Hiline interference eliminator

Details Hiline interference eliminator Hiline interference eliminator

1981-10-07

1985-07-02

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 43, 333 12, G01V 136

Patent

active

045272611

ABSTRACT:
The invention is a method and apparatus for substantially eliminating from a seismic signal channel an interfering hiline signal in a differential mode. Differential mode and common mode components of the interfering signal are coupled from the seismic signal channel, and are correlated with each other to obtain a correlation signal. The correlation signal and the common mode signal are multiplied to obtain a correction signal that is applied to the seismic signal channel to substantially eliminate the differential mode component of the hiline interference signal. The correlation between the differential mode and common mode signals is accomplished with both in-phase and quadrature phase components of one of them so that two correlation signals actually are produced.

REFERENCES:
patent: 2164196 (1939-06-01), Woodyard et al.
patent: 2733412 (1956-01-01), Alexander et al.
patent: 3163750 (1964-12-01), Lindsey et al.
patent: 4105942 (1978-08-01), Henry
patent: 4210825 (1980-07-01), Crochiere et al.
patent: 4232379 (1980-11-01), Ensing

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