Pulse or digital communications inventions 09/06

20060209923 - Method of transmitting feedback information in a multi-input, multi-output (mimo) system: A method of transmitting feedback information in a Multi-Input, Multi-Output (MIMO) system is disclosed. In the method, a mobile station (MS) which determines to transmit feedback information and feedback type to a base station (BS) without solicitation from the BS, wherein the feedback type is transmission antenna type, and transmits...

20060209922 - Single-pulse and multi-pulse transmitted reference impulse radio systems with energy detecting receivers: A transmitted reference ultra-wide band communication signal embodied in an electromagnetic wave and configured to communicate a data value includes a first frame having a first reference pulse and a first data pulse. The first reference pulse has a reference polarity and the first data pulse has a data polarity....

20060209924 - Adaptive delay adjustment for transmitted reference impulse radio systems: A method determines a delay time between reference and data pulses in a time-hopping impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. The delay time frame between the reference and data pulses is then determined according to the channel state information....

20060209925 - Synchronous data transmission from plural remote radio devices in w-cdma base station: A W-CDMA base station is disclosed in which a base band processing device and a plurality of remote radio devices are provided and downward data is transmitted from the plurality of remote radio devices at the same time. The base band processing device inserts a synchronous signal into downward data,...

20060209926 - Communication device and communication method: A chaos spreading code c(n) is inputted to a spreading unit 32. Data D1 and c(n) are multiplied in the spreading unit 32. A chaos spreading code d(n) is inputted to a spreading unit 42. Data D2 and d(n) are multiplied in the spreading unit 42. The chaos spreading codes...

20060209928 - Method and apparatus for multiple access over a communication channel: This invention is a multiple access communication technique by which a multitude of transmitters communicate with receivers using direct sequence spread spectrum signaling. The direct sequence codes are reused by a large number of simultaneous transmitters, so the system is named Code Reuse Multiple Access (“CRMA”). This reuse method requires...

20060209927 - Signal acquisition in a wireless communication system: Each base station transmits a TDM pilot 1 having multiple instances of a pilot-1 sequence generated with a PN 1 sequence and a TDM pilot 2 having at least one instance of a pilot-2 sequence generated with a PN2 sequence. Each base station is assigned a specific PN2 sequence that...

20060209929 - Decoding device, adapted for a transmission system using direct sequence spread spectrum: This device comprises several finite response filters (FLT1 to FLT4) each of which receives the digital input signal (E), a clock circuit (CLK_GEN) outputting clock signals (CLK1 to CLK4) to the filters with a frequency equal to the frequency at which symbol elements are produced and uniformly distributed phase shifts,...

20060209931 - Apparatus and method of canceling interference: Briefly, a wireless communication device having a receiver includes a pilot signal interference canceller and a linear interference suppressor is provided. The pilot signal interference canceller and the linear interference suppressor jointly operate to cancel a pilot signal interference and other interference which are part of a received signal. A...

20060209932 - Channel estimation for single-carrier systems: Systems and methods are provided for processing path components in a wireless communications network. A communications system is provided that includes one or more path analyzers to determine path magnitudes with respect to a set of channel paths employed in a wireless communications network. Such analysis can include analog or...

20060209933 - Method and apparatus for compensating for phase noise of symbols spread with a long spreading code: A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before...

20060209930 - Quadrature multi-frequency ranging (qmfr) applied to gps multipath mitigation: A quadrature multi-frequency ranging system applied to DSSS multipath mitigation problems is described. The QMFR techniques include taking the time-of-arrival measurements on the received signal at a time when the multipath component is at a 90 degree angle to the direct path. Further, the preferred embodiment of the present invention...

20060209936 - Matched filter and spread spectrum receiver: A matched filter for implementing the correlation of an input signal and a reference signal. The matched filter comprises N parallel M-sample long shift registers for receiving an equal number of input signals at the sampling frequency of the input signal, wherein N≧2, and then multiplexes one of the input...

20060209935 - Method and apparatus for performing signal processing using historical correlation data: A method and apparatus for estimating a satellite signal parameter in a satellite positioning system receiver is described. In an example, a plurality of correlation results between a satellite signal and a reference signal is generated and stored in a memory. At least one satellite signal parameter is estimated from...

20060209934 - Reception of multiple code length cdma transmissions: Code synchronization is acquired as a part of receiving and decoding a spread spectrum transmission. There are received a number of signal samples that constitute a signal sample sequence. It represents a length of a received signal spread with one full length of a pseudorandom sequence used as a spreading...

20060209937 - Adaptive modulation transmission system, transmission device, reception device, and method thereof: An adaptive modulation transmission system is disclosed that is capable of assigning a combination of a modulation parameter and a code multiplicity according to a user requirement and a propagation path condition between a transmission device and a reception device. The transmission device includes a signal modulation unit to modulate...

20060209938 - Methods and circuits for power management in a transceiver: A transceiver circuit having 10 mb and 100 mb transmit and receive circuitries using the power saving methods of the present invention is disclosed. The power consumption of the transceiver circuit can be significantly reduced by providing each defined subcircuit with its own power supply and means of activation and...

20060209939 - Adaptive coding for a shared data communication channel: A method, system and apparatus for determining a block format to be used to transmit a block of data over a channel to a receiver by collecting a series of reception-quality measurements, determining the rate of change of the reception-quality or the rate at which retransmission requests are being made,...

20060209940 - Installation for distributing digital signals: The invention concerns a digital signal distributing installation comprising a first coupler to be connected to an ADSL line input and to an electric power distribution line, an ADSL modem with a first and a second port, and a second coupler to be connected to the first port of the...

20060209941 - Method for synchronizing exporter and exciter clocks: A method for synchronizing an exciter clock with a modem frame clock in a broadcasting system comprises the steps of receiving a plurality of modem frame pulses that are representative of the start of modem frames of audio signals and data signals, wherein timing of the modem frame pulses is...

20060209942 - Higher-phase noise measurement method using frequency prescaler, an apparatus and a program using the method: Signals under test are subjected to frequency division before being input to a phase detector by a method for measuring the phase noise of signals under test using an apparatus for measuring phase noise comprising a phase detector. Moreover, the level of the output of the phase detector is multiplied...

20060209943 - Method and apparatus for generating jitter test patterns on a high performance serial bus: The present invention provides a method for generating random jitter test patterns by generating a sequence of maximum-size asynchronous packets according to the P1394b standard and transmitting the sequence to the device under test. The present invention provides a method for generating jitter test patterns by disabling the transmitter data...

20060209944 - Altering power consumption in communication links based on measured noise: A method, circuit and system for altering the power consumption in communication links. A type of noise and an amount of jitter in a signal transmitted across a communication link is measured. Upon determining the contribution of the measured noise to the measured jitter in the signal, the measured noise...

20060209945 - Data receiver and equalizer adapter: A data receiver includes: a plurality of reception circuits each of which receives a data signal through a transmission line, and includes an equalizer having a function of performing waveform shaping of the data signal; and an equalizer adapter which is arranged in correspondence with all or every predetermined number...

20060209946 - Methods and devices for shortening the convergence time of blind, adaptive equalizers: The convergence time of a blind, adaptive equalizer is shortened by using a tracking generator. The tracking generator comprises a smoothing filter which receives and smoothes a tap coefficient error estimate derived from an output data stream. Thereafter, a fraction of the smoothed estimate is generated. It is the use...

20060209947 - Video compression: A method and apparatus is disclosed for creating a story-board of video frames from a stream of video data wherein only the video frames of the story-board are transmitted to the portable electronic devices. A content controlled summary is generated from input video data. The content control summary is then...

20060209952 - Image encoding/decoding method and apparatus therefor: An image encoding method includes generating a predictive signal and encoding mode information according to each encoding mode from a macroblock signal corresponding to each macroblock, selecting a quantization code table corresponding to each macroblock, generating a predictive error signal for each encoding mode based on the macroblock signal and...

20060209950 - Method and system for distributing video encoder processing: Described herein is a method and system for encoding video data. The design comprises two or more independent encoders that can process portions of a picture in parallel. Within each independent encoder, a higher degree of accuracy is given to edges that are adjacent to other portions. The decoded output...

20060209951 - Method and system for quantization in a video encoder: Described herein is a method and system for quantization in a video encoder. Human eyes have a different sensitivity to different frequency components of a picture. The eye may be less sensitive to variation of a higher spatial frequency and a corresponding portion of the picture would have a low...

20060209949 - Video signal encoding device and video signal encoding method: Included are: a prefilter (101) for outputting, based on filter characteristics control data, predetermined frequency components in an input video signal as current image data; encoding means (116) for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current...

20060209954 - Method and apparatus for providing a rate control for interlace coding: The present invention discloses a system and method for providing a rate control to an encoder, e.g., a H.264/MPEG-4 AVC compliant encoder. For example, the rate control method computes a target group of pictures (GOP) rate for a GOP of the input image sequence. The rate control method then computes...

20060209953 - Method of encoding for handheld apparatuses: The present invention relates to a method of encoding a sequence of pictures, a picture being divided into blocks of data, said encoding method comprising the steps of:—computing a residual error block from a difference between a current block contained in a current picture and a candidate area using of...

20060209956 - Motion estimation method utilizing modified rhombus pattern search for a succession of frames in digital coding system: A motion estimation method for a succession of frames in a digital coding system includes: a) with reference to a first block in a first frame, searching a second frame for a second block that corresponds to the first block; and b) estimating a motion vector of the first block...

20060209955 - Packet loss concealment for overlapped transform codecs: Real-time packet-based audio communications over packet-based networks frequently results in the loss of one or more packets during any given communication session. The real-time nature of such communications precludes retransmission of lost packets due to the unacceptable delays that would result. Consequently, packet loss concealment methods are employed to “hide”...

20060209958 - Method and/or apparatus for implementing global motion compensation in a video system: An apparatus comprising a video decoder, a video memory and a global motion circuit. The video decoder may be configured to generate a decoded video signal in response to a coded video signal. The video memory may be connected to the video decoder. The global motion circuit may be configured...

20060209959 - Methods and systems for extended spatial scalability with picture-level adaptation: Embodiments of the present invention comprise systems and methods for modification of motion vectors in spatial scalable video coding. Some embodiments of the present invention comprise methods and systems designed for use with the Scalable Video Coding extension of H.264/MPEG-4 AVC....

20060209957 - Motion sequence pattern detection: A motion sequence pattern detector (200,300) for detecting a periodic pattern of motion sequences within a succession of video fields (100,102) comprises a motion detection unit (202) for detecting presence of motion between pairs of fields of the succession of video fields (100,102) by means of computing differences between pixel...

20060209960 - Video encoder and decoder for achieving inter-and intra-frame predictions with reduced memory resource: A video encoder is composed of a DC/AC prediction unit performing DC/AC prediction, a motion vector prediction unit performing motion vector prediction, and a memory. The memory is accessible from both of the DC/AC prediction unit and the motion vector prediction unit....

20060209962 - Video encoding method and video encoder for improving performance: Video encoding methods and video encoders that provide improved performance while reducing power consumption. In one aspect, a video encoding method comprises the steps of outputting a parameter for a slice of a current frame, wherein the slice comprises a plurality of macroblocks, and the parameter comprises an address of...

20060209961 - Video encoding/decoding method and apparatus using motion prediction between temporal levels: A video encoding/decoding method and apparatus is disclosed that can efficiently compress/decompress motion vectors in a video codec including a hierarchical temporal level decomposition process. The video encoding method including a hierarchical temporal level decomposition process involves obtaining a predicted motion vector of a second frame, which exists at a...

20060209948 - Method for transcoding a data stream comprising one or more coded, digitised images: An input data stream coded using a first coding method and containing at least one coded digitized image is converted into an output data stream that is coded using a second coding method. The input data stream has first intra-blocks, each of which is coded in a first prediction mode...

20060209964 - Systems and methods for video compression for low bit rate and low latency video communications: The field of the invention relates to system and methods for video compression, and more particularly to systems and methods for video compression for low bit rate and low latency video communications. In one embodiment, a video communication system includes a first electronic device enabled to receive and display video...

20060209963 - Video encoding and decording methods and corresponding devices: The invention relates to the field of video compression and, more specifically, to a video encoding method applied to an input sequence of frames in which each frame is subdivided into blocks of arbitrary size. This method comprises, for at least a part of the blocks of the current frame,...

20060209965 - Method and system for fast run-level encoding: Methods and systems for processing video data utilizing fast RUN-LEVEL encoding are disclosed herein and may comprise detecting sequential video data within a leading portion of decoded video data entries. If the detected sequential video data comprises one or more zero video data entries, a RUN coefficient may be generated...

20060209966 - Method of time base reconstruction for discrete time labeled video: A method and an apparatus for converting multimedia data of a digital format to multimedia data of an analog format, such as NTSC or PAL is disclosed, multimedia synchronous digital multimedia interfaces may be supported in a similar manner. The digital format includes image data and timing data where the...

20060209967 - Method for the reconstruction of zero crossing information of noisy angle-modulated signals following limiter-discriminator signal processing: In a method for generating a reduced-noise signal sequence {{circumflex over (t)}i} from a noisy signal sequence {uj} comprising values uj which are characteristic of the temporal position of crossings of a noisy angle-modulated signal through a threshold value, a decision is made (102) as to whether a value {circumflex...

20060209968 - Method and device for injecting a differential current noise signal into a paired wire communication link: The present invention relates to a device and method for injecting a noise signal into a wire pair of a communication link. In operation a first current source and a second current source are disposed in series with a node therebetween coupled resistively to a wire of the wire pair....

20060209970 - Adaptive transmission rate communication system: A method is disclosed by which the data rate of the transmission on a communications link is adjusted according to the underlying channel conditions based on a fast Layer-1 feedback Channel Quality Indicator (CQI) control signal received on the return channel. The method enables the system to transmit a data...

20060209969 - Digital signal transmission system and method, transmission apparatus and method, and reception apparatus and method: The present invention relates to a digital signal transmission system and method, a transmission apparatus and method, and a reception apparatus and method that can reproduce an audio reference clock of a plurality of different frequencies from a video reference clock. A pixel clock is divided by a divider 51...

20060209971 - Interference-weighted communication signal processing systems and methods: A level of interference affecting signal components of received communication signals is estimated and used to weight the signal components. The signal components in a each of a number of groups of signal components are weighted based on respective interference estimates to thereby adjust signal components for coloured interference, which...

20060209975 - Multiple antenna communication system: A multiple antenna communication system is provided. In the multiple antenna communication system, a receiver selects a transmit eigenvector corresponding to a singular value resulting from the Singular Value Decomposition (SVD) of a channel matrix between Tx antennas and Rx antennas and feeds back the transmit eigenvector to a transmitter...

20060209973 - Pilot signal transmission for an orthogonal frequency division wireless communication system: Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and/or biasing from different mobile stations over the same frequencies and...

20060209974 - Propagation path estimating method and apparatus: A propagation path estimation method for a receiver of a radio communication system in which band limiting of a signal is performed in signal transmission and reception. The method comprises: estimating an impulse response group of a propagation path of the signal; having the impulse response group pass through a...

20060209972 - Techniques to detect radar in a communication signal: Techniques to detect radar signals in a communication signal for a wireless system are described....

20060209976 - Telecommunications transmission systems: In a multi-carrier system employing OFDM, for example DMT, an adaptive channel equalizer is normally used, operating in the frequency domain. The sampling clock is controlled so that the time delay between the transmitter and the receiver is effectively eliminated. If the information used to control the sampling clock is...

20060209977 - Global minimum-based mld demapping for soft-output mimo detection: A method for generating soft bit values for a multi-bit symbol encoded in one or more received signals comprises (a) for a plurality of different combinations of multiple bit values, iteratively generating, for each combination, a metric value based on the one or more received signals. The method further comprises...

20060209980 - Beam and power allocation method for mimo communication system: The present invention provides the multiuser Multiple-Input Multiple-Output (MIMO) systems with a feedback method which includes measuring, at the terminal, received Signal to Noise Ratios (SNRs) for all transmit antennas, selecting one of precoding matrixes, which has best SNRs, retrieving an index mapped to the selected preceding matrix from a...

20060209979 - Frequency offset tracking: The present invention relates to estimating and correcting for frequency offset errors in wireless receivers, and is particularly but not exclusively related to MIMO WLAN applications. The present invention provides an improved method of tracking receiver frequency offsets in a receiver for MIMO systems. These receiver based frequency offset components...

20060209978 - Indoor radio transmission method for parallel radio transmission of digital data substreams and a mobile radio transmission system: A radio transmission method and a wireless transmission system comprising multiple transmitter and receiver antennae simultaneously operating within the same frequency range and space-time encoders and decoders. Data transmission and channel matrix measurement can take place synchronously. Characteristic pilot signals that are unequivocally recognizable are superimposed with low noise on...

20060209982 - Coded digital modulation method for communication system: A new class of 16-ary Amplitude and Phase Shift Keying (APSK) coded modulations, called double-ring APSK modulation, based on an amplitude and phase shift keying constellation in which the locations of the digital signals to be encoded are placed on two concentric rings of equally spaced signal points. The APSK...

20060209981 - Systems and methods for high-efficiency transmission of information through narrowband channels: Systems and methods for transmitting information at very high data rates through narrowband communication channels are provided. The systems and methods involve modulating a message signal with a novel return-to-zero, abrupt phase modulation technique and filtering the modulated signal with a sophisticated high-precision digital filter. The digital filter is designed...

20060209983 - Distortion compensation apparatus: Provided is a distortion compensation apparatus to prevent divergence of distortion compensation coefficients caused by an abnormal distortion compensation coefficient value. The distortion compensation apparatus includes a storage for storing a distortion compensation coefficient in a specified write address, and outputting a distortion compensation coefficient stored in a specified readout...

20060209985 - Linearization apparatus and method of base station: A linearization apparatus includes a digital transceiver circuit which RF processes a signal from an external source, an amplifier which amplifies an output of the digital transceiver circuit, and a first digital pre-distortion circuit which pre-distorts an output of the amplifier based on an inverse FFT FIR filter estimation based...

20060209984 - Transmitter with an envelope tracking power amplifier utilizing digital predistortion of the signal envelope: A transmitter comprises an amplifier operable for receiving an input signal and amplifying the input signal to produce an output signal. A power supply is coupled to the amplifier for supplying power to the amplifier, the power supply operable for tracking the input signal and varying the level of power...

20060209986 - Multi-mode wireless polar transmitter architecture: A radio transmitter within a transceiver includes a digital processor and analog circuitry for modulating and transmitting an outgoing digital signal in multiple modes of operation. The digital processor digitally modulates the outgoing digital signal to produce one of a constant envelope modulated digital signal and a variable envelope modulated...

20060209987 - Receiver and its adjustment system and method: A receiver and its adjustment system and method that can reduce the effort and the cost required to give good characteristics. The receiver comprises a quadrature detector whose characteristics value is varied by adjusting the capacitance. The quadrature detector comprises a variable capacitance circuit 182 formed on a semiconductor substrate...

20060209988 - Demodulation circuit for use in receiver using if directing sampling scheme: Disclosed is a demodulation circuit for demodulating an IF signal which is input via an antennal and then over-sampled at a sampling rate four times a frequency of a baseband signal, the demodulation circuit including a mixer for converting the IF signal down to a baseband signal using a coefficient...

20060209989 - System and method for clock recovery in digital video communication: A system for clock recovery in digital video communication includes a delay measurement block for generating PCR input signals and for continuously determining the time interval between successive PCR input signals. The system also includes a first storage device for generating a first PCR signal corresponding to the time interval...

20060209990 - Communication semiconductor integrated circuit device incorporating a pll circuit therein: A communication semiconductor high-frequency IC device includes an offset-PLL transmission circuit. The device does not require an intermediate-frequency voltage controlled oscillator (IFVCO) to generate an intermediate-frequency (IF) signal and can modulate and demodulate transmission and reception signals of desired frequency bands without a complicated frequency division control circuit. An RF-PLL...

20060209991 - Tracking error detection and correction methods and apparatus: The objective of this invention is to perform high-precision tracking error detection and tracking control using digital circuitry at relatively low speed and with a small circuit scale. Tracking servo circuit is formed as a single-chip circuit. Low-pass filters (LPF) and gain control amplifiers (GCA) of the input portion are...

20060209992 - Receiver device: A frequency converter converts a high frequency signal transmitted in a frequency shift keying scheme into an intermediate frequency signal having a predetermined frequency, to output the intermediate frequency signal therefrom. An amplitude limiter limits an amplitude of an output signal from the frequency converter for output. An orthogonal demodulator...

20060209993 - Demodulator and receiver for pre-coded partial response signals: An improved demodulation mechanism (and corresponding methods of operation) that demodulates a differentially-encoded GMSK signal in a manner that is accurate and efficient and with reduced complexity. The demodulation mechanism includes at least one buffer for storing sequences of in-phase and quadrature-phase baseband samples that carry the GMSK signal therein....

20060209994 - Mld demapping using sub-metrics for soft-output mimo detection and the like: A method for detecting a symbol encoded in one or more received signals, wherein the detected symbol corresponds to a combination of values of n components, n>1, comprises (a) for each of a plurality of different combinations of values of the n components, generating a set of two or more...

20060209996 - Decoder for executing a viterbi algorithm: A Viterbi decoder includes a computing device that receives sets of data values and calculates distances from the received data values and accumulates and compares the distances according to a Viterbi algorithm and decides data values. Also included is a path memory for storing decided-upon data values. A bus connects...

20060209995 - Viterbi decoder: A Viterbi decoder capable of supporting a variety of constraint lengths and any arbitrary number of coefficients of a given estimated transmission path and composed of special hardware of small circuit scale. In the Viterbi decoder of the present invention, a branch metric calculation section (101) calculates the branch metrics...

20060209997 - Amplifiers with cutoff circuit to avoid overloading cellular network sites: A cellular network amplifier for reducing interference in a surrounding cellular network. The cellular network amplifier includes a communication device for receiving an uplink signal from a handset and a first variable gain module for applying an amplification factor to the uplink signal. The amplified uplink signal is transmitted to...

20060210000 - Communication system, communication unit and method of sharing a communication resource: A wireless communication system (200) comprises one or more communication networks supporting communications for a plurality of communication units on a shared communication resource. An identification function (144) identifies interference within, or non-availability of, a portion of the shared resource; and a communication adaptation function (142), responsive to a resource-responsible...

20060209999 - Interference detection in a wireless communication system: A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna (100) is fed through an analog part (200) and a subsequent digital part (300) of said receiver. The receiver comprising an element (240, 260)...

20060210001 - Method and system for mitigating interference in communication system: A method and system for mitigating interference in a communication system, comprising at least one base station and at least one terminal, are disclosed. The base stations and terminals communicate through a channel existing between them, and the channels include at least a first signal channel and a second signal...

20060209998 - Signal interference measurement: Described herein is a method for determining the amount of interference in a received signal that comprises a wanted signal and a plurality of interfering signals. The method comprises selecting a plurality of first known structures in the wanted signal, processing the received signal in accordance with said plurality of...

20060210003 - Selectively disabling interference cancellation based on channel dispersion estimation: This invention provides channel dispersion estimation algorithm(s). This channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a single-branch or multi-branch equalizer processing module that enables interference cancellation when the channel length or channel delay spread associated with received radio frequency (RF) bursts compares unfavorably...

20060210002 - Timing recovery in a parallel channel communication system: A parallel channel timing recovery circuit. The parallel timing recovery circuit comprises multiple prefilters receiving parallel channel outputs and providing prefilter outputs. Multiple sampling filters receive the prefilter outputs and provide multiple discrete time signal samples. A self-timing circuit has multiple inputs receiving the multiple discrete time signal samples. The...

20060210004 - Method and controller for syncronizing a wireless communication device and network: A communication controller and a method is provided for synchronizing a wireless communication device and a wireless communication network having two or more transmit antennas, which support transmit diversity. The communication controller and method generally provide for receiving a reference signal from the wireless communication network via each one of...

20060210005 - Method and apparatus for detecting linear phase error: Disclosed herein is a method and apparatus used to detect phase error information between edges of an input data signal and a clock signal for use at ultra-high frequencies and where linear phase error information is required. This invention extends the usefulness of a given integrated circuit logic technology to...

20060210006 - Phase generator for introducing phase shift in a signal: A phase generator includes a phase-shift enable and disable signal generator connected to configuration bits at its first input and connected to a reset signal at its reset input for generating a control signal; the configuration bits corresponding to the phase shift desired. The phase generator includes a logic signal...

20060203888 - Interface randomization methods and systems employing the same: Some representative embodiments are directed to systems and methods for randomizing data communicated across a digital interface. In some representative embodiments, a PN sequence is applied to a series of shift registers. An array of exclusive-or gates is provided to scramble each bit of the current data word using a...

20060203887 - Method of processing a sampled spread spectrum signal stream: In accordance with the present invention, a method of processing a sampled signal stream containing at least one spread spectrum signal is provided together with a receiver, computer, computer-readable storage medium and computer program for the same. The method comprises the steps of processing samples at a first bit level...

20060203890 - Radio lan system implementing simultaneous communication with different types of information and communication method for the same: A radio LAN (Local Area Network) system includes an access point and a mobile or a fixed station each having a physical layer implemented by a direct spread spectrum system. The LAN system uses different spread codes, maintains transmission power semi-fixed, and selects a frequency and a frequency band in...

20060203889 - Ultra-narrow bandwidth radio frequency communications link: The present invention is a dramatically enhanced RF link for low-data-rate applications (1-100 bps), using one or more transmitters to communicate with one or more receivers, at dramatically enhanced ranges. The receiver of the present invention can rapidly search, detect, and lock in on narrow band signal transmissions, that may...

20060203891 - Systems and methods for beamforming and rate control in a multi-input multi-output communication systems: Methods and apparatuses are disclosed that determine a type of channel information based upon whether a wireless device is scheduled to receive symbols. In addition, a determination may be as to a number of hop periods to determine the type of channel information. Further, a distance between hop regions may...

20060203892 - Spread spectrum communication unit: A communication unit comprises a command signal generator for generating a command signal. A transmitter transmits communication signals at one of two frequencies and for transmitting the command signal. A receiver receives communication signals at one of the two frequencies and for receiving the command signal. Upon initiation of the...

20060203893 - Components and methods for processing in wireless communication data in presence of format uncertainty: Components and method are provided to efficiently process wireless communications data where prior knowledge of a specific format of the communication data is not available. A wireless transmit receive unit (WTRU) is configured for use in a wireless communication system where communication data for selected channels is transmitted in system...

20060203894 - Method and device for impulse response measurement: The invention discloses a method, a receiver and a wireless terminal for measuring an impulse response e.g. in a (W)CDMA terminal having at least two receiving antenna branches with diversity reception. In the method one antenna branch is selected, e.g. by choosing the antenna with a good signal to interference...

20060203895 - Multiple channel joint decoding at mobile handset: A system and method suppresses the interference caused by non-orthogonal signals on multiple channels of the same receiver by applying an inverse of the correlation among the non-orthogonal signals to the decoded signals. In a multi-channel receiver, the receiver is aware of the codes that are allocated to each of...

20060203897 - Power-line carrier communication apparatus: The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing...

20060203896 - Semi-digital duplexing: The inventors have developed a DSL system that can employ digital duplexing for short loops while supporting communications over long loops. For short loops, the system aligns the data symbols at both ends and thereby performs two-way digital duplexing. For longer loops, the system performs semi-digital duplexing: the symbols are...

20060203898 - Transmit power adjustment based on estimated electrical length of a loop: A method for estimating electrical length of a loop in a digital subscriber line (DSL) system begins by estimating an electrical length of a loop for each of a plurality signals based on a known power level of the plurality of signals, a known frequency for each of the plurality...

20060203899 - Method of equalising a channel and apparatus therefor: In the field of optical communications, a number of techniques are known for channel equalisation. However, these techniques are, for various different technical and/or economic reasons, unsuitable for application in relation to optical communications at a data rate of 10 Gbps. Consequently, the present invention provides a dithered linear search...

20060203901 - Apparatus and method for correcting iq imbalance: An apparatus and method for correcting IQ imbalance are presented. An exemplary receiver for processing I and Q signals from a tuner includes: a non-decision directed (NDD) imbalance canceller coupled to receive the I and Q signals, and a decision directed (DD) imbalance canceller coupled to the non-decision directed imbalance...

20060203900 - Burst error limiting feedback equalizer system and method for multidimensional modulation systems: A burst error limiting symbol detector system includes a symbol detector circuit responsive to a corrected sample signal for detecting multilevel or multidimensional symbols encoded in the corrected sample signal with reference to a plurality of associated thresholds. A feedback equalizer circuit provides a feedback equalizer signal for cancelling undesired...

20060203902 - Method for detecting uwb pulse sequences in a cost-efficient manner: The present invention relates to a method for transmitting data in the form of at least one pulse sequence included in a transmitted signal Tsg. The method according to the invention includes at least one signal detection step in the course of which at least one detection value Pwv representative...

20060203903 - Surveillance system having auto-adjustment functionality: A surveillance system having auto-adjustment functionality is described. The surveillance system includes a motion detection module and a video processing module. The motion detection module detects real-time video data and determines whether the video data is in a motion status. When the real-time video data is in the motion status,...

20060203907 - Model based rate control for predictive video encoder: A rate control algorithm for a predictive video encoder is provided to accurately control the coding rate while requiring a small complexity. The algorithm assumes the video encoder to consist of two processors, pre-processor and main processor, and the rate control located in main processor uses prediction cost and residual...

20060203906 - Video coding method of exploiting the temporal redundancy between successive frames: The invention relates to a video coding method of exploiting the temporal redundancy between successive frames in a video sequence. A reference frame, called 1-frame, is first approximated by a collection of geometric features, called atoms. The following predicted frames called, P-frames, are approximated by the geometric transformations of the...

20060203904 - Video processing and recording apparatuses and methods: A method for video processing. A first video sequence (VS) is received. The first VS is processed to generate a second VS in a first resolution. The second VS is adjusted to a third VS in a second resolution. It is determined whether the difference between the first VS and...

20060203909 - Information processing apparatus and decoding method: According to one embodiment, there is provided an information processing apparatus including a decoding unit which decodes a moving image stream that is compressed and coded, a processing unit which performs a deblocking filtering process for a picture included in the moving image stream to reduce a block distortion, and...

20060203910 - Information processing apparatus and decoding method: According to one embodiment, there is provided an information processing apparatus, including a decoding unit which decodes a moving image stream that is compressed and coded, a deblocking filtering unit which performs a deblocking filtering process for a picture included in the moving image stream to reduce a block distortion,...

20060203908 - Method and apparatus for loading image data: A method for loading image data required by a motion estimation into a storage medium, the method includes: determining if an overlap portion between a current search range and a previous search range exists; and if the overlap portion exists; keeping image data corresponding to the overlap portion stored in...

20060203911 - Method for fast macroblock mode decision: A method for fast macroblock mode decision is disclosed. The method includes: (A) determining if a motion cost at the origin (0, 0) or a prediction motion vector (PMV) for a 4n*4n macroblock is smaller than a first threshold; (B) if the motion cost is smaller than the first threshold,...

20060203914 - Motion estimation method utilizing a distance-weighted search sequence: A motion estimation method for a succession of frames in a digital coding system includes: with reference to a first block in a first frame, searching a second frame for a second block that corresponds to the first block; and estimating a motion vector of the first block with respect...

20060203912 - Motion vector detection method, motion vector detection apparatus, computer program for executing motion vector detection process on computer: A motion vector detection method includes: a first obtaining unit that obtains similarities of images near a plurality of initial search points with an image of a partial region of a current frame; a setting unit that sets a plurality of subsequent search point candidates based on a gradient of...

20060203915 - Moving picture processor, method for processing a moving picture, and computer program product for executing an application for a moving picture processor: A moving picture processor including an evaluator configured to evaluate whether terminal points of motion vectors consecutively detected in a current picture and a reference picture different from the current picture in terms of time are in a determination area having a center at a terminal point of a reference...

20060203913 - Prediction image generating method and apparatus using single coding mode for all color components, and image and video encoding/decoding method and apparatus using the same: A prediction image generation method and apparatus using a single coding mode for all color components and image and video encoding and decoding methods and apparatuses using the same are provided. The prediction image generation apparatus includes: a spatial prediction image generation unit applying an identical prediction direction for each...

20060203905 - Video coding system: The present invention relates to a video coding system, which particularly presents a new addressing method that uses the bit allocation approach to simplify the computational circuit and significantly improves the memory access speed. Additionally, a pseudo address decoding concept is taken in a new memory structure for the bit...

20060203917 - Information processing apparatus with a decoder: According to one embodiment, an information processing apparatus having a decoder to decode encoded streaming data to be displayed to form a picture including a plurality of blocks comprises a filtering unit for filtering the decoded streaming data to reduce distortion of the block with respect to each picture, a...

20060203916 - Method, article of manufacture, and apparatus for high quality, fast intra coding usable for creating digital video content: A method for high quality, fast intra coding usable for creating digital video content. The video image is defined by data points representing original colors. Data points are selected based on a color characteristic, and are arranged into groups. At an initial stage (and at subsequent stages): selecting a subset...

20060203918 - Image processing apparatus implemented in ic chip: When a reverse reproduction is instructed, an MPEG video stream is once decoded and is converted to image video signals by a first display circuit. Thereafter, the image video signals are again recoded by an image input circuit and an MPEG video encoder, so as to be overwritten in a...

20060203919 - Method and apparatus for inserting digital media advertisements into statistical multiplexed streams: A method and system for the insertion of local signals, including digital media advertisements, into statistically multiplexed streams is presented. The rate control and timing information is computed and is used to specify the insertion time and rate parameters for digital advertisements. In one embodiment, a maximum bit rate over...

20060203920 - Method and device for splicing video data in compressed domain: The present invention provides a method, a module, and a device, which enable splicing of MPEG-4 simple profile compatible bitstreams in compressed domain into a seamless bitstream. The method of the present invention enables splicing on devices with constraints in processing power, storage and memory capacity and limited electrical supply....

20060203921 - Innovative combinational closed-loop and open-loop satellite user terminal power control system: Devices and methods are disclosed for reducing power control cushion of a user terminal configured to communicate with a satellite and a gateway station. The present invention provides a power control algorithm implemented in a user terminal that is designed to operate in a satellite communication system. The power control...

20060203922 - Spectral emission shaping sigma delta modulator for wireless applications: A novel sigma delta amplitude modulator having a noise transfer function adapted to shift quantization noise outside at least one frequency band of interest. In one embodiment, the sigma delta amplitude modulator includes a programmable order low pass stage. In a second embodiment, the sigma delta amplitude modulator incorporates comb...

20060203926 - Apparatus and method for detecting preambles according to ieee 802.11a wireless lan standard: A novel method and apparatus for short preamble detection within the framework of the 802.11a standard is described. The present invention can be easily implemented in both the radio part (preferred embodiment) and the baseband part (general case) of the receiver to provide short preamble detection. The inventive method and...

20060203923 - Method and communications system device for the code-modulated transmission of information: A method for the code-modulated transmission of information in a communications system via a carrier having at least two independent orthogonal resources, uses in particular a frequency band with a plurality of sub-resources as the first resource and the time as the second resource with a sequence of time slots...

20060203924 - Multi-carrier incremental redundancy for packet-based wireless communications: Methods and apparatus are disclosed herein for providing incremental redundancy in a wireless communication system to aid in error recovery. One or more redundancy versions are sent on different carriers than the primary version of information to be transmitted. At the receiver end the redundancy versions may be combined using...

20060203925 - Synchronization method for symbol boundary detection in uwb-ofdm: A method is presented for packet detection and symbol boundary location using a two-step sign correlation procedure. When the correlation crosses a threshold, a packet detection signal is generated to initiate processing of downstream blocks, and a symbol boundary location signal is generated for use in aligning data during processing....

20060203927 - 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...

20060203928 - Apparatus for decoding quasi-orthogonal space-time block codes: An efficient decoding scheme of a receiver in a wireless communication system including a transmitter for encoding data into quasi-orthogonal space-time block codes (STBCs) and transmitting the STBCs through a plurality of transmit antennas using fading channels, and a receiver for receiving data through a plurality of receive antennas. In...

20060203929 - Apparatus and method of detecting a sync signal and a vsb receiver using the same: A sync signal detecting apparatus, a method thereof, and a Vestigial Side Band receiver employing the apparatus. The apparatus includes a correlator to compute one or more correlation values of the received signal, a starting point determiner to detect a location of a received signal having a maximum correlation value...

20060203934 - Apparatus and method for transmission/reception: In a modulation method such as 8 PSK or a 16 PSK in which a sender device expresses a symbol by using three or more bits, important information is arranged at least at only one of the first and second bits, a receiver device extracts the important information from at...

20060203933 - Data processing method, network element, transmitter, component and computer program product: A transmitter includes means for searching for and storing a maximum limit for a combined coding rate. The transmitter also includes means for selecting a first coding rate for a first transmission. The transmitter also includes means for selecting a new coding rate for a following transmission on the basis...

20060203931 - M-ary modulation of signals for coherent and differentially coherent receivers: A system incorporates TH-IR, TR-IR and noncoherent transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by selecting one coding sequence from a set of orthogonal or quasi-orthogonal coding sequences based on a current subsequence of bits of the input sequence,...

20060203930 - Operational state transition and event logging system for an rf transmitter: The operational state transitions and events of an RF transmitter having a plurality of operational states are monitored and recorded. A plurality of ports are provided that each receive an indication of an occurrence of an event that can cause a transition from one state to another of the plurality...

20060203932 - Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing: A transmitter generates a pilot having a constant time-domain envelope and a flat frequency spectrum based on a polyphase sequence. To generate a pilot IFDMA symbol, a first sequence of pilot symbols is formed based on the polyphase sequence and replicated multiple times to obtain a second sequence of pilot...

20060203935 - Broadband multicarrier transmitter with subchannel frequency diversity for transmitting a plurality of spatial streams: A multicarrier transmitter assigns for each of a plurality of spatial channels, sets of the constellation symbols to subcarriers of each subchannel. Constellation symbol assignments to the subchannels are circularly rotated among some of the spatial channels so that subchannels use different sets of subcarriers for each spatial channel for...

20060203937 - Fully digital frequency locked loop/phase locked loop method and system having a short locking time: Embodiments of the present invention relate to a system for clock synthesis or data timing recovery. No analog continuous time oscillator is required, all the building blocks of a Frequency Locked Loop/Phase Locked Loop belonging in the digital discrete time domain. From a system-level perspective, the system is characterized by...

20060203938 - Method and system for generating reference voltages for signal receivers: A method and system for generating a reference voltage for memory device signal receivers operates in either a calibration mode or a normal operating mode. In the calibration mode, the magnitude of the reference voltage is incrementally varied, and a digital signal pattern is coupled to the receiver at each...

20060203936 - Pulse detection in wireless communications system: Pulses are detected in a communications receiver by programming each of a plurality of comparators (44a, 44b, . . . , 44n) with a sampling time point selected from a plurality of sampling time points (58, 60) and with a reference level selected from a plurality of reference levels (54,...

20060203939 - Method and apparatus for correcting duty cycle distortion: In one embodiment, DC offset is removed from an input signal to correct duty cycle distortion in a communications system receiver. The DC offset in the input signal may be determined by recovering clock and data signals from the logical signal, and then generating a correction voltage that may be...

20060203940 - Asynchronous zcd demodulator/decoder: There is provided a detector for extracting binary data frequency-modulated on a carrier signal. An axes generator produces M pairs of logic signals, the logic signals of the same pair being in quadrature. The decoder includes M asynchronous logic zero-crossing detectors producing first pulses and second pulses. An up-counter/down-counter has...

20060203941 - Method and apparatus to establish for imperfect channel state information at a receiver: The system and method utilize design criteria and construction for signal constellations in communication systems, such as cellular telephony, that have imperfect channel state information at the receiver. The system and method assume an imperfect knowledge of fading channel state information (600B) and statistics of channel fading (600D) are used...

20060203942 - Method and article of estimating of phase and gain mismatch and corresponding method and device for receiving a digital base band signal: The method is for estimating a phase and gain mismatch of a base band digital signal. It comprises: determining (10) weight coefficients depending upon the likelihood of the frequency values of a segment of said base band digital signal; and determining (26) the phase and gain mismatch for the segment...

20060203943 - Single antenna interference suppression in a wireless receiver: A novel and useful apparatus for and method of single antenna interference cancellation (SAIC) in a wireless communications system. A class of algorithms for Downlink Advanced Receiver Performance (DARP) receivers based on a novel metric calculation used during equalization and optionally in other portions of the receiver as well such...

20060203944 - Apparatus to detect a sync signal, a vsb receiver using the same, and a method thereof: An apparatus to detect a sync signal, a VSB receiver using the same, and a method thereof. The apparatus includes a plurality of partial correlators to calculate a first partial correlation value between a sub sequence of a training sequence and an “I” signal of a received signal that corresponds...

20060203945 - Method and apparatus for antenna diversity: A receiver includes a plurality of antennas; a switching device coupled to the antennas for selecting one of the antennas to receive transmitted signals; a demodulator coupled to the switching device for demodulating the transmitted signals to generate demodulated signals; and a control circuit coupled to the demodulator and the...

20060203946 - Channelized receiver system with architecture for signal detection and discrimination: A channelized receiver with improved signal detection and discrimination. Separate threshold values are computed for each channel in the receiver. The values are computed dynamically in response to detected signal levels. In channels where energy is likely the result of spectral “splatter” from other channels, the threshold is set relatively...

20060203947 - Method and apparatus for detecting linear phase error: Disclosed herein is a method and apparatus used to detect phase error information between edges of an input data signal and a clock signal for use at ultra-high frequencies and where linear phase error information is required. This invention extends the usefulness of a given integrated circuit logic technology to...

20060203948 - Phase detector and method providing rapid locking of delay-lock loops: A delay-lock loop includes a dual mode phase detector. The dual mode phase detector includes a single edge phase detector that generates output signals indicative of the phase relationship between the rising edge of a reference signal and the rising edge of a feedback signal generated by the delay-lock loop....

20060203950 - Dual-loop automatic frequency control for wireless communication: Techniques for performing frequency control using dual-loop automatic frequency control (AFC) are described. The dual-loop AFC includes an inner loop that corrects short-term frequency variations (e.g., due to Doppler effect) and an outer loop that corrects long-term frequency variations (e.g., due to component tolerances and temperature variations). In one design,...

20060203949 - Optical disk apparatus and pll circuit: With the objective of providing a stable PLL circuit and improving readout performance of an optical disk apparatus equipped with PRML, using the PLL circuit, phase detectors are respectively provided with respect to signals prior and subsequent to an FIR filter, and the phase detectors are selectively used according to...

20060198425 - Method for transmitting uwb pulse sequences in a cost-efficient manner: The present invention relates to a method for transmitting data in the form of at least one modulated reference pulse sequence included in a transmitted signal Tsg. The method according to the invention includes at least one signal transmission step in the course of which the number of pulses included...

20060198426 - Overhead reduction in frequency hopping system for intermittent transmission: A radio transmission telemetry system includes several transmitters intermittently transmitting short messages indicative associated sensors status and a receiver for collecting data from the sensors. The transmitters transmit short messages separated by long time intervals independently of any receiver capable of receiving from any of the transmitters. Each transmitter changes...

20060198427 - System and method for fast code phase and carrier frequency acquisition in gps receiver: A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted...

20060198428 - Spread spectrum transmission systems: A code phase signalling module arranged to provide code phase signalling to assist in signal acquisition of direct sequence spread spectrum signalling received by a receiver module from a transmitter module, wherein the code phase signalling is arranged to be used by the receiver module to synchronise the phase of...

20060198429 - Isolating circuit of transmitting and receiving paths in same frequency carrier: An isolating circuit of transmitting and receiving paths in the same frequency carrier comprises a directional coupler, a phase adjuster, and a mixer. The directional coupler couples a transmitting signal on the transmitting path to the phase adjuster. There is a 90-degree phase difference between an output signal of the...

20060198430 - Dsl state and line profile control: Transitions between states and/or profiles for a line in a communication system, such as a DSL system, are controlled by evaluating the current state of the line and one or more target states. Evaluation of the feasibility of staying in the current state or moving to one of the target...

20060198431 - Activity monitor for multiple rf channels: An activity monitor for a multiple channel RF signal acquires time domain data from the RF signal over a wide bandwidth that includes multiple channels. The acquired data is separated by individual channel filters to provide channel data for each channel. The channel data is measured to produce measurement results...

20060198433 - Colored noise detection algorithms: This invention provides colored noise detection algorithm(s). This colored noise detection algorithm(s) may be implemented with a multi-branch equalizer processing module that enables interference cancellation when colored noise is associated with received radio frequency (RF) bursts. The noise discriminator identifies when the radio frequency (RF) bursts have white noise or...

20060198432 - Single antenna interference cancellation within a wireless terminal: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon...

20060198435 - Digital filter: To provide a digital filter that is small in its circuit scale and can suppress a consumed electric power to a low level. A multiplier 1, a first adder 2 and a second adder 3 perform a filtering calculation to data inputted to a digital filter 10. A first output...

20060198434 - Equalizer training method using re-encoded bits and known training sequences: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon...

20060198436 - Bandwidth reduction by one half: A method for transmitting information on electromagnetic waves that requires less bandwidth than other common modes. The information is divided into two parts in the manner of the Weaver method of single sideband generation. These two parts each have one-half the bandwidth of the original information. The two parts are...

20060198437 - Method and apparatus for converting photo slides into motion pictures in a mobile terminal: A method and apparatus for converting a photo slide into a motion picture in a mobile terminal by which the photo slide including a plurality of photos is converted into the motion picture for MMS (Multimedia Message Service) message transmissions, thereby being able to be transmitted at a time, the...

20060198438 - Scene description generating apparatus and method, scene description converting apparatus and method, scene description storing apparatus and method, scene description decoding apparatus and method, user interface system, recording medium, and transmissio: A user interface system includes a server which includes a scene description converter for converting an input scene description into scene description data having a hierarchical structure, based on an identifier that indicates a division unit for dividing the input scene description, in accordance with hierarchical information. A scene description...

20060198439 - Method and system for mode decision in a video encoder: Described herein is a method and system for encoding video data. Mode decision during video encoding is based on optimization of rate and distortion. This optimization is efficiently accomplished by using a look-up table of rate-distortion parameters necessary for cost generation. The relationship between rate and distortion may change over...

20060198440 - Method and apparatus for weighted prediction estimation using a displaced frame differential: A video encoder and corresponding methods are provided for weighted prediction estimation using a displaced frame difference or differential, the encoder embodying a method for receiving a substantially uncompressed image block, assigning a weighting factor for the image block corresponding to a particular reference picture having a corresponding index, computing...

20060198443 - Adaptive frame skipping techniques for rate controlled video encoding: The disclosure is directed to adaptive frame skipping techniques for rate controlled video encoding of a video sequence. According to the disclosed techniques, an encoder performs frame skipping in an intelligent manner that can improve video quality of the encoded sequence relative to encoding using conventional frame skipping. In particular,...

20060198442 - Method, apparatus and system for frame level recovery using a collection of badly received frames: In some embodiments, a method, apparatus and system for frame level recovery using a collection of badly received frames are presented. In this regard, an estimation agent is introduced to store contents from a plurality of badly received frames, and to use the contents to generate an estimate frame for...

20060198441 - Motion detection method for detecting motion objects in video frames generated from a video surveillance system: A motion detection method for detecting motion objects in video frames generated from a video surveillance system. The motion detection method includes the steps of (1) calculating and accumulating a number of a current macro block row by row, the current macro block having a motion vector, which has a...

20060198444 - Moving picture processor, method for processing a moving picture, and computer program product for executing an application for a moving picture processor: A moving picture processor includes a first detector configured to detect a reference block most similar to a target block for which motion is to be detected and which is set in a current picture, and to generate a first motion vector candidate indicating a relative position between the target...

20060198445 - Prediction-based directional fractional pixel motion estimation for video coding: Motion-compensated video coding that employs prediction-based directional fractional pixel motion estimation is described. The fractional pixel motion estimation uses prediction-based searching and directional searching to search for candidate sub-pixel motion vectors oriented in a certain direction. With prediction-based searching, sub-pixel motion vectors are predicted using two techniques—median prediction and up-layer...

20060198446 - Generalized reference decoder for image or video processing: A method and system including an improved generalized reference decoder that operates according to any number of sets of rate and buffer parameters for a given bit stream. Each set characterizes a leaky bucket model and contains three parameters representing the transmission bit rate, buffer size, and initial decoder buffer...

20060198447 - Method and apparatus for synchronized recording of audio and video streams: A method for synchronized recording of audio and video signals is disclosed. The video signals are grouped into a plurality of video frames. The method includes incrementing a counter value of an audio counter when at least an audio frame associated with the audio signals is encoded, and recording the...

20060198448 - Techniques to manage wireless connections: A system, apparatus, method and article to manage wireless connections are described. The apparatus may include a connection management module to automatically form a first connection between a first mobile device and a second mobile device, and a second connection between the second mobile device and a fixed device, wherein...

20060198454 - Adaptive channel estimation thresholds in a layered modulation system: Dynamic channel estimation thresholds allow for determining optimal threshold values for channel estimation in a layered-modulation wireless communication system. A channel estimation threshold can be used to remove or otherwise filter out channel estimate components that may be significantly influenced by noise. The channel estimation threshold value can be used...

20060198451 - Distance division multiplexing: A general method for extracting an electromagnetic or other wave-propagated signal of a desired source from the overall received waveform containing the sum of signals from a multitude of such sources, independently of signal contents and modulation. The method comprises the steps of first expanding the spectrum of the received...

20060198453 - Impluse supression apparatus applied in ofdm system and related method thereof: An impulse suppression apparatus and method applied in an OFDM system for suppressing the impulse noise of a first time-domain signal are disclosed. The impulse suppression apparatus includes a noise blanker for generating a second time-domain signal through blanking the noise of the first time-domain signal, wherein each absolute value...

20060198452 - Method to minimize degradation in a d-mpsk hierarchical modulation system: The present invention provides a method to minimize degradation in a D-MPSK hierarchical modulation system by adding additional data throughput (i.e., secondary information) as an offset to the primary signal transmitted by a SDARS terrestrial repeater. The present invention provides techniques for adding the additional throughput as Level 2 data...

20060198450 - Radio transmitter apparatus and modulation scheme selecting method: A wireless transmission apparatus that can accurately select an optimal modulation scheme on a per block basis in a multi-carrier communication system in which block division of subcarriers and adaptive modulation are performed. In this wireless transmission apparatus, a propagation path characteristics acquisition section (107) acquires the average SNR and...

20060198449 - Receiver for a multi-carrier communication system: A receiver for a multi-carrier communication system receives training pilot carriers (TRPC) during a training symbol (T1, T2) which precedes data symbols (DS) which have data carriers (DC) and data pilot carriers (PC). The receiver has a correction unit (171) which supplies, under control of a control signal (CEC), a...

20060198455 - Transmitter and transmission control method used in random access communication environment: A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement determination unit configured to determine placement of pilot symbols based on the detected status of frequency utilization, and a symbol placement unit configured...

20060198456 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198457 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198458 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198460 - Link adaptation for high throughput multiple antenna wlan systems: A wireless device 148 that performs link adaptation is disclosed. The wireless device 148 comprises at least two antennas 101a, 120a and 101b, 120b, and a network interface logic operable to select transmission parameters based on a packet error rate 154 and on at least one signal to noise ratio...

20060198462 - Method for encoding a message using diagonally weighted space-time trellis code depending on bit feedback: Disclosed is a method for encoding messages with space-time trellis codes(STTC) and transmitting the encoded messages in communication system provided with at least two transmit antennas and at least one receive antenna. The method comprising generating a codeword by encoding message using STTC; generating a modified codeword by multiplying the...

20060198459 - Nonlinear precoding method for a digital broadcast channel: Several subscriber signals are transmitted simultaneously and at the same frequency by a central transmitter to several decentralized receivers which do not cooperate with each other, by digital message transmission in a broadcast channel. A common transmission signal, which enables an error-free individual reception, should be generated with knowledge of...

20060198461 - Wireless data communication system and wireless data communication method: In MIMO transmission which executes quadrature modulation of M transmission antennas and N reception antennas, a transmission signal vector will be set as a vector having the element number of 2M that comprises the in-phase components and quadrature components of M complex signals, a reception signal vector will be set...

20060198463 - Device for converting a transmitted signal into a digital signal: A device for converting a signal (VRZ) transmitted over a communications channel into a digital signal. The transmitted signal corresponds to encoded digital data with n states, n being at least equal to two. The converter comprises means for asynchronously comparing (21) at least one parameter of the transmitted signal...

20060198464 - Distortion compensation apparatus: Provided is a distortion compensation apparatus which can correspond to the number of carriers adaptively. The apparatus includes a distortion compensation processing circuit multiplying an input signal by a distortion compensation coefficient; a distortion compensation coefficient storage storing the distortion compensation coefficient correspondingly to the input signal power; a distortion...

20060198465 - Systems and methods for the dynamic range compression of multi-bearer single-carrier and multi-carrier waveforms: The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of the waveform without expanding the spectral bandwidth of the allocated channels. Embodiments...

20060198466 - Systems and methods for the reduction of peak to average signal levels of multi-bearer single-carrier and multi-carrier waveforms: The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of the waveform without expanding the spectral bandwidth of the allocated channels. Embodiments...

20060198467 - Semi-synchronous receiver and apparatus for reading information: A receiver is described for delivering a data sequence (ak) at a data rate 1/T from an analog signal (Sa), the receiver comprising: a) converting means (40) for generating a received sequence (rn) by sampling the analog signal (Sa) with a sample rate of 1/Ts, whereby the sample rate 1/Ts...

20060198468 - Single and multiple sinewave modulation and demodulation techniques employing carrier-zero and carrier-peak data-word start and stop: A method for detecting encoded digital data from a substantially sinusoidal waveform, the encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of...

20060198469 - Asymmetry compensator for partial response maximum likelihood (prml) decoder: An asymmetry compensator for a partial response maximum likelihood (PRML) decoder, which is utilized to remove and eliminate the asymmetric component of the regenerating signal read from the optical recording medium, thereby effectively solving the problem of the asymmetry of the optical disk regenerating signal. The compensator includes an offset...

20060198470 - Searching method for maximum-likelihood (ml) detection: The present invention relates to a method for searching a solution point of maximum-likelihood detection. The solution point locates at a symbol constellation. The method includes the following steps: determining a central point and a norm by a zero-forcing detection method; determining a searching range according to the central point...

20060198473 - Apparatus and method for detecting preambles according to ieee 802.11b wireless lan standard: The present invention relates to the field of wireless communication systems and in particular to an apparatus and a method for short preamble detection within the framework of the 802.11b standard. The present invention can be easily implemented in either the radio part (preferred embodiment) or the baseband part (general...

20060198471 - Matched filtering: A signal is filtered by multiplying its Fourier transform by the Fourier transform of a reference sequence to which the filtering is to be matched. The reference sequence (e.g. a Golay sequence pair) is defined as an iterative combination of shorter sequences and its Fourier transform is generated by an...

20060198474 - Method and system for down-converting and electromagnetic signal, and transforms for same: Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be...

20060198472 - Transmission system, transmitter device, and receiver device: A transmission system which is simple in construction and yet can effectively avoid inter-symbol interference. A transmitter device transmits a signal block while repeating the same signal block twice consecutively. A receiver device receives the signal blocks, performs Fourier transform operation on the two identical signal blocks at respective predetermined...

20060198475 - Apparatus and method for compensating iq imbalance in ofdm system with carrier frequency offset: An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase analog signals; an in-phase and quadrature-phase imbalance parameter estimation unit coupled to the mixer module for estimating a gain...

20060198477 - Carrier detection for multiple receiver systems: The present invention provides a method for carrier detection associated with the receipt of MIMO RF packet communications. This involves receiving multiple MIMO RF packet communications with multiple receiver pathways, wherein the RF packet communications each comprise a preamble and data. The RF packet communications are sampled by a carrier...

20060198476 - Multiple-input multiple-output multichip transceiver with correlated clokc signals: A multichip transceiver operates as part of a multiple-input multiple-output communication system. First receiver circuitry on a first integrated circuit processes radio-frequency (RF) signals received from a first signal source, and second receiver circuitry on a second integrated circuit processes RF signals received from a second signal source. Clock-signal generating...

20060198478 - Method and apparatus for determining an output sequence from an input sequence: A method and a device for determining an output sequence of output elements from an input sequence of input elements is provided, the method or the device being implemented according to a decision feedback equalizer. The adaptation of coefficients of the equalizer is performed on the basis of an estimated...

20060198479 - Data synchronizer system: A data synchronizer system includes at least two synchronizers for receiving a source pulse signal, a corresponding source clock, and a destination clock. At least two first memory units each have a destination clock input. A first switch has an input coupled to the source pulse signal and an output...

20060198481 - Apparatus and method for tracking a sampling clock of multi-carrier communication system: An apparatus and a method for tracking a sampling clock of a multi-carrier communication system are disclosed, the apparatus including a data removal module, a phase estimation module, and a sampling clock offset computation module. The data removal module is for generating a plurality of first and second data removal...

20060198480 - Method, article, and apparatus for a dynamic phase delay compensator: An apparatus, method, and article to dynamically adjust a data signal using a regenerated clock signal in an emulator to increase communication speed between the emulator and the evaluation board is disclosed. In one embodiment, this is achieved by applying a reference clock signal at a predetermined frequency to a...

20060198482 - Method and apparatus for maintaining a clock/data recovery circuit frequency during transmitter low power mode: A method, algorithm, software, architecture, circuit, and/or system for detecting an idle condition and maintaining a frequency of a clock/data recovery circuit are disclosed. In one embodiment, a method of maintaining a frequency of a clock/data recovery circuit can include the steps of: (i) comparing a difference value from a...

20060198425 - Method for transmitting uwb pulse sequences in a cost-efficient manner: The present invention relates to a method for transmitting data in the form of at least one modulated reference pulse sequence included in a transmitted signal Tsg. The method according to the invention includes at least one signal transmission step in the course of which the number of pulses included...

20060198426 - Overhead reduction in frequency hopping system for intermittent transmission: A radio transmission telemetry system includes several transmitters intermittently transmitting short messages indicative associated sensors status and a receiver for collecting data from the sensors. The transmitters transmit short messages separated by long time intervals independently of any receiver capable of receiving from any of the transmitters. Each transmitter changes...

20060198427 - System and method for fast code phase and carrier frequency acquisition in gps receiver: A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted...

20060198428 - Spread spectrum transmission systems: A code phase signalling module arranged to provide code phase signalling to assist in signal acquisition of direct sequence spread spectrum signalling received by a receiver module from a transmitter module, wherein the code phase signalling is arranged to be used by the receiver module to synchronise the phase of...

20060198429 - Isolating circuit of transmitting and receiving paths in same frequency carrier: An isolating circuit of transmitting and receiving paths in the same frequency carrier comprises a directional coupler, a phase adjuster, and a mixer. The directional coupler couples a transmitting signal on the transmitting path to the phase adjuster. There is a 90-degree phase difference between an output signal of the...

20060198430 - Dsl state and line profile control: Transitions between states and/or profiles for a line in a communication system, such as a DSL system, are controlled by evaluating the current state of the line and one or more target states. Evaluation of the feasibility of staying in the current state or moving to one of the target...

20060198431 - Activity monitor for multiple rf channels: An activity monitor for a multiple channel RF signal acquires time domain data from the RF signal over a wide bandwidth that includes multiple channels. The acquired data is separated by individual channel filters to provide channel data for each channel. The channel data is measured to produce measurement results...

20060198433 - Colored noise detection algorithms: This invention provides colored noise detection algorithm(s). This colored noise detection algorithm(s) may be implemented with a multi-branch equalizer processing module that enables interference cancellation when colored noise is associated with received radio frequency (RF) bursts. The noise discriminator identifies when the radio frequency (RF) bursts have white noise or...

20060198432 - Single antenna interference cancellation within a wireless terminal: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon...

20060198435 - Digital filter: To provide a digital filter that is small in its circuit scale and can suppress a consumed electric power to a low level. A multiplier 1, a first adder 2 and a second adder 3 perform a filtering calculation to data inputted to a digital filter 10. A first output...

20060198434 - Equalizer training method using re-encoded bits and known training sequences: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon...

20060198436 - Bandwidth reduction by one half: A method for transmitting information on electromagnetic waves that requires less bandwidth than other common modes. The information is divided into two parts in the manner of the Weaver method of single sideband generation. These two parts each have one-half the bandwidth of the original information. The two parts are...

20060198437 - Method and apparatus for converting photo slides into motion pictures in a mobile terminal: A method and apparatus for converting a photo slide into a motion picture in a mobile terminal by which the photo slide including a plurality of photos is converted into the motion picture for MMS (Multimedia Message Service) message transmissions, thereby being able to be transmitted at a time, the...

20060198438 - Scene description generating apparatus and method, scene description converting apparatus and method, scene description storing apparatus and method, scene description decoding apparatus and method, user interface system, recording medium, and transmissio: A user interface system includes a server which includes a scene description converter for converting an input scene description into scene description data having a hierarchical structure, based on an identifier that indicates a division unit for dividing the input scene description, in accordance with hierarchical information. A scene description...

20060198439 - Method and system for mode decision in a video encoder: Described herein is a method and system for encoding video data. Mode decision during video encoding is based on optimization of rate and distortion. This optimization is efficiently accomplished by using a look-up table of rate-distortion parameters necessary for cost generation. The relationship between rate and distortion may change over...

20060198440 - Method and apparatus for weighted prediction estimation using a displaced frame differential: A video encoder and corresponding methods are provided for weighted prediction estimation using a displaced frame difference or differential, the encoder embodying a method for receiving a substantially uncompressed image block, assigning a weighting factor for the image block corresponding to a particular reference picture having a corresponding index, computing...

20060198443 - Adaptive frame skipping techniques for rate controlled video encoding: The disclosure is directed to adaptive frame skipping techniques for rate controlled video encoding of a video sequence. According to the disclosed techniques, an encoder performs frame skipping in an intelligent manner that can improve video quality of the encoded sequence relative to encoding using conventional frame skipping. In particular,...

20060198442 - Method, apparatus and system for frame level recovery using a collection of badly received frames: In some embodiments, a method, apparatus and system for frame level recovery using a collection of badly received frames are presented. In this regard, an estimation agent is introduced to store contents from a plurality of badly received frames, and to use the contents to generate an estimate frame for...

20060198441 - Motion detection method for detecting motion objects in video frames generated from a video surveillance system: A motion detection method for detecting motion objects in video frames generated from a video surveillance system. The motion detection method includes the steps of (1) calculating and accumulating a number of a current macro block row by row, the current macro block having a motion vector, which has a...

20060198444 - Moving picture processor, method for processing a moving picture, and computer program product for executing an application for a moving picture processor: A moving picture processor includes a first detector configured to detect a reference block most similar to a target block for which motion is to be detected and which is set in a current picture, and to generate a first motion vector candidate indicating a relative position between the target...

20060198445 - Prediction-based directional fractional pixel motion estimation for video coding: Motion-compensated video coding that employs prediction-based directional fractional pixel motion estimation is described. The fractional pixel motion estimation uses prediction-based searching and directional searching to search for candidate sub-pixel motion vectors oriented in a certain direction. With prediction-based searching, sub-pixel motion vectors are predicted using two techniques—median prediction and up-layer...

20060198446 - Generalized reference decoder for image or video processing: A method and system including an improved generalized reference decoder that operates according to any number of sets of rate and buffer parameters for a given bit stream. Each set characterizes a leaky bucket model and contains three parameters representing the transmission bit rate, buffer size, and initial decoder buffer...

20060198447 - Method and apparatus for synchronized recording of audio and video streams: A method for synchronized recording of audio and video signals is disclosed. The video signals are grouped into a plurality of video frames. The method includes incrementing a counter value of an audio counter when at least an audio frame associated with the audio signals is encoded, and recording the...

20060198448 - Techniques to manage wireless connections: A system, apparatus, method and article to manage wireless connections are described. The apparatus may include a connection management module to automatically form a first connection between a first mobile device and a second mobile device, and a second connection between the second mobile device and a fixed device, wherein...

20060198454 - Adaptive channel estimation thresholds in a layered modulation system: Dynamic channel estimation thresholds allow for determining optimal threshold values for channel estimation in a layered-modulation wireless communication system. A channel estimation threshold can be used to remove or otherwise filter out channel estimate components that may be significantly influenced by noise. The channel estimation threshold value can be used...

20060198451 - Distance division multiplexing: A general method for extracting an electromagnetic or other wave-propagated signal of a desired source from the overall received waveform containing the sum of signals from a multitude of such sources, independently of signal contents and modulation. The method comprises the steps of first expanding the spectrum of the received...

20060198453 - Impluse supression apparatus applied in ofdm system and related method thereof: An impulse suppression apparatus and method applied in an OFDM system for suppressing the impulse noise of a first time-domain signal are disclosed. The impulse suppression apparatus includes a noise blanker for generating a second time-domain signal through blanking the noise of the first time-domain signal, wherein each absolute value...

20060198452 - Method to minimize degradation in a d-mpsk hierarchical modulation system: The present invention provides a method to minimize degradation in a D-MPSK hierarchical modulation system by adding additional data throughput (i.e., secondary information) as an offset to the primary signal transmitted by a SDARS terrestrial repeater. The present invention provides techniques for adding the additional throughput as Level 2 data...

20060198450 - Radio transmitter apparatus and modulation scheme selecting method: A wireless transmission apparatus that can accurately select an optimal modulation scheme on a per block basis in a multi-carrier communication system in which block division of subcarriers and adaptive modulation are performed. In this wireless transmission apparatus, a propagation path characteristics acquisition section (107) acquires the average SNR and...

20060198449 - Receiver for a multi-carrier communication system: A receiver for a multi-carrier communication system receives training pilot carriers (TRPC) during a training symbol (T1, T2) which precedes data symbols (DS) which have data carriers (DC) and data pilot carriers (PC). The receiver has a correction unit (171) which supplies, under control of a control signal (CEC), a...

20060198455 - Transmitter and transmission control method used in random access communication environment: A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement determination unit configured to determine placement of pilot symbols based on the detected status of frequency utilization, and a symbol placement unit configured...

20060198456 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198457 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198458 - Methods and apparatus for self-inverting turbo code interleaving with high separation and dispersion: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention...

20060198460 - Link adaptation for high throughput multiple antenna wlan systems: A wireless device 148 that performs link adaptation is disclosed. The wireless device 148 comprises at least two antennas 101a, 120a and 101b, 120b, and a network interface logic operable to select transmission parameters based on a packet error rate 154 and on at least one signal to noise ratio...

20060198462 - Method for encoding a message using diagonally weighted space-time trellis code depending on bit feedback: Disclosed is a method for encoding messages with space-time trellis codes(STTC) and transmitting the encoded messages in communication system provided with at least two transmit antennas and at least one receive antenna. The method comprising generating a codeword by encoding message using STTC; generating a modified codeword by multiplying the...

20060198459 - Nonlinear precoding method for a digital broadcast channel: Several subscriber signals are transmitted simultaneously and at the same frequency by a central transmitter to several decentralized receivers which do not cooperate with each other, by digital message transmission in a broadcast channel. A common transmission signal, which enables an error-free individual reception, should be generated with knowledge of...

20060198461 - Wireless data communication system and wireless data communication method: In MIMO transmission which executes quadrature modulation of M transmission antennas and N reception antennas, a transmission signal vector will be set as a vector having the element number of 2M that comprises the in-phase components and quadrature components of M complex signals, a reception signal vector will be set...

20060198463 - Device for converting a transmitted signal into a digital signal: A device for converting a signal (VRZ) transmitted over a communications channel into a digital signal. The transmitted signal corresponds to encoded digital data with n states, n being at least equal to two. The converter comprises means for asynchronously comparing (21) at least one parameter of the transmitted signal...

20060198464 - Distortion compensation apparatus: Provided is a distortion compensation apparatus which can correspond to the number of carriers adaptively. The apparatus includes a distortion compensation processing circuit multiplying an input signal by a distortion compensation coefficient; a distortion compensation coefficient storage storing the distortion compensation coefficient correspondingly to the input signal power; a distortion...

20060198465 - Systems and methods for the dynamic range compression of multi-bearer single-carrier and multi-carrier waveforms: The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of the waveform without expanding the spectral bandwidth of the allocated channels. Embodiments...

20060198466 - Systems and methods for the reduction of peak to average signal levels of multi-bearer single-carrier and multi-carrier waveforms: The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of the waveform without expanding the spectral bandwidth of the allocated channels. Embodiments...

20060198467 - Semi-synchronous receiver and apparatus for reading information: A receiver is described for delivering a data sequence (ak) at a data rate 1/T from an analog signal (Sa), the receiver comprising: a) converting means (40) for generating a received sequence (rn) by sampling the analog signal (Sa) with a sample rate of 1/Ts, whereby the sample rate 1/Ts...

20060198468 - Single and multiple sinewave modulation and demodulation techniques employing carrier-zero and carrier-peak data-word start and stop: A method for detecting encoded digital data from a substantially sinusoidal waveform, the encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at phase angles lying outside of...

20060198469 - Asymmetry compensator for partial response maximum likelihood (prml) decoder: An asymmetry compensator for a partial response maximum likelihood (PRML) decoder, which is utilized to remove and eliminate the asymmetric component of the regenerating signal read from the optical recording medium, thereby effectively solving the problem of the asymmetry of the optical disk regenerating signal. The compensator includes an offset...

20060198470 - Searching method for maximum-likelihood (ml) detection: The present invention relates to a method for searching a solution point of maximum-likelihood detection. The solution point locates at a symbol constellation. The method includes the following steps: determining a central point and a norm by a zero-forcing detection method; determining a searching range according to the central point...

20060198473 - Apparatus and method for detecting preambles according to ieee 802.11b wireless lan standard: The present invention relates to the field of wireless communication systems and in particular to an apparatus and a method for short preamble detection within the framework of the 802.11b standard. The present invention can be easily implemented in either the radio part (preferred embodiment) or the baseband part (general...

20060198471 - Matched filtering: A signal is filtered by multiplying its Fourier transform by the Fourier transform of a reference sequence to which the filtering is to be matched. The reference sequence (e.g. a Golay sequence pair) is defined as an iterative combination of shorter sequences and its Fourier transform is generated by an...

20060198474 - Method and system for down-converting and electromagnetic signal, and transforms for same: Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be...

20060198472 - Transmission system, transmitter device, and receiver device: A transmission system which is simple in construction and yet can effectively avoid inter-symbol interference. A transmitter device transmits a signal block while repeating the same signal block twice consecutively. A receiver device receives the signal blocks, performs Fourier transform operation on the two identical signal blocks at respective predetermined...

20060198475 - Apparatus and method for compensating iq imbalance in ofdm system with carrier frequency offset: An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase analog signals; an in-phase and quadrature-phase imbalance parameter estimation unit coupled to the mixer module for estimating a gain...

20060198477 - Carrier detection for multiple receiver systems: The present invention provides a method for carrier detection associated with the receipt of MIMO RF packet communications. This involves receiving multiple MIMO RF packet communications with multiple receiver pathways, wherein the RF packet communications each comprise a preamble and data. The RF packet communications are sampled by a carrier...

20060198476 - Multiple-input multiple-output multichip transceiver with correlated clokc signals: A multichip transceiver operates as part of a multiple-input multiple-output communication system. First receiver circuitry on a first integrated circuit processes radio-frequency (RF) signals received from a first signal source, and second receiver circuitry on a second integrated circuit processes RF signals received from a second signal source. Clock-signal generating...

20060198478 - Method and apparatus for determining an output sequence from an input sequence: A method and a device for determining an output sequence of output elements from an input sequence of input elements is provided, the method or the device being implemented according to a decision feedback equalizer. The adaptation of coefficients of the equalizer is performed on the basis of an estimated...

20060198479 - Data synchronizer system: A data synchronizer system includes at least two synchronizers for receiving a source pulse signal, a corresponding source clock, and a destination clock. At least two first memory units each have a destination clock input. A first switch has an input coupled to the source pulse signal and an output...

20060198481 - Apparatus and method for tracking a sampling clock of multi-carrier communication system: An apparatus and a method for tracking a sampling clock of a multi-carrier communication system are disclosed, the apparatus including a data removal module, a phase estimation module, and a sampling clock offset computation module. The data removal module is for generating a plurality of first and second data removal...

20060198480 - Method, article, and apparatus for a dynamic phase delay compensator: An apparatus, method, and article to dynamically adjust a data signal using a regenerated clock signal in an emulator to increase communication speed between the emulator and the evaluation board is disclosed. In one embodiment, this is achieved by applying a reference clock signal at a predetermined frequency to a...

20060198482 - Method and apparatus for maintaining a clock/data recovery circuit frequency during transmitter low power mode: A method, algorithm, software, architecture, circuit, and/or system for detecting an idle condition and maintaining a frequency of a clock/data recovery circuit are disclosed. In one embodiment, a method of maintaining a frequency of a clock/data recovery circuit can include the steps of: (i) comparing a difference value from a...