Title:
【発明の名称】適応制御ろ波器
Document Type and Number:
Japanese Patent JP2885269
Kind Code:
B2
Abstract:
An rms value of a sum signal series x = en + nu n calculated by adding a noise series to an error signal series of a known signal series and an unknown signal series, is calculated by an rms calculator. By means of an amplitude controller, x is output as is when ¦x¦ is smaller than a threshold value A proportional to the rms value. When ¦x¦ is greater than the threshold value A, a product signal calculated by multiplying the polarity of x with the threshold value is output. Utilizing the output of the amplitude controller, respective tap weights of filter is corrected to generate be tap weights Ck<(n)>. By this, switching control between a probability gradient LMS algorithm (LA) and a probability gradient sign algorithm (SA) can be performed smoothly. Thus, an adaptively controlled filter having an advantage of small residual error and fast convergence of LA and an advantage of satisfactory strength against disturbance, such as burst noise or so forth of SA, can be obtained.
More Like This:
Inventors:
KOIKE SHINICHI
Application Number:
JP1484295A
Publication Date:
April 19, 1999
Filing Date:
February 01, 1995
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H03H21/00; H04B3/04; H04B3/23; (IPC1-7): H03H21/00; H04B3/04; H04B3/23
Domestic Patent References:
| JP6104692A | ||||
| JP514131A | ||||
| JP4252609A |
Attorney, Agent or Firm:
Yanagi Kawa Shin