Patent ID: 6327317
Filing Date: 2001-12-04
Classification: H04L

Abstract:
A method of performing combined equalization and decoding of codewords encoded in a block coded modulation (BCM) symbol sequence that has been received from a channel, wherein each of the codewords comprises a plurality of symbols, the method comprising:determining channel impulse response estimates corresponding to each received symbol of the BCM symbol sequence;advancing a maximum likelihood sequence estimation trellis from one stage to a next stage by updating a path metric having dependence upon the channel impulse response estimates and upon symbols of a codeword corresponding to a state in a previous trellis stage;producing a completed trellis by repeating the trellis-advancing step until all stages of the trellis are completed; anddecoding the codewords contained in the BCM symbol sequence by using a traceback along the best path in the completed MLSE trellis.