Maximum likelihood decoder
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United States of America Patent
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Apr 18, 1989
Grant Date -
N/A
app pub date -
Apr 16, 1987
filing date -
Apr 16, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A maximum likelihood decoder for decoding a code from a signal transmitted through quadrature amplitude modulation of a code including a convolutional code can decode at high speed and high accuracy with a simple hardware configuration. In the maximum likelihood decoding of the convolutional code, the metric processing is not carried out for all of the possible paths and states but a smaller number of path(s) (metric(s)) and state(s) (metric(s)) are selected in a descending order to determine survival paths.
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