基于Harr小波变换的自适应声回波对消

用基于Ｈａｒｒ小波变换的自适应滤波器对具有不同冲激响应的实际声回援系统进行辨识，在自适应回声对消器中可以只用少量的权达到足够大的对消比，该方法运算量小，收敛快，适用于对实际声回波对消问题的解决。相应的，基于ＦＩＲＬＭＳ的对该问题的解决方案所需的权数要多的多。

HARR WAVELET BASED ADAPTIVE ACOUSTIC ECHO CANCELLATION

Using a small number of coefficents in Harr wavelet based models,the authors can efficently identify acoustic echo systems with different impulse reponses.Comparing with FIR LMS the wavelet based adaptive canceller can obtain high cancellation ratio and fast convergence only with small number of adjustment weights.Computer simulations for the practical acoustical echo channels proved these advantages.