Viterbi decoder for wireline modems

Details Viterbi decoder for wireline modems Viterbi decoder for wireline modems

1985-03-13

1987-11-24

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 39, 375 99, 375118, 371 43, H04L 512, H04L 2706

Patent

active

047093773

ABSTRACT:
A Viterbi decoder is disclosed particularly suited for implementation in a microprocessor-based modem. The decoder calculates the branch metric corresponding to each point of a signal constellation by calculating the Euclidean distance between a received point and a subset of constellation points. Prior to the metric calculations, each received point is translated to the first quadrant and, if necessary, truncated.

REFERENCES:
patent: 4545054 (1985-10-01), Davis
patent: 4583078 (1986-04-01), Shenoy et al.

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