Turbo decoder employing simplified log-map decoding

Details Turbo decoder employing simplified log-map decoding Turbo decoder employing simplified log-map decoding

2006-12-05

2006-12-05

Baker, Stephen M. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S780000, C714S786000

Reexamination Certificate

active

07146554

ABSTRACT:
A turbo decoder iteratively decodes a received, encoded signal with one or more constituent decoders employing a simplified log-maximum a posteriori (SMAP) decoding algorithm. The SMAP decoding algorithm calculates reliability information as a log likelihood ratio for a log-MAP algorithm using a reduced set of path metrics recursively updated based on maximum likelihood recursion. Updated extrinsic information for a subsequent decoding may be derived from the LLR calculated by the SMAP decoding algorithm.

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