Viterbi decoding method and viterbi decoding apparatus

Details Viterbi decoding method and viterbi decoding apparatus Viterbi decoding method and viterbi decoding apparatus

1993-12-14

1996-08-06

Baker, Stephen M.

Excavating

H03M 1312

Patent

active

055441777

ABSTRACT:
In a Viterbi decoding method or apparatus, a reception code, produced by precoding a transmission code and transmitting the precoded transmission code through a partial response transmission path, is processed to detect whether the present state is a plus (+) merge, a minus (-) merge or a no merge state. A provisional value is estimated for the transmission code corresponding to the reception code, and the provisional value is stored in a buffer. When the present state is a (+) or (-) merge, that is, other than a no merge state, a decoded value is obtained for the transmission code and the provisional value in the buffer is updated with the decoded value.

REFERENCES:
patent: 3622986 (1971-11-01), Tang
patent: 4644564 (1987-02-01), Dolivo et al.
patent: 4837766 (1989-06-01), Yoshida
Ferguson, M., "Optimal Reception for Binary Partial Response Channels", Bell System Technical Journal, vol. 51, No. 2, Feb. 1972, pp. 493-505.
Kobayashi H., "Application of Probabilistic Decoding to Digital Magnetic Recording Systems", IBM J. Res. Develop., Jan. 1971, pp. 64-74
Ferguson, M., "Optimal Reception for Binary Partial Response Channels", The Bell System Technical J., Feb. 1972, pp. 493-505.

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