International Workshop on Hands-Free Speech Communication (HSC2001) April 9-11, 2001 Kyoto, Japan

Adaptive Step-Size Control Using Orthogonality Principles for Acoustic Echo Cancellation

Jang Sik Park, Jin Youl Lee, and Kyung Sik Son

(1) Dept. of Visual Technologies, Dongeui Institute of Technology, Korea
(2) Dept. of Electronics Eng., Pusan National University, Korea

This paper presents a new time-varying step-size LMS algorithm for acoustic echo cancellation. The step-size is controlled by the cross-correlation of primary input signals and estimation error signals of adaptive filter. The cross-correlation is estimated by low-pass filtered instantaneous gradient estimate of LMS algorithm. And the step-size is normalized by sum of the input signal and error signal powers. The proposed algorithm has good performance at double-talk situation and faster convergence speed. As results of computer simulations, it is shown that the performance of the proposed algorithm is better than conventional ones.

Full Paper

Bibliographic reference.  Park, Jang Sik / Lee, Jin Youl / Son, Kyung Sik (2001): "Adaptive step-size control using orthogonality principles for acoustic echo cancellation", In HSC2001, 87-90.