一种变步长解相关的自适应声回波对消算法  

A Decorrelating NLMS with Variable Step Size Algorithm for Acoustic Echo Cancellation

作　　者：李康辉[1] 何培宇[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《四川大学学报（自然科学版）》2003年第3期471-474,共4页Journal of Sichuan University(Natural Science Edition)

摘　　要：作者提出了一种变步长归一化解相关的LMS自适应滤波算法(简称μ(k) NDLMS算法).该算法综合了变步长自适应方法和归一化解相关方法的优点,将其用于声回波对消(AEC)中,在计算量增加很小的情况下,其收敛速度和稳态失配都较之自适应信号处理中常用的NLMS算法有所改善.作者通过计算机仿真,证实了这一结果.A decorrelating NLMS with variable step size algorithm (μ(k)NDLMS) is proposed. This algorithm incorporates the advantages of variable step size adaptive method (μ(k)) and those of decorrlating NLMS (NDLMS) method. As a result, the μ(k)NDLMS algorithm demonstrates, at little cost of computational load, a better performance both in convergence rate and steadystate misalignment than NLMS algorithm in acoustic echo cancellation. Computer simulation results confirm the effectiveness of this algorithm.

关 键 词：变步长 解相关方法 自适应声回波对消算法 语音信号处理 声回波对消器 声耦合 扬声器 麦克风 

分 类 号：TN912.3[电子电信—通信与信息系统]