Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-01-31
2006-01-31
Torres, Joseph D. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S795000
Reexamination Certificate
active
06993703
ABSTRACT:
A decoder for performing log-sum corrections by means of a linear approximation, putting stress on speed, with a reduced circuit dimension without adversely affecting the decoding performance of the circuit. The decoder includes a linear approximation circuit that computes the log-sum corrections using the function F=−a P−Q+b, where the coefficient −a represents the gradient of the function and the coefficient b represents, the intercept and are expressed by a power exponent of 2.
REFERENCES:
patent: 6393076 (2002-05-01), Dinc et al.
S. Benedetto, D. Divsalar, G. Montorsi, and F. Pollara, Soft-Output Decoding Algorithms in Iterative Decoding of Turbo Codes, TDA Progress Report 42-124, NASA Code 315-91-20-20-53.
S. Benedetto, D. Divsalar, G. Montorsi, and F. Pollara, A Soft-Input Soft-Output Maximum A Posteriori (MAP) Module to Decod Parallel and Serial Concatenated Codes, TDA Progress Report 42-127, NASA Code 315-91-20-20-53.
Robertson, P.; Villebrun, E.; Hoeher, P.; A comparison of optimal and sub-optimal MAP decoding algorithms operating in the lo domain, IEEE International Conference on Communications, vol.: 2, Jun. 18-22, 1995, Page(s): 1009-1013.
Jah-Ming Hsu; Chin-Liang Wang; On finite-precision implementation of a decoder for turbo codes; Proceedings of the 1999 IEEE International Symposium on Circuits and Systems, vol.: 4, May 30-Jun. 2, 1999, Page(s): 423-426.
Cheng J-F et al: “Linearly Approximated Log-MAP Algorithms for Turbo Decoding” VTC 2000-Spring. 2000 IEEE 51st. Vehicular Technology Conference Proceedings. Tokyo, Japan, May 15-18, 2000, IEEE Vehicular Technology Conference, New York, NY: IEEE, US, vol. 3 of 3. Conf. 51, May 15, 2000, pp. 2252-2256, XP000968405 ISBN: 0-7803-5719-1.
“Simplified Log-MAP Algorithm” Research Disclosure, Kenneth Mason Publications, Hampshire, GB, No. 421, May 1999, p. 612 XP000888685 ISSN: 0374-4353.
Frommer William S.
Frommer & Lawrence & Haug LLP
Simon Darren M.
Sony Corporation
Torres Joseph D.
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