Method and apparatus for decoder optimization

Details Method and apparatus for decoder optimization Method and apparatus for decoder optimization

1994-09-14

1996-11-19

Baker, Stephen M.

Excavating

371 377, 371 43, H03M 1300, H03M 1312

Patent

active

055770533

ABSTRACT:
In a communications system, a message to be transmitted is used to generate an error detection checkword. Both the message and checkword are encoded into a communication traffic signal using an error correction code. An error correction decoder decodes a received traffic signal, generating a plurality of candidate decoded signals and quantitative measurements of the reliability of the candidates. An error detection calculator tests the most reliable candidate for compliance between its decoded message and checkword. If there is compliance, that candidate and its decoded message are selected. If there is no compliance, the next most reliable candidate is tested for compliance, the selection process continuing until compliance is found. If no compliance is found among all the candidates, an error corrector scrutinizes the most reliable candidate for the presence of a correctable error, and the corrected candidate is re-tested for compliance. If there is still no compliance, the next most reliable candidate is scrutinized for the presence of a correctable error, and the corrected candidate is retested for compliance, the process continuing until compliance is found, up to the limits of the error correction capability of the error corrector.

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