Methods of, and apparatus for, producing code words
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United States of America Patent
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May 27, 2008
Grant Date -
Apr 15, 2004
app pub date -
Dec 4, 2001
filing date -
Dec 21, 2000
priority date (Note) -
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Abstract
Datawords encoded using a first-order Reed-Muller code are decoded using a Fast Hadamard Transform (FHT). Where the dataword is known to comprise a number of unused bits at one end, the soft decisions of the codeword are reordered. Majority polling is then performed on groups of the soft decisions to produce a series of soft decisions which make up a new codeword. The new codeword is then decoded using an FHT of lower order than the FHT applicable to the originally received codeword.
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