Syndrome assisted iterative decoder for turbo codes
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United States of America Patent
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Dec 30, 2003
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N/A
app pub date -
Sep 6, 2000
filing date -
Sep 6, 2000
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Abstract
A syndrome assisted iterative decoder (173) uses iterative processing to decode an input sequence. A syndrome-assisted decoder (216), which may operate independently of a soft-output decoder, provides a stopping algorithm for the soft output decoder (240). When the syndromes s.sub.0 and s.sub.1 generated for sequence v.sub.0 and v.sub.1, respectively, both equal 0, the soft output decoder is finished decoding the sequence of data. Additionally, the syndrome-assisted decoder can generate a modified error trellis used by the soft output decoder whereby the soft-output decoder operates on a simplified trellis providing improved decoder performance.
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