Digital communication system

Details Digital communication system Digital communication system

1993-01-14

1995-07-18

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

375290, 375341, 371 43, 371 55, H04L 512

Patent

active

054348862

ABSTRACT:
A digital communications system suitable for high-speed data transmission includes a transmitter and a receiver providing the ability to selectively switch between multiple coding and decoding methods. The transmitter includes a plurality of trellis coders, each of which performs a different type of coding on a transmission signal. The receiver includes a plurality of Viterbi decoders, corresponding to the different types of coders in the transmitter, for decoding the transmission signal. The receiver also includes a selector for determining which of the decoder outputs to choose from based on the frequency of code violations detected in the transmission signal. The present invention thus provides a flexible apparatus for improving the quality of high-speed data transmissions.

REFERENCES:
patent: 4677625 (1987-06-01), Betts et al.
patent: 5040191 (1991-08-01), Forney, Jr. et al.
patent: 5113411 (1992-05-01), Yoshida et al.
patent: 5243627 (1993-09-01), Betts et al.
patent: 5287374 (1994-02-01), Parr
patent: 5287385 (1994-02-01), Supawara et al.

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