一种变阶数自适应滤波算法

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 15-17,32.

一种变阶数自适应滤波算法

董航, 孙洪

武汉大学电子信息学院信号处理研究室, 湖北, 武汉, 430079

收稿日期:2007-08-28 修回日期:2007-11-15 出版日期:2009-01-20 发布日期:2010-01-03
作者简介:董航(1977- ),男,博士研究生,主要研究方向为语音信号处理.E-mail:donghang115@yahoo.com.cn
基金资助:
国家自然科学基金资助课题(60372057)

Adaptive filter based on coefficient order control and applied to acoustic echo cancellation

DONG Hang, SUN Hong

Signal Processing Lab, School of Electronic Information, Wuhan Univ., Wuhan 430079, China

Received:2007-08-28 Revised:2007-11-15 Online:2009-01-20 Published:2010-01-03

摘要/Abstract

摘要： 通过对回声抵消的实际应用环境进行分析,提出一种新的动态改变自适应滤波器阶数的算法。该算法在权系数的长度与失调误差信号之间建立一种非线性函数关系,具有在环境突变阶段,保持较高的滤波器阶数,而在稳态阶段自动减少阶数的特点,可以极大地降低自适应滤波器算法的运算量。理论分析和计算机仿真结果表明,该算法具有良好的收敛性能和跟踪性能,稳态误差的水平与传统算法保持一致。

Abstract: By analysing the actual room acoustic environments,this paper presents a novel algorithm for acoustic echo cancellation,it can dynamically change the length of the adaptive filter order.This algorithm builds a nonlinear function relationship between the length and the error signal.The filter keeps a long order when the environment changes suddenly,and the length would be shorter during the steady state.A significant reduction in the computational burden can be achieved by using the new method.Theoretical analysis and computer simulation prove that the convergence and tracking properties of this algorithm is as good as the former ones.

中图分类号:

TN911.72

董航, 孙洪. 一种变阶数自适应滤波算法[J]. Journal of Systems Engineering and Electronics, 2009, 31(1): 15-17,32.

DONG Hang, SUN Hong. Adaptive filter based on coefficient order control and applied to acoustic echo cancellation[J]. Journal of Systems Engineering and Electronics, 2009, 31(1): 15-17,32.

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