Code sequence generator for a digital transmission line fault lo

Details Code sequence generator for a digital transmission line fault lo Code sequence generator for a digital transmission line fault lo

1986-05-27

1988-05-17

Atkinson, Charles E.

Excavating

379 4, H04M 326

Patent

active

047456035

ABSTRACT:
A digital transmission line fault location signal generator includes a maximal length linear feedback shift register having m stages for generating a first pseudorandom sequence of binary signals with a period 2.sup.m -1. The first pseudorandom sequence of binary signals is delayed by n time slots into a second pseudorandom sequence of binary signals. A circuit merges the first and second pseudorandom sequences of binary signals into a combined sequence of signals on the digital transmission line.

REFERENCES:
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patent: 3725860 (1973-04-01), Kemper et al.
patent: 3986168 (1976-10-01), Anderson
patent: 4348597 (1982-09-01), Weber
patent: 4408298 (1983-10-01), Ruhland
patent: 4493046 (1985-01-01), Watanabe
patent: 4507621 (1985-03-01), Meyer
The Digital Logic Handbook, Digital Equipment Corporation, 1966, p. 121.
"Understanding Pseudo-Random Circuits", Radio Electronics, D. Lancaster, Apr. 1975, pp. 42-49.
"Measuring Digital Error Rate with Pseudorandom Signals", Telecommunications, E. S. Donn, Nov., 1971, pp. 28, 30, 32, 62.

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