Title :
A mu -vector LMS adaptive system for enhancing nonstationary narrow-band signal
Author :
Chen, Jiande ; Vandewalle, Joos
Author_Institution :
Dept. of Electr. Eng., Katholieke Univ., Leuven, Belgium
Abstract :
The performance of a least-mean square (LMS) adaptive filter with respect to the feedback factor mu in both stationary and nonstationary environments are outlined and investigated by simulations. A mu -vector LMS algorithm that is an extension of the conventional LMS algorithm is proposed. In the proposed algorithm, different values of feedback factor are used for different taps. Computer simulation results are given and it is proved that the authors´ algorithm performs better than the conventional LMS algorithm in a nonstationary environment. Using the proposed algorithm, a two-stage adaptive system is suggested, the first stage of which is an adaptive line enhancer. The application of the method to biomedical signal processing is discussed.<>
Keywords :
adaptive filters; filtering and prediction theory; least squares approximations; signal processing; LMS adaptive system; adaptive filter; adaptive line enhancer; biomedical signal processing; feedback factor; least-mean square; mu -vector LMS algorithm; nonstationary narrow-band signal; tapped delay line; two-stage adaptive system; Adaptive filters; Adaptive systems; Application software; Biomedical signal processing; Computational modeling; Computer simulation; Feedback; Least squares approximation; Line enhancers; Signal processing algorithms;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15039
