Method for detecting a discrete symbol sequence from an observation signal, and viterbi processor implementing such method
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United States of America Patent
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May 14, 2002
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N/A
app pub date -
Mar 24, 1999
filing date -
Mar 25, 1998
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Expired
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Abstract
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 with the Viterbi algorithm and the metrics of a competitor path, which is optimal among all the paths leading to a different decision for the symbol in question is calculated, the metrics being considered on the whole length of the trellis.
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