Process for the parallel-series code conversion of a parallel di

Details Process for the parallel-series code conversion of a parallel di Process for the parallel-series code conversion of a parallel di

1981-12-02

1988-12-27

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

375 19, 341 95, 341101, H04L 300

Patent

active

047946270

ABSTRACT:
The process for the code conversion of eight parallel bits into words with nine series bits uses among the nine-bit words on the one hand those having five "1" and four "0" and which do not have five consecutive bits and whereof none starts or finishes with four identical bits, as well as their complements to 1, and on the other words having six "1" and three "0" with a maximum of transitions, as well as their complements to 1. Two complementary digital frame synchronization words are chosen from among the nine-bit words not retained for coding and which are not found in a random series of coded words.

REFERENCES:
patent: 2950469 (1960-08-01), Raasch
patent: 3215779 (1965-11-01), Halm et al.
patent: 3631471 (1971-12-01), Griffiths
patent: 3753113 (1973-08-01), Maruta et al.
patent: 4352129 (1982-09-01), Baldwin
patent: 4387364 (1983-06-01), Shirota
Nachrichtentechnische Zeitschrift (N.T.Z.), vol. 27, No. 6, 1974, M. Caflisch et al: "Leistungsspektren von Blockcodes", pp. 219-224.

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