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. 27, 2004
Filed:
May. 18, 2000
Shinichi Koike, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An adaptive filter, a control method of the adaptive filter, and a storage medium storing therein a program for executing the control method thereof enable a tap weight control method to be provided in order to realize high speed convergence of an adaptive filter using sign-sign algorithm. The adaptive filter having a non-recursive filter obtains a correlation value in such a way that a sum between an error signal and an additive noise is multiplied by a value in every respective taps of input signal. The correlation value undergoes operation of a correlation non-linear processor to obtain a value. Such the value is multiplied by a step gain. An obtained product is utilized for updating above described respective tap weight coefficients. It causes a power-number of a power function to be controlled according to an estimated value of an electric power of the error signal while taking the non-linear function of the correlation non-linear processor to be the power function of the correlation value. The estimated value is obtained in such a way that it causes average value of the correlation value to be calculated by a leakage accumulator before squaring the average value.