Interference cancellation system based on the LMS algorithm

Author

Campos, Patricia Fernandes

Author_Institution

At&T Network Syst. Nederland B.V., Hilversum, Netherlands

Volume

4

fYear

1992

fDate

23-26 Mar 1992

Firstpage

237

Abstract

Interference cancellation, which is concerned with the removal of such extraneous information as periodic interference signals superposed on audio frequency signals, is addressed. Low-frequency (audio range) processed signals often suffer from disturbance by interference. The quality of these signals would be greatly improved if this interference, for example, clock hum-interference, could be removed from the signal. Adaptive filtering techniques which are able to lock-in on the frequency of the interference and to track its changes are required. In order to achieve this, a reference signal should be available which is strongly correlated with the interference only. To this purpose, the least-mean-square (LMS) algorithm implemented according to White (1975) and Feintuch (1976) is considered

Keywords

adaptive filters; audio signals; digital filters; filtering and prediction theory; interference suppression; least squares approximations; switched capacitor filters; LMS algorithm; adaptive filtering; audio frequency signals; clock hum-interference; interference cancellation system; recursive filters; switched capacitor implementation; transversal filters; Adaptive filters; Band pass filters; Decorrelation; Delay; Frequency; Interference cancellation; Interference elimination; Least squares approximation; Noise cancellation; Transversal filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on

Conference_Location

San Francisco, CA

ISSN

1520-6149

Print_ISBN

0-7803-0532-9

Type

conf

DOI

10.1109/ICASSP.1992.226442

Filename

226442