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Browse by Category: Main > Communications
Class Information
Number: 375/262
Name: Pulse or digital communications > Systems using alternating or pulsating current > Plural channels for transmission of a single pulse train > Quadrature amplitude modulation > Maximum likelihood decoder or viterbi decoder
Description: Subject matter for choosing an estimate code word for each possible received sequence of a demodulation output.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6741664 Low-latency high-speed trellis decoder May. 25, 2004
6728319 Decoding method and apparatus Apr. 27, 2004
6721916 System and method for trellis decoding in a multi-pair transceiver system Apr. 13, 2004
6721366 Phase tracking apparatus and method for continuous phase modulated signals Apr. 13, 2004
6717990 Communication system and method for multi-rate, channel-optimized trellis-coded quantization Apr. 6, 2004
6718511 Method and apparatus to detect a signal received from a channel signal Apr. 6, 2004
6714596 BS digital broadcast receiver Mar. 30, 2004
6711213 Implementing reduced-state viterbi detectors Mar. 23, 2004
6711218 System and method for received signal decoding Mar. 23, 2004
6707849 Methods, receivers and equalizers having increased computational efficiency Mar. 16, 2004
6707859 Reception method and receiver using several different transport formats Mar. 16, 2004
6700937 Iterative decoding Mar. 2, 2004
6697442 Viterbi decoding apparatus capable of shortening a decoding process time duration Feb. 24, 2004
6697443 Component decoder and method thereof in mobile communication system Feb. 24, 2004
6694474 Channel coding with unequal error protection for multi-mode source coded information Feb. 17, 2004
6690737 Device and method for determining maximum likelihood state in a decoding device Feb. 10, 2004
6690738 Trellis coded modulation system employing a flexible trellis coded modulation decoder Feb. 10, 2004
6690945 Method for suppressing transients using a pulse shaping look-up table Feb. 10, 2004
6683914 Method for convolutive encoding and transmission by packets of a digital data series flow, and corresponding decoding method device Jan. 27, 2004
6683915 Multi-bit per symbol rate quadrature amplitude encoding Jan. 27, 2004
6683922 Data decoding apparatus and data decoding method Jan. 27, 2004
6678339 Globally optimum maximum likelihood estimation of joint carrier frequency offset and symbol timing error in multi-carrier systems Jan. 13, 2004
6671326 Method of detecting, blind, the coding mode used for digital data Dec. 30, 2003
6661282 Demodulation apparatus and method in a communication system employing 16-ary QAM Dec. 9, 2003
6662338 Parity- sensitive Viterbi detector and method for recovering information from a read signal Dec. 9, 2003
6654929 Viterbi decoder and Viterbi decoding method Nov. 25, 2003
6650713 Maximum likelihood sequence estimation apparatus Nov. 18, 2003
6633615 Trellis transition-probability calculation with threshold normalization Oct. 14, 2003
6625208 Modem using batch processing of signal samples Sep. 23, 2003
6621871 Incremental redundancy packet combiner and decoder Sep. 16, 2003
6597742 Implementing reduced-state viterbi detectors Jul. 22, 2003
6597743 Reduced search symbol estimation algorithm Jul. 22, 2003
6594318 Method and apparatus for computing soft decision input metrics to a turbo decoder Jul. 15, 2003
6594795 Viterbi decoder using a reverse trellis diagram Jul. 15, 2003
6580762 Rate matching method Jun. 17, 2003
6580767 Cache and caching method for conventional decoders Jun. 17, 2003
6581181 Dominant error correction circuitry for a Viterbi detector Jun. 17, 2003
6581182 Iterative decoding with post-processing of detected encoded data Jun. 17, 2003
6578119 Method and device for memory management in digital data transfer Jun. 10, 2003
6574283 Communication method, transmission and reception apparatuses, and cellular radio communication system Jun. 3, 2003
6574289 Method for determining frame rate of a data frame in a communication system by using apriori knowledge of data frame Jun. 3, 2003
6574290 Digital information reproducing apparatus and reproducing method Jun. 3, 2003
6567390 Accelerated message decoding May. 20, 2003
6567481 Receivers including iterative map detection and related methods May. 20, 2003
6563877 Simplified block sliding window implementation of a map decoder May. 13, 2003
6535345 Signal processing apparatus and signal processing method Mar. 18, 2003
6535554 PCS signal separation in a one dimensional channel Mar. 18, 2003
6529557 Add-compare selection circuit Mar. 4, 2003
6529558 Coding and decoding a signal modified in accordance with the feedback states of an encoder Mar. 4, 2003
6529559 Reduced soft output information packet selection Mar. 4, 2003

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