US PATENT SUBCLASS 375 / 262
.~.~.~ Maximum likelihood decoder or viterbi decoder

Current as of: June, 1999
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375 /   HD   PULSE OR DIGITAL COMMUNICATIONS

259  DF  SYSTEMS USING ALTERNATING OR PULSATING CURRENT {4}
260  DF  .~ Plural channels for transmission of a single pulse train {2}
261  DF  .~.~ Quadrature amplitude modulation {4}
262.~.~.~ Maximum likelihood decoder or viterbi decoder

DEFINITION

Classification: 375/262

Maximum likelihood decoder or viterbi decoder:

(under subclass 261) Subject matter for choosing an estimate code word for each possible received sequence of a demodulation output.

(1) Note. This method is generally used for decoding the convolution codes.

SEE OR SEARCH CLASS

714, Error Detection/Correction and Fault Detection/Recovery,

786+, for digital data error correction having a convolution code, particularly subclasses 794 and 795 for maximum likelihood and Viterbi decoding.