Distributed trellis encoder

Details Distributed trellis encoder Distributed trellis encoder

1985-03-01

1987-06-30

Sloyan, T. J.

Excavating

340347DD, 371 2, 375 26, 375 39, G06F 1110, H03M 1322

Patent

active

046776257

ABSTRACT:
In the transmitter of a data communication system using QAM, a plurality of trellis coders with delay units are used for forward error correction. The output of each encoder is modulated using QAM to generate sequential baud signal elements. The redundant data bits generated are distributed between several non-consecutive bauds. Likewise, at the receiver a plurality of distributed convolutional decoders are utilized to decode the received signal element. The distributed trellis decoder is self-synchronizing.

REFERENCES:
patent: 4087787 (1978-05-01), Acampora
patent: 4240156 (1980-12-01), Doland
patent: 4500994 (1985-02-01), McCallister et al.
patent: 4536878 (1985-08-01), Rattlingourd et al.

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