The detection of symbols of a sequence on the basis of an observation signal is performed in accordance with a soft output Viterbi algorithm using a trellis. In order to assign a likelihood to a discrete estimation of a symbol, the difference between the metrics of the optimal path determined in accordance...http://www.google.com/patents/US6389574?utm_source=gb-gplus-sharePatent US6389574 - Method for detecting a discrete symbol sequence from an observation signal, and viterbi processor implementing such method