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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:

Patent Number Title Of Patent Date Issued
6526538 Turbo product code decoder Feb. 25, 2003
6522696 Adaptive frequency correction in a wireless communications system, such as for GSM and IS54 Feb. 18, 2003
6522705 Processor for digital data Feb. 18, 2003
6507621 Communication device and communication method Jan. 14, 2003
6507628 Distortion-compensated digital communications receiver and method therefor Jan. 14, 2003
6504868 Adaptive equalizer Jan. 7, 2003
6504881 Viterbi decoder with enhanced test function Jan. 7, 2003
6504882 Add-compare-select circuit for viterbi decoder Jan. 7, 2003
6496489 Method and apparatus for distinguishing between a digital control channel and a digital traffic channel in a radiocommunication system Dec. 17, 2002
6490327 System and method for self-adaptive maximum likelihood sequence detection using a T-algorithm Dec. 3, 2002
6487255 Information generation for coherent demodulation of differentially encoded signals Nov. 26, 2002
6473472 Adaptive array communication system and receiver Oct. 29, 2002
6470474 Method and apparatus for identifying errors in a detected sequence of values Oct. 22, 2002
6463105 Methods and systems for estimation of the carrier to interference ratio for a wireless communication channel Oct. 8, 2002
6459745 Frequency/timing recovery circuit for orthogonal frequency division multiplexed signals Oct. 1, 2002
6452964 Adaptive modulation method Sep. 17, 2002
6452983 Demodulator for improving reception performance in satellite and Mobile communications Sep. 17, 2002
6452984 Metric biasing for maximum likelihood sequence estimators Sep. 17, 2002
6452985 Viterbi decoding apparatus and Viterbi decoding method Sep. 17, 2002
6448910 Method and apparatus for convolution encoding and viterbi decoding of data that utilize a configurable processor to configure a plurality of re-configurable processing elements Sep. 10, 2002
6445755 Two-step soft output viterbi algorithm decoder using modified trace back Sep. 3, 2002
6445757 Diversity combining method, and receiver Sep. 3, 2002
6446236 Reading encoded information subject to random and transient errors Sep. 3, 2002
6442211 System for digital information transmission with associated methods and devices Aug. 27, 2002
6438112 Device and method for coding information and device and method for decoding coded information Aug. 20, 2002
6438181 Efficient metric memory configuration for a Viterbi decoder Aug. 20, 2002
6434203 Memory architecture for map decoder Aug. 13, 2002
6434717 Error detecting device and method Aug. 13, 2002
6424685 Polar computation of branch metrics for TCM Jul. 23, 2002
6418172 Look-ahead maximum likelihood sequence estimation decoder Jul. 9, 2002
6411654 Convolutional interleaver, convolutional deinterleaver, convolutional interleaving method, and convolutional deinterleaving method Jun. 25, 2002
6411663 Convolutional coder and viterbi decoder Jun. 25, 2002
6405341 Multi-dimensional pseudo noise generating circuit for soft-decision decoding Jun. 11, 2002
6396878 Reception method and a receiver May. 28, 2002
6393075 Method and device for source-controlled channel decording using kalman filter May. 21, 2002
6389079 Non-coherent sequence estimation receiver for digital modulations May. 14, 2002
6385254 Transmission method and radio system May. 7, 2002
6381271 Low complexity decision feedback sequence estimation Apr. 30, 2002
6370201 Simplified branch metric calculation in pragmatic trellis decoders Apr. 9, 2002
6366624 Systems and methods for receiving a modulated signal containing encoded and unencoded bits using multi-pass demodulation Apr. 2, 2002
6363122 Coding apparatus and decoding apparatus Mar. 26, 2002
6359934 Adaptive modulation method Mar. 19, 2002
6359935 Method for iterative demodulation and decoding for a system with coding and differential demodulation Mar. 19, 2002
6356586 Methods and apparatus for parallel decision-feedback decoding in a communication system Mar. 12, 2002
6356595 Method and apparatus for decoding continuously coded convolutionally encoded messages Mar. 12, 2002
6353640 Reconfigurable radio frequency communication system Mar. 5, 2002
6347122 Optimal complement punctured convolutional codes for use in digital audio broadcasting and other applications Feb. 12, 2002
6347124 System and method of soft decision decoding Feb. 12, 2002
6347390 Data encoding method and device, data decoding method and device, and data supply medium Feb. 12, 2002
6343103 Methods and apparatus for representation of branch metrics in a communication system decoder Jan. 29, 2002

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