一种简化的自适应回声抵消算法及其应用分析

Revised Frequency Optimal Algorithm and Its Application in Acoustic Echo Cancellation

声学回声抵消器可视为一横向自适应滤波器,声学回声抵消技术在现代信号处理中得到越来越广泛的应用。在讨论了声学回声抵消基本原理后,提出了一种基于自适应滤波技术的声学回声抵消简化频域FDAF-MDFTP算法,并对该算法特性以及对声学回声返回损失增加度的影响进行了分析。最后,基于该频域算法对室内声学回声抵消进行了模拟计算,可得到很好的回音抵消效果。

Acoustic echo cancellation （AEC） technologies are widely applied in all sorts of signal processing and communication systems. Based on analyzing and discussing the working principal of AEC, the revised optimal algorithms （FDAF MDFTP） and their characteristics, especially their effects on acoustic return loss enhancement are studied. Finally, the simulations to measure effect of frequency domain algorithms on indoor AEC are done, and the results are quite agreeable to the theoretical analysis.