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:
Jan. 06, 2004
Filed:
Apr. 26, 2000
Hitoshi Matsui, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an adaptive type signal estimator, an estimation signal storage unit outputs the first sample signal to which nonlinear distortion is added. A convolution arithmetic unit adds linear distortion to the first sample signal and outputs the second sample signal. A coefficient corrector receives the first sample signal, reception signal, and the determination signal, and corrects the second sample signal. The coefficient corrector obtains a difference signal based on a replica generated from the reception signal and first sample signal and a delayed reception signal obtained by delaying the reception signal by a predetermined period of time, obtains a product signal by multiplying the difference signal by a convergence factor, updates an impulse response value by using the product signal, and outputs the updated impulse response value to the convolution arithmetic unit.