Fast Converging Nonlinear Echo Cancellation Based On Optimum Step Size

被引:3
|
作者
Shih, Chia-Sheng [1 ]
Hsieh, Shih-Fu [1 ]
机构
[1] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 300, Taiwan
关键词
Adaptive filtering; Nonlinear Identification;
D O I
10.1109/ISSPIT.2009.5407533
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Adaptive Volterra filter is generally known to track nonlinear echo path at slow convergence rate. An optimum time- and tap- variant step-size for second-order Volterra filter is proposed to speed up its convergence rate. The step-size is derived based on the MMSE criterion. As the optimum step-size needs to know the real echo path coefficient, an exponential echo-path model is proposed for practical implementations. Computer simulations are provided to validate the proposed algorithms.
引用
收藏
页码:135 / 139
页数:5
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