Symbol coding apparatus

Details Symbol coding apparatus Symbol coding apparatus

1982-11-08

1985-12-31

Miska, Vit W.

Communications: electrical

Audible indication

Percussion-type sound producer

375 27, H03K 1324

Patent

active

045624267

ABSTRACT:
In apparatus for transmitting digital symbols over a band-limited channel using a modulated carrier system by encoding the symbols into discrete signals selected by a finite state encoder from a signal alphabet comprised of subsets each corresponding to transitions from a particular previous state to a particular current state of the encoder, the improvement in which at least two of the subsets have a signal in common, and at least one signal belongs to only one of the two subsets.

REFERENCES:
patent: 3887768 (1975-06-01), Forney, Jr. et al.
patent: 4077021 (1978-02-01), Csajka et al.
patent: 4114710 (1978-09-01), Katoh et al.
patent: 4483012 (1984-11-01), Wei
patent: 4493082 (1985-01-01), Cumberton et al.
Ungerboeck, "Channel Coding With Multilevel Phase Signals", IEEE Transactions & Theory, vol. IT-28, #1, 1/82.
Forney, "The Viterbi Algorithm", Proceedings of the IEEE, vol. 61, #3, 3/73.

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