Method and means for detecting partial response waveforms using

Details Method and means for detecting partial response waveforms using Method and means for detecting partial response waveforms using

1993-09-30

1995-07-04

Envall, Jr., Roy N.

Excavating

375290, G06F 1110, H03M 1300, H04L 2534, H04L 2549

Patent

active

054307449

ABSTRACT:
A Viterbi decoder having a recursive processor modified to process each node in a trellis of a partial response coded signal to shift the branch metric additions over the node to effectuate compare, select, add operation order on the predecessor survivor metrics terminating in that node, to compare the metrics of the predecessor sequences terminating in the node, to select a survivor sequence, and to add the shifted branch metrics to the metric of the selected survivor sequence.

REFERENCES:
patent: 4571734 (1986-02-01), Dolivo et al.
patent: 4644564 (1987-02-01), Dolivo et al.
patent: 5291524 (1994-03-01), Itakura et al.
patent: 5295142 (1994-03-01), Hatakeyama
"High-Speed Parallel Viterbi Decoding: Algorithm and VLSI-Architecture" Gerhard Fettweis and Heinrich Meyr--May 1991 IEEE Communications Magazine.

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