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 canceller can be regarded as a horizontal adaptive filter, acoustic echo cancellation technology in the modern signal processing has been more and more widely used. After discussing the basic principles of acoustic echo cancellation, a simplified adaptive frequency domain acoustic echo cancellation FDAF-MDFTP algorithm is proposed. The characteristics of the proposed algorithm and the impact of acoustic echo return loss increase degree are analyzed. Finally, based on the frequency-domain algorithm, the acoustic echo cancellation in the room is simulated and a good echo cancellation effect is obtained.