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基于梯度向量投影的自适应滤波算法的改进及其在多路回波消除中的应用

周元建 谢胜利

周元建, 谢胜利. 基于梯度向量投影的自适应滤波算法的改进及其在多路回波消除中的应用[J]. 电子与信息学报, 2004, 26(4): 568-573.
引用本文: 周元建, 谢胜利. 基于梯度向量投影的自适应滤波算法的改进及其在多路回波消除中的应用[J]. 电子与信息学报, 2004, 26(4): 568-573.
Zhou Yuan-jian, Xie Sheng-li. An Improved Adaptive Filtering Algorithm Based on Projection of Gradient Vectors and Its Application in Multi-channel Acoustic Echo Cancellation[J]. Journal of Electronics & Information Technology, 2004, 26(4): 568-573.
Citation: Zhou Yuan-jian, Xie Sheng-li. An Improved Adaptive Filtering Algorithm Based on Projection of Gradient Vectors and Its Application in Multi-channel Acoustic Echo Cancellation[J]. Journal of Electronics & Information Technology, 2004, 26(4): 568-573.

基于梯度向量投影的自适应滤波算法的改进及其在多路回波消除中的应用

An Improved Adaptive Filtering Algorithm Based on Projection of Gradient Vectors and Its Application in Multi-channel Acoustic Echo Cancellation

  • 摘要: 该文首先对Lim(2000)的基于梯度向量正交投影的算法(OGA)进行了分析和改进,在此基础上获得了一种新的自适应滤波算法(MOGA)。新算法使用时变遗忘因子对误差进行指数加权平均来估计均方误差,并使用该因子改变自适应迭代过程中滤波器系数向量的更新方向.然后将改进后的新算法扩展成两路回波消除算法用于多路回波的消除中,获得了良好的效果。仿真结果表明, MOGA不仅对时变或时不变系统具有很好的跟踪能力,克服了Lim(2000)所提算法收敛性不佳甚至有时发散的缺陷,而且应用于多路回波消除时具有计算量小,收敛速度快和精度高等特点,其收敛速度和精度优于J.Benesty(1996)和G.Sankaran(1999)的相应结果。
  • Widrow B, Stearns S D. Adaptive Signal Processing, Englewood Cliffs, NJ: Prentice-Hall, 1985:98-116.[2]Haykin S. Adaptive Filter Theory. 3rd Editon, Englewood Cliffs, NJ: Prentice-Hall, 1996: 432-437.[3]Ozeki K, Umeda T. An adaptive filtering algorithm using an orthogonal projection to an affine subspace and its properties. Electronics and Communications in Japan, 1984, 67-A(5): 19-27.[4]Proakis J G. Channel identification for high speed digital communications. IEEE Trans. on Automat. Contl., 1974, AC-19(6): 916-922.[5]Lim J S. Fast adaptive filtering algorithm based on exponentially weighted least-square errors.Electron. Left., 1999, 35(22): 1913-1915.[6]Lim J S. New adaptive filtering algorithms based on an orthogonal projection of gradient vectors[J].IEEE Signal Processing Letters.2000, 7(11):314-317[7]周元建,谢胜利.带有旋转因子的多路回波消除自适应滤波算法.电子学报,2001,29(10):1360-1363.[8]Benesty J, Duhamel P, Grenier Y. A multi-channel affine projection algorithm with applications to multi-channel acoustic echo cancellation[J].IEEE Signal Processing Left.1996, 3(2):35-37[9]Sankaran S G. Stereophonic acoustic echo cancellation using NLMS with orthogonal correction factors [A]. in Proceedings of the 1999 International Workshop on Acoustic Echo and Noise Control (IWAENC) [C], Procaine Manor, 1999: 40-43.[10]Tangsangiumvisai N, Chambers J A, Constantinides A G. Higher-order time-varying allpass filters for signal decorrelation in stereophonic acoustic echo cancellation. Electron. Left., 1999, 35(1):88-90.
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出版历程
  • 收稿日期:  2002-12-03
  • 修回日期:  2003-06-03
  • 刊出日期:  2004-04-19

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