Method for detecting information bits processed by concatenated

Details Method for detecting information bits processed by concatenated Method for detecting information bits processed by concatenated

1994-11-18

1996-10-08

Envall, Jr., Roy N.

Excavating

371 371, H03M 1300

Patent

active

055638970

ABSTRACT:
The transmitted bits are coded according to the product of at least two systematic block codes. An iterative decoding is applied in order to determine, at each code word search step, a data matrix and a decision matrix which are used for the following step. The new decision matrix is determined at each step by decoding the rows or the columns of the input matrix, and the new data matrix is determined by taking account of correction terms which increase the reliability of the decoding at each iteration. The method is especially suited for use with high-efficiency block codes.

REFERENCES:
patent: 5181207 (1993-01-01), Chapman
IEEE Transactions on Information Theory, vol. 36, N.degree.3, May 1990, New York US-"On decoding concatenated codes" -Hassan & Stark pp. 677-683.
IEE Proceedings I. Solid-State & Electronic Devices, vol. 136, N.degree.1 Feb. 1989, "Error control techniques applicable to HF channels" Bate & Honary & Farrell-pp. 57-63.
Proceedings ICC'93, Geneva, May 1993-"Separable MAP filters for the decoding of product and concatenated codes" -Lodge et al. pp. 1740-1745.
IEEE Transactions on Information Theory, vol. IT 20, Mar. 1974 "Optimal Decoding of Linear Codes for Minimizing Symbol Error Rate" -BAHL et al-pp. 284-287.
IEEE Transactions on Information Theory, vol. IT 18, N.degree.1, Jan. 1972-"Random Error and Burst Correction by Iterated Codes" -S. M. Reddy et al-pp. 182-185.

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