Soft symbol decoding
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United States of America Patent
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Nov 28, 1995
Grant Date -
N/A
app pub date -
Mar 8, 1994
filing date -
Mar 8, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is disclosed a soft symbol for use in a decoding process generated from a binary representation of a branch metric. When a hard decision bit is a zero, a preselected number of bits of a binary representation of the branch metric are concatenated with a hard decision bit to form the soft symbol. When the hard decision bit is a one, the ones complement of the preselected number of bits of the binary representation of the branch metric are concatenated with the hard decision bit to form the soft symbol. The concatenation function can be achieved using an exclusive OR function with the preselected bits of the binary representation of the branch metric and the hard decision bit to form the soft symbol. The hard decision bit may be selectable from more than one source.
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