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:
Jun. 03, 1997
Filed:
Jun. 15, 1995
Shigeji Ikeda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an adaptive filter, each of first through N-th taps belongs to either one of first through M-th tap groups. A first generating section (31) generates a specific one of the first through the M-th tap groups. A second generating section (32 to 34, 37, 38) generates a tap select signal in accordance with first through K-th tap gains and the specific tap group, where a positive integer K is less than a positive integer N. By the tap select signal, a tap select section (22) connects first through K-th selected taps to a filter section (20-1 to 20-(N-1), to 24-1 to 24-K, 25-1 to 25-K, 26, 27). A control section (40, 41, 52, 53) is responsive to the tap select signal for controlling the first generating section to make the first generating section generate a renewal one of the first through the M-th tap groups as the specific tap group.