Turbo decoder employing simplified log-map decoding

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

2007-07-17

2007-07-17

Baker, Stephen M. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S780000, C714S786000, C714S794000

Reexamination Certificate

active

10412906

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.

REFERENCES:
patent: 4811346 (1989-03-01), Battail
patent: 5181209 (1993-01-01), Hagenauer et al.
patent: 5933462 (1999-08-01), Viterbi et al.
patent: 6028899 (2000-02-01), Petersen
patent: 6233290 (2001-05-01), Raphaeli
patent: 6389574 (2002-05-01), Belveze et al.
patent: 6597743 (2003-07-01), Khayrallah et al.
patent: 6658071 (2003-12-01), Cheng
patent: 6700937 (2004-03-01), Turin
patent: 7031406 (2006-04-01), Li et al.
patent: 2001/0054170 (2001-12-01), Chass et al.
patent: 2002/0124227 (2002-09-01), Nguyen
patent: 2002/0162074 (2002-10-01), Bickerstaff
patent: 2003/0002603 (2003-01-01), Worm et al.
patent: 2003/0101402 (2003-05-01), Amrani et al.
patent: 2003/0154441 (2003-08-01), Nieminen
patent: 2004/0005019 (2004-01-01), Smith et al.
patent: 2005/0198551 (2005-09-01), Rouxel
Chaikalis et al., “Reconfiguration Between Soft Output Viterbi and Log Maximum A Posteriori Decoding Algorithms”, 1stIntl. Conf. on 3G Mobile Communication Technologies, May 2000, pp. 316-320.
Robertson et al., “A Comparison of Optimal and Sub-Optimal MAP Decoding Algorithms Operating in the Log Domain” IEEE ICC 95, Jun. 1995, pp. 1009-1013.
Wang et al., “A Unified Structure of the Trellis-Based Soft-Output Decoding Algorithms for Turbo Codes” IEEE ISIT 2001, Jun. 2001, p. 319.
Chen, J., et al., “Bi-Directional SOVA Decoding for Turbo-Codes”, IEEE Communications Letters, vol. 14, No. 12, Dec. 2000, pp. 405-407.

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