Bidirectional trellis coding
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United States of America Patent
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Jan 14, 1997
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N/A
app pub date -
May 30, 1995
filing date -
Dec 20, 1990
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Abstract
A block code decoding method finds the highest path metric path in a forward direction of a trellis diagram from an initial state of the trellis diagram to a final state. Next, the highest path metric path is found in a backward direction from the final state back to the initial state. The metrics of these two highest path metric paths are compared and the path having the absolute highest metric, in either direction, is chosen as a most likely path through the trellis diagram.
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