改进仿射投影算法及其在电子回声消除中的应用

doi:10.3969/j.issn.0372-2112.2012.06.027

电子学报

改进仿射投影算法及其在电子回声消除中的应用

文昊翔, 陈隆道, 蔡忠法

浙江大学电气工程学院,浙江杭州 310027

收稿日期:2011-04-17 修回日期:2011-07-05 出版日期:2012-06-25
- 作者简介:
- 文昊翔 男,1984年4月出生于广东省韶关市,博士生,2008年毕业于浙江大学生物医学工程专业,同年获浙江大学本科学位,现就读于浙江大学电气工程学院,主要从事自适应滤波理论,电子、声学回声消除,有源消声研究. E-mail:xiangxiang_0@163.com

An Improved Affine Projection Algorithm and Its Application in Network Echo Cancellation

WEN Hao-xiang, CHEN Long-dao, CAI Zhong-fa

College of Electrical Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China

Received:2011-04-17 Revised:2011-07-05 Online:2012-06-25 Published:2012-06-25

摘要/Abstract

摘要： 在电子回声消除应用中,为提高自适应算法的收敛速度,提出一种改进的仿射投影算法及其快速实现形式.新算法利用回声路径的稀疏结构特征,通过收敛步长控制矩阵,按滤波器各系数幅值大小,等比例地为其指定相应收敛步长,以加快大系数收敛,最终达到加快滤波器整体收敛速度的目的.对新算法进行的统计学分析,为其快速收敛于目标系统的算法特性提供了理论依据.仿真实验表明与传统自适应算法相比,新算法能减小稳态失调并大幅提高收敛速度,其低计算复杂度亦保证了系统的实时性.

关键词: 电子回声消除, 稀疏性, 仿射投影算法, 等比例仿射投影算法

Abstract: An improved affine projection algorithm for network echo cancellation with its fast version is proposed to increase the convergence speed.On the basis of the sparse structure characteristic of network echo path,each coefficient of adaptive filter in the new algorithm obtains different step-size in proportion to its current absolute value,which leads to high overall convergence speed.Statistical analysis of the new algorithm provides theoretical basis for its outstanding capacity in converging to the objective system.The simulation result verifies that the new algorithm achieves faster convergence speed and lower final misalignment.In addition its low computational complexity satisfies the requirement of real-time system.

Key words: network echo cancellation, sparseness, affine projection algorithm, proportionate affine projection algorithm

中图分类号:

TM714

文昊翔, 陈隆道, 蔡忠法. 改进仿射投影算法及其在电子回声消除中的应用[J]. 电子学报, DOI: 10.3969/j.issn.0372-2112.2012.06.027.

WEN Hao-xiang, CHEN Long-dao, CAI Zhong-fa . An Improved Affine Projection Algorithm and Its Application in Network Echo Cancellation[J]. Acta Electronica Sinica, DOI: 10.3969/j.issn.0372-2112.2012.06.027.

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改进仿射投影算法及其在电子回声消除中的应用

An Improved Affine Projection Algorithm and Its Application in Network Echo Cancellation

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