an amplitude component and phase...

20060029156 - Mobile telecommunication terminal device mobile telecommunication method, and mobile telecommunication control program: A mobile telecommunication terminal device is provided which is capable of preventing an excessive increase in transmitting power to be fed from a base station even if a burst error occurs in a mobile unit. The mobile telecommunication terminal device has an error frequency calculating section to calculate a frequency...

20060029157 - Wireless precoding methods: Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna preceding block, a transform block, and multiple transmit antennas. The antenna preceding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent...

20060029158 - Amplitude peak cancellation: A method of preventing amplitude peaks from appearing in a processed signal that has been generated from at least one baseband signal by one or more signal processing operations is described. The method includes two or more individual peak cancellation steps, each peak cancellation step including deriving an estimate for...

20060029159 - Method of selecting demodulation scheme and digital broadcast receiver using the same: A method and apparatus for efficiently selecting a demodulation scheme for a particular channel in a digital broadcast receiver supporting a plurality of demodulation schemes are provided. The method includes receiving the digital broadcast signal of the channel; attempting demodulation of the digital broadcast signal using a demodulation scheme corresponding...

20060029160 - Quarter-rate clock recovery circuit and clock recovering method using the same: A quarter-rate clock recovery circuit includes a clock generator, a phase interpolation unit, a phase detector, and a controller. The clock generator generates first through fourth clocks having a quarter frequency of a data-rate of input data, the second, third and fourth clocks have phase differences of 90, 180, and...

20060029161 - Technique to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards: A technique is described for simultaneously and synchronously transmitting digital data and a clock signal in a digital integrated circuit, circuit board, or system. The technique is based on the phase shift keying (PSK) modulation of an RF high frequency carrier which is distributed on low impedance interconnection transmission lines....

20060029165 - Channel estimation sequence and method of estimating a transmission channel which uses such a channel estimation sequence: According to the present invention, the said two complementary sequences (s and g) are extended periodically by extensions (esf, esd and egf, egd) which constitute replicas of their starting part and/or ending part and which are respectively concatenated at the end and/or start of the sequence. The present invention also...

20060029163 - Frequency burst detector and related detection method thereof: A receiving apparatus for receiving a signal is disclosed. The receiving apparatus includes a first block power calculator for evaluating a plurality of block powers of the signal, a band pass filter for filtering the signal and outputting a specific frequency component of the signal, a second block power calculator...

20060029162 - Modular multi-bit symbol demapper: A modular multiple bit symbol demapper (1000) that processes pre-detected symbol values for multiple bit symbols. A symmetry of data bit decisions around higher order data bits is used to iteratively fold, by taking an absolute value (1204, 1208) in the exemplary embodiment, pre-detected values around a lower order bit...

20060029164 - Wired/wireless communication receiver and method for improving performance of equalizer through multipath delay spread estimation: A wired/wireless communication receiver includes an equalizer through multipath delay estimation and a signal receiving method. The receiver includes a delay spread estimation unit, a factor updating unit, and an equalizer. The delay spread estimation unit estimates a delay spread value of a received signal and uses a symbol boundary...

20060029167 - Apparatus and method for sharing viterbi decoder in mobile communication system: An apparatus and method are provided for decoding data of first and second control channels in a mobile communication system providing multi-media services including voice and data services. The apparatus includes an input section for selectively outputting data stored in first and second control channel input sections which store data...

20060029166 - Soft adaptive viterbi equalizing method and related apparatus thereof: An adaptive Viterbi equalizing method and a related apparatus are disclosed. The apparatus includes a match filter for equalizing a plurality of original symbols of a received signal to generate a plurality of equalized symbols according to a plurality of channel responses, a Viterbi detector for generating a soft-decision value...

20060029168 - Method for near optimal joint channel estimation and data detection for cofdm systems: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in...

20060029169 - Using siso decoder feedback to produce symbol probabilities for use in wireless communications that utilize single encoder turbo coding and transmit diversity: An apparatus and method for transmitting and receiving a bit stream. On the transmission side, coded bits (Y.sub.t) and an interleaved version of the coded bits (X.sub.t) are separately modulated and transmitted. On the reception side, a priori output probabilities produced by a probability generator (34) are combined (112) and...

20060029170 - Channel select filter and applications thereof: A channel select filter having channel equalization includes a first low pass filter stage, a gain stage, a subtraction module, and a second low pass filter stage. The first low pass filter stage is operably coupled to filter input signals to produce first low pass filtered signals. The gain stage...

20060029171 - Radio receiver and/or transmitter including a programmable equalizer: A radio receiver includes a low noise amplifier, a down conversion module, an analog to digital converter, and a digital demodulator. The low noise amplifier is operably coupled to amplify inbound radio frequency (RF) signals to produce amplified inbound RF signals. The down conversion module is operably coupled to convert...

20060029172 - Method and arrangement for generating an output clock signal with an adjustable phase relation from a plurality of input clock signals: A method and an arrangement are provided for generating an output clock signal (o), in which a plurality of input clock signals (s, c) that have a predetermined phase relationship to one another, are weighted with respective weighting factors (A, 1-A), and in which the weighted input clock signals (s′,...

20060029173 - Method and apparatus for output data synchronization with system clock in ddr: A method and apparatus for substantially reducing or eliminating the timing skew caused by delay elements in a delay locked loop. A method and apparatus is disclosed wherein a rising edge of a local timing signal is established and phase-locked to a rising edge of a system clock signal by...

20060029174 - Transceiver having a jitter control processor with a receiver stage and a method of operation thereof: The present invention provides a transceiver couplable to a communications network having a jitter control processor and method of operating the same. In one aspect of the present invention, the jitter control processor of the transceiver includes a receiver stage. The receiver stage includes: (1) a receive time error measurement...

20060029176 - Data transmission synchronization: Systems and methods provide synchronization techniques across a number of communication channels. For example, in accordance with an embodiment of the present invention, a synchronization scheme is disclosed for synchronizing across multiple data transmission channels, with each transmission channel multiplexing parallel data into serial data....

20060029175 - Digital frequency locked delay line: A device includes a signal generator having a delay locked circuit for providing a number of output signals based on an input signal. The output signals have a fixed signal relationship with each other and with the input signal. The signal generator also includes a selector for selecting an enable...

20060029177 - Unified digital architecture: A unified, unidirectional serial link is described for providing data across wired media, such as a chip-to chip or a card-to-card interconnect. It consists of a transmit section and a receive section that are operated as pairs to allow the serial data communication. The serial link is implemented as part...

20060023770 - Spread spectrum clock generator: A spread spectrum clock generator comprising a phase-locked loop circuit and a modulation circuit. The phase-locked loop circuit receives a reference signal at a reference frequency and outputs an output signal at an output frequency periodically varying in a range between upper predetermined boundary and lower predetermined boundary frequencies. The...

20060023771 - System and method for the mitigation of spectral lines in an ultrawide bandwidth transceiver: A method apparatus are provided for mitigating spectral lines in a wireless signal. First a code word is generated that is made up of a plurality of binary or ternary encoded pulses. Then a plurality of code-word-modulated wavelets are generated in response to the code word. These wavelets can be...

20060023772 - Method and system for performing channel estimation in a multiple antenna block transmission system: Methods and systems for performing channel estimation in a multiple antenna block transmission system are provided so as to improve the channel estimation quality and/or the delay spread of the channels that can be estimated....

20060023773 - Transmission apparatus and peak reduction method: There is a problem that a delay is caused in signal processing by exercising control so as to cause amplitude peaks in a transmission signal to fall in a prescribed range. A transmission apparatus for conducting wireless communication makes a decision whether a specific pattern which causes a peak exceeding...

20060023774 - Apparatus and method for hybrid traffic and pilot signal quality determination of finger lock status of rake receiver correlators: Provided are improved systems and methods for spread spectrum communication employing hybrid Eb/No and pilot-based finger lock determination for RAKE receivers. Finger lock thresholds are periodically set using an extended time-averaged Eb/No traffic signal estimate for each finger mapped to an Ec/No pilot level, where the extended time-averaged Eb/No estimate...

20060023776 - Correlator for spread spectrum receiver: The present invention discloses correlation architecture in the application of full-digital GPS (Global Positioning System) receivers. According to the present invention, a satellite C/A code generator is employed to generate N-bit parallel code data at a time, and a Doppler frequency generator is used to generate N-bit parallel Doppler frequency...

20060023775 - Method and apparatus to estimate signal to interference plus noise ratio (sinr) in a multiple antenna receiver: In one aspect this invention provides a method to operate a receiver, and includes applying signals received from at least first and second antennas to corresponding first and second finger pairs, where each finger pair comprises a first finger member and a second finger member, and outputting traffic symbols and...

20060023777 - Signal transmission: The invention relates to a system for contact-free signal transmission and energy transmission comprising a transmitter apparatus for the transmission of a digital signal which includes at least one measurement signal generated by means of a measuring device, in particular a measurement signal digitized by means of an A/D converter...

20060023778 - Method of determining jitter and apparatus for determining jitter: In accordance with illustrative embodiments, methods and apparati, which determine jitter are described. In one example embodiment, a method includes receiving a signal, wherein the signal comprises a first data pattern which was generated at a first bit rate. The method also includes sampling the signal at a second bit...

20060023779 - Equalizers, receivers and methods for the same: An equalizer may include an equalizer circuit and a controller. The equalizer circuit may generate an equalized signal based on a control code and input data. The controller may generate the control code based on a transition information signal having information on a number of data transitions in each clock...

20060023780 - Equaliser circuit: One embodiment of an equaliser circuit has an FIR filter 116 in the asynchronously oversampled domain with a filter coefficient adaptation module that adapts the filter coefficients to the transfer function of a data read channel. Applications include tape drives, drives for optical and magnetic discs as well as receivers....

20060023781 - Digital pwm controller with efficiency optimization: A method is disclosed for optimizing the efficiency of a digital switched power supply having a plurality of switches responsive to generated pulse control signals. The process involves varying the initiation of conduction in at least one of the switches relative to the conduction in another of the switches by...

20060023782 - System and method for off-line multi-view video compression: Interactive multi-view video presents new types of video capture systems, video formats, video compression algorithms, and services. Many video cameras are allocated to capture an event from various related locations and directions. The captured videos are compressed and are sent to a server in real-time. The compressed video can also...

20060023783 - Tertiary content addressable memory based motion estimator: Presented herein are Tertiary Content Addressable Memory based motion estimator(s). In one embodiment, there is presented a method for encoding a picture. The method comprises storing a reference picture in a memory; taking samples from at least one line of a prediction block; generating at least one data word, the...

20060023784 - Tertiary content addressable memory based motion estimator: Presented herein are Tertiary Content Addressable Memory based motion estimator(s). In one embodiment, there is presented a method for encoding a picture. The method comprises addressing a first memory with one or more data words for a first prediction block, and addressing a second memory with one or more data...

20060023785 - Tertiary content addressable memory based motion estimator: Presented herein are Tertiary Content Addressable Memory based motion estimator(s). In one embodiment, there is presented a method for encoding a picture. The method comprises storing a reference picture in a memory; taking samples from at least one line of a prediction block, wherein each of the samples comprises a...

20060023789 - Decoding device and decoding program for video image data: A decoding device comprises a cache memory for temporally storing video image data, a unit for determining a position of a reference macroblock corresponding to a macroblock to be decoded based on a motion vector obtained by analyzing an encoded bitstream, and a unit for determining whether or not a...

20060023791 - Method and apparatus for decoding moving picture to which post filtering is applied: Provided is a moving picture decoding method and apparatus. The decoding method includes storing coding information on a certain block and neighboring blocks, deriving a filtering coefficient to filter a boundary between blocks and predicting a motion vector of a certain block, based on the stored information, and filtering the...

20060023786 - Method and system for estimating global motion in video sequences: The invention relates to estimating the global motion between frames of a motion-compensated inter-frame encoded video sequence, directly from the motion vectors encoded within the frames. For any particular frame, a motion estimation is determined from motion vectors direct from the frame's anchor frame to the frame in question. This...

20060023790 - Method for processing motion information: A method for processing video image is provided to perform a motion vector filtering process on the image after being processed by a motion estimation process. The motion vector filtering process adjusts the motion vectors derived for each block in a video sequence, so that the motion vector of each...

20060023788 - Motion estimation and compensation device with motion vector correction based on vertical component values: A motion estimation and compensation device that avoids discrepancies in chrominance components which could be introduced in the process of motion vector estimation. The device has a motion vector estimator for finding motion vectors in given interlace-scanning chrominance-subsampled video signals. The estimator compares each candidate block in a reference picture...

20060023787 - System and method for on-line multi-view video compression: Interactive multi-view video presents new types of video capture systems, video formats, video compression algorithms, and services. Many video cameras are allocated to capture an event from various related locations and directions. The captured videos are compressed and are sent to a server in real-time. A big difference from the...

20060023793 - Image encoding device: The present invention has a characteristic pixel extractor 0309 which encodes input images by small region unit in accordance with an irreversible compression method, decodes the encoded data which is created, and utilises the input image and decoded image obtained after decoding to extract characteristic pixels, a characteristic distortion calculator...

20060023792 - Memory mapping apparatus and method for video decoder/encoder: A memory mapping apparatus and a method in a video decoder/encoder utilize a dividing unit, a storage unit and a memory allocation unit. The dividing unit divides picture data into macroblocks and divides each of the macroblocks, which are units of encoding, into partitions having a predetermined size. A storage...

20060023794 - Method and system for noise reduction in digital video: Aspects of noise reduction in digital video may comprise monitoring at least one of memory usage and memory bandwidth usage of memory utilized to process video data. The aspect may further comprise adaptively adjusting filtering of the video data according to the monitoring. At least one of impulse filtering, temporal...

20060023795 - Binary arithmetic decoding apparatus and methods using a pipelined structure: Binary arithmetic decoding methods and apparatus are provided. A first decoded bit and a first set of decoding parameters are generated using a previously generated set of decoding parameters. A second decoded bit and a second set of decoding parameters are generated using the first set of decoding parameters. If...

20060023796 - Ask communication device: A master station includes a main clock generator using a high precision oscillator such as a crystal oscillator or a ceramic oscillator, and generates a carrier signal used for ASK modulation of a transmission signal in response to the clock signal outputted from the main clock generator. A slave station...

20060023797 - Signal transmitting/receiving system and method, signal transmitting apparatus and method, signal processing apparatus and method, recording medium, and program: A signal transmitting/receiving system and method, signal transmitting apparatus and method, signal processing apparatus and method, recording medium, and program are provided. A signal transmitting/receiving system includes a transmitter configured to transmit signals; and a receiver configured to receive the signals transmitted from the transmitter. The transmitter transmits signals using...

20060023799 - Apparatus for channel equalization and method thereof: Channel Equalization of a digital TV is disclosed. In channel equalization for restoring an original signal from a digital TV reception signal having passed through a channel, the present invention includes estimating an impulse response of the channel from a received signal having passed through the channel using conjugate-gradient algorithm,...

20060023800 - Ofdm signal demodulator circuit and ofdm signal demodulating method: When an OFDM demodulator circuit performs the waveform equivalence of carrier signals outputted from an FFT processing circuit, the OFDM demodulator circuit extracts correction coefficients corresponding to the gain of a reception signal outputted from a tuner unit from a correction coefficient table, and phase corrections are performed in a...

20060023798 - System, modem, receiver, transmitter and method for improving transmission performance: A system, modem, receiver, transmitter and method for improving transmission performance. A coefficient may be calculated using a received signal. A process may be performed on at least one data packet scheduled for transmission based on the calculated coefficient. The process may improve transmission performance....

20060023801 - Versatile system for optimizing transmit diversity in wireless communications: The present invention provides a versatile system for optimizing pilot pattern diversity in a digital communications system—particularly in multiple antenna OFDM communications systems. According to the present invention, a receiving device within a communications system may receive transmissions from a first transmitting device (202) and a second transmitting device (204),...

20060023802 - Concatenated coding of the multi-band orthogonal frequency division modulation system: The present disclosure is directed to a transmitter 200 that includes a first block encoder 450 operable to block encode at least a first portion of a multi-band orthogonal frequency division modulation signal. The transmitter 200 also includes a convolution encoder 304 operable to convolution encode the output of the...

20060023804 - Scalable time-switched preamble supplment generator, method of generating and multiple-input, multiple-output communication system employig the generator and method: The present invention provides a time-switched preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas wherein N is at least two. In one embodiment, the time-switched preamble supplement generator includes an initial preamble supplement formatter configured to provide a first permutation of a set...

20060023803 - System and method for distributed input-distributed output wireless communications: A method is described comprising: transmitting a training signal from each antenna of a base station to each of a plurality of client devices, each of the client devices analyzing each training signal to generate channel characterization data, and transmitting the channel characterization data back to the base station; storing...

20060023805 - Ask communication device: An ASK communication device has a carrier signal generator which is connected to a bus line which outputs carrier signals. One of ECUs, which attempts to transmit data, attenuates carrier signals superimposed on the bus line with predetermined timing by use of a transmission switch and a signal attenuator thereby...

20060023806 - Method and system for interactive channel equalization: A method and system for interactive channel equalization uses channel status information included in data packets. The system includes a first station adapted to transmit a first data packet including a channel status information segment over a radio communication channel as a first signal. A second station in the system...

20060023807 - Distortion compensating apparatus: A distortion compensation apparatus shortens the time until start of the transmission. The distortion compensating apparatus for amplifying the transmitted signal after implementation of the distortion compensation process thereto comprises a coefficient memory operable to store coefficients used for the distortion compensation process, an initial value memory operable to store...

20060023808 - Compositions, kits, and methods for calibration in mass spectrometry: The invention provides compositions, kits, and methods for calibrating a mass spectrometer using two or more recombinant proteins and one or more energy-absorbing molecules. The recombinant proteins of the invention display high purities, making them suitable for use in mass spectrometry....

20060023809 - System for demodulation of phase shift keying signals: The invention particularly relates to a system for demodulation of PSK signals which takes advantage from the effects that the locking of resonant circuits by superharmonic injection produce, together with the interference phenomena, and more particularly it relates to a demodulation system which is designed to avoid mutual locking between...

20060023810 - Carrier recovery system and method thereof: A carrier recovery system includes an in-phase mixer for mixing an incoming signal with an in-phase reference signal to produce an in-phase baseband signal; a quadrature-phase mixer for mixing the incoming signal with a quadrature-phase reference signal to produce a quadrature-phase baseband signal; a DC detector for measuring a DC...

20060023811 - Digital i/q demodulator suitable for use in wireless networks and an associated method of demodulating an rf signal: A digital in-phase/quadrature (I/Q) demodulator for use in RF receivers, wireless base stations, wireless mobile stations and other components of wireless networks. The digital I/Q demodulator extracts and resolves I and Q components of a demodulated digital data signal from a modulated digital data signal input thereto. The digital I/Q...

20060023812 - Providing correction for carrier frequency offset in multi-carrier communication systems: A receiver device provided according to an aspect of present invention accurately recovers streams of symbols encoded in corresponding sub-channels of a multi-carrier signal. Such a feature is attained by first recovering erroneous symbols (which are not yet corrected for carrier frequency offset) from the sub-channels, and then processing the...

20060023813 - Apparatus and method for integration of tuner functions in a digital receiver: A receiver to process a RF input signal having a plurality of channels includes a direct down conversion circuit, a demodulation circuit, and a local oscillator circuit. The direct down conversion circuit provides a downconverted signal based on the RF input signal and a local oscillator signal. The demodulation circuit...

20060023814 - Efficient implementation of gsm/gprs equalizer: The disclosed invention provides a method, a system and a computer program product for the maximum likelihood sequence estimation of transmitted MSK symbols. The disclosed invention provides a set of optimizations of the Viterbi algorithm for equalizing MSK symbols. The transmitted MSK symbols are alternately real and imaginary. Therefore, based...

20060023815 - Method for iterative decoder scheduling: A method for scheduling a decoding process of coded data blocks transmitted over a link in a communication network. According to the method the coded data block is stored in a queue (71) if all decoders of a cluster (72) of iterative parallel decoders are unavailable. When any of the...

20060023816 - Sliding-window decoder with prolog-windows having flexibel sizes: Sliding-window decoders with processor-systems (1) for decoding streams of symbols run prolog deriving processes (23) for deriving initial parameters for prolog-windows, and run main deriving processes (24) for deriving main parameters for main-windows thereby using initial conditions defined by said initial parameters. By introducing defining processes (22) for defining the...

20060023817 - Enhanced viterbi equalizer and algorithm: A device (1) for receiving a distorted signal, in particular an optical signal converted by an opto/electrical converter (2), comprises an electrical low-pass filter (3), an analog/digital converter (4), and a Viterbi equalizer (5). The bandwidth of the electrical low-pass filter (3) and the sampling rate of the device (1)...

20060023818 - Image enhancement apparatus and method in wireless system: In a method of wirelessly transmitting an audio and/or video input signal having a standard definition (SD), the input signal is converted to a signal having a high definition (HD) and noise is removed from the converted signal. High definition encoding is performed to the noise-free signal and the encoded...

20060023819 - Clock synchronizer: A clock synchronizer for effectuating data transfer between first and second clock domains by utilizing first and second synchronizer controllers. The first synchronizer controller circuit operates in the first clock domain which has N first clock cycles and the second synchronizer controller circuit operates in the second clock domain which...

20060023820 - Controller for clock synchronizer: A controller arrangement and method for effectuating data transfer between a first clock domain and a second clock domain. In one embodiment, inversion circuitry inverts a first clock signal associated with the first clock domain into an inverted first clock signal that is used in effectuating a SYNC pulse during...

20060023821 - Resampler for a bit pump and method of resampling a signal associated therewith: A resampler, method of resampling a signal and a bit pump and transceiver employing the same. In one embodiment, the resampler includes an interpolation stage, coupled to an input of the resampler, that receives a one-bit input signal representing at least a portion of a receive signal propagating along a...

20060023822 - Electronic circuit: One embodiment of a method of generating a clock signal and synchronizing the generated clock signal with a digital data stream comprises generating a clock signal using an oscillator, identifying a transition in a portion of the data stream, and synchronizing a transition of the clock signal with the identified...

20060023823 - Apparatus for frequency synchronization and method for the same: An apparatus and method for frequency synchronization is proposed to obtain the pilot tones and evaluate the frequency offset and time offset for frequency synchronization. The frequency synchronization method has the following steps: filtering a baseband signal of a frequency correction burst by using multiple pre-filters; measuring the baseband signal...

20060023824 - Method and device for extracting a clock frequency underlying a data stream: A device for extracting a clock frequency underlying a data stream includes means for controlling a controllable oscillator, coarse-tuning means and fine-tuning means, wherein coarse-tuning means responds to a second data pattern present in the data stream and sets the oscillator coarsely based on its length. Fine-tuning means responds to...

20060023825 - Device and method for synchronous data transmission using reference signal: A data transmitter and a data receiver generate respective synchronous signals from a common reference signal. The data receiver adjusts a phase of a first clock signal using each one of one-bit data signals each consisting of a single bit of received parallel data, so that a setup time and...

20060023826 - Carrier phase detector: with the boundary phase area in each case being arranged symmetrically with respect to a mid-phase (φmid) which is located in the centre between the two nominal phases (φnom) of equidistant nominal data symbols (Enom), and having a phase extent which is determined by a boundary phase (φg)....

20060023827 - Clock signal extraction device and method for extraction a clock signal from data signal: The invention provides a clock signal extraction device for extracting a clock signal from a periodic data signal, comprising a phase detector (104, 106) for detecting a first phase difference between rising edges of said data signal and a rising edges clock signal and for detecting a second phase difference...