The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1998
Filed:
Jun. 29, 1995
Yuzo Kurokami, Tokyo, JP;
Hideki Matsuura, Tokyo, JP;
NEC Corporation, Tokyo, JP;
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.