带有旋转因子的多路回波消除自适应滤波算法

A Adaptive Filtering Algorithm with Rotating Factor for Multi-Channel Echo Cancellation

本文提出一种带有旋转因子的归一化多路回波消除算法NLMS RF ,并对算法进行了分析和几何解释 .进一步地 ,我们将所提算法扩展成一种带有旋转因子的多路回波消除仿射算法APA RF .NLMS RF算法的计算量远小于Sankaran(1999)所提的多路回波消除算法 ,而APA RF的计算量与Benesty(1996 )所提出的算法的计算量相当 .在收敛精度和速度上 ,NLMS RF和APA RF分别较Sankaran(1999)和Benesty(1996 )所提算法有较大的改善 .

A Normal Least Mean Square adaptive filtering algorithm with rotating factor (NLMS RF) is proposed and its performance and geometry property is analyzed in this paper.Furthermore,it is extend to a multi channel Affine Projection Algorithm with rotating factor (APA RF) for stereophonic echo cancellation.The computational complexity of the NLMS RF is much lower than that of Sankaran's (1999),and the computational complexity of the APA RF is as much as that of Benesty's (1996).As compared with Benesty's (1996) and Sankaran's (1999),the NLMS RF and APA RF is of faster convergence and more accuracy respectively.The simulation in MATLAB indicates its efficiency.