Apparatus and method for interference compensation

Details Apparatus and method for interference compensation Apparatus and method for interference compensation

1995-06-29

1998-08-04

Pham, Chi H.

Pulse or digital communications

Equalizers

Automatic

375235, 3647242, H03H 730, H03H 740

Patent

active

057905975

ABSTRACT:
An interference compensator for compensating interference waves with long delay times generated during digital microwave communications system-based relaying of waves at a single frequency. The compensator receives a demodulated digital signal, passes the signal through shift registers with different delay times, and then, through a forward equalizer, a first backward equalizer, a second backward equalizer and a center equalizer. All equalizers are transversal type equalizers, outputs from which are added as an output. In addition, the compensator is equipped with a delay time control circuit which monitors the tap coefficients of the forward equalizer, the backward equalizers and the center equalizer and controls the delay times of the shift registers so that the tap coefficients become greatest at the center delay circuits of the respective transversal type filters.

REFERENCES:
patent: 5495501 (1996-02-01), Iwamatsu et al.

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