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:
Nov. 19, 1991
Filed:
Mar. 30, 1990
Ichiro Kaneko, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A device for use in processing a device input signal carrying a digital symbol sequence, a reception filter filters the device input signal and produces a filter output signal having a high order curvature distortion. The high order curvature distortion results in a predetermined frequency band from adjacent interference on the predetermined frequency band by other frequency bands adjacant to the predetermined frequency band. Responsive to the filter output signal, an adaptive amplitude equalizing unit equalizes the high order curvature distortion and produces as a first equalized signal. When the device input signal decreases, the adaptive amplitude equalizing unit overestimates the high order curvature distortion to produce intersymbol interference because of appropriately suppressing the other freqency bands by the reception filter. In order to resolve the problem, an adaptive transversal equalizing unit is connected to the adaptive amplitude equalizing unit and equalizes the intersymbol interference along a time axis of the first equalized signal to produce an output signal with the curvature distortion and the intersymbol interference suppressed.