ANALYSIS OF FINITE-LENGTH ACOUSTIC ECHO CANCELLATION SYSTEM
The acoustic echo canceler using an adaptive transversal filter and the least mean-square (LMS) algorithm is the most effective technique to reduce acoustic echoes in a hands-free telephone system. However, the requirement of a very high order filter for each microphone results in difficulties in convergence and hardware implementation. In this paper, the performance of the finite length adaptive filter is studied. A formula which relates the echo cancellation to the filter size, N, is established. Detailed analysis shows that this finite filter length will have better performance using speech than white noise.
acoustic echo cancellation adaptive fir filter performance analysis of finite length aec