Error correcting code decoder

Details Error correcting code decoder Error correcting code decoder

1982-09-23

1985-01-08

Atkinson, Charles E.

Excavating

364724, 375116, G06F 1110

Patent

active

044930801

ABSTRACT:
A method and apparatus which can significantly reduce the matched filter requirements in decoding cyclic block codes, and is particularly advantageous for decoding maximal length block codes, and other cyclic block codes in which the number of codewords is .ltoreq.2.sup.k where .sup.k is the number of data bits encoded into each codeword. The signal containing the codeword is concatenated with itself, then the concatenated signal is applied to a matched filter to provide a peaking signal at some point in time as the concatenated signal is passed through the matched filter. The position of the peaking signal relative to a predetermined instant of time is sensed whereby the identity of the codeword (and thus data) can be determined.

REFERENCES:
patent: 3432754 (1969-03-01), Schwartz
patent: 3883729 (1975-05-01), de Cremiers
patent: 4169286 (1979-09-01), Uzonoglu et al.
patent: 4203002 (1980-05-01), Nossen
patent: 4234930 (1980-11-01), Campbell
patent: 4240156 (1980-12-01), Doland
patent: 4290139 (1981-09-01), Walsh
patent: 4414676 (1983-11-01), Kraul et al.
Hsiao et al., Data Coding Techniques Using Low-Correlation Sequences, IBM Tech. Discl. Bulletin, vol. 13, No. 11, Apr. 1971, pp. 3544-3546.
Stein et al., Digital Matched Filters, Electronic Engineering, vol. 40, No. 484, Jun. 1968, pp. 341-342.

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