Locating noise in communications systems

Details Locating noise in communications systems Locating noise in communications systems

1979-10-10

1981-12-01

Blum, Theodore M.

H04B 346

Patent

active

043038085

ABSTRACT:
An impulse noise source in a bidirectional submerged communications system is positionally located by detection apparatus at one end of the system which measures the time interval between the same impulse arriving twice at the one end of the system, firstly, via a shorter or faster path in the system (either the incoming path to the one end, or a reference frequency band in the incoming path) and, secondly, via a longer or slower path in the system (either the go path from the noise source, a go/return distant loop and the incoming path, or another frequency band in the incoming path). Group delay distortion of the system affects the location accuracy and is equalized by networks in the detection apparatus.

REFERENCES:
patent: 3710239 (1973-01-01), Nakamura

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