Viterbi decoder of partial response maximum likelihood channel

Details Viterbi decoder of partial response maximum likelihood channel Viterbi decoder of partial response maximum likelihood channel

2006-12-05

2006-12-05

Ghebretinsae, Temesghen (Department: 2637)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S262000, C714S795000, C714S796000

Reexamination Certificate

active

07145968

ABSTRACT:
A Viterbi decoder of a partial response maximum likelihood channel. In an optical disc drive, a system of partial response maximum likelihood has an analog/digital converter. This analog/digital converter receives an analog signal and outputs a digital signal to a Viterbi decoder. The Viterbi decoder has an adaptive level Viterbi decoder, a signal level mapping algorithm, a received signal delay chain, a hard decoder, and a multiplexer. The adaptive level Viterbi decoder and the hard decoder receive a digital signal output from the analog/digital converter to decode simultaneously. Whether the output of the multiplexer is the decision bit of the adaptive level Viterbi decoder or the hard decoder is determined by the mode selection algorithm.

REFERENCES:
patent: 5802116 (1998-09-01), Baker et al.
patent: 6101227 (2000-08-01), Glover
Error Control Systems for Digital Communication and Storage, Stephen B. Wicker, 1995, pp. 296-297.
IEEE Optical Data Storage, 2000 Conference Digest 2000, pp. 21-23.

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