Trellis coding method and arrangement for fractional bit rates

Details Trellis coding method and arrangement for fractional bit rates Trellis coding method and arrangement for fractional bit rates

1989-05-30

1990-07-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

371 43, H04R 1402

Patent

active

049411543

ABSTRACT:
A signal coding technique for use with fractional bit rates is disclosed which, for a given dimensionality, allows the use of smaller constellations, and thus provides greater robustness in the presence of various impairments, than would otherwise be the case yet entails essentially no decoding delay penalty. In this technique, one or more of the input bits are trellis encoded and the trellis-encoded bits identify one of a predetermined plurality of subsets of the signal constellation and the particular symbols selected for transmission from two or more identified subsets are chosen by the non-trellis-encoded bits interdependently.

REFERENCES:
patent: 3925611 (1975-12-01), Dennis
patent: 4483012 (1984-11-01), Wei
patent: 4660214 (1987-04-01), Pahlavan et al.

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