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Volume 30 Issue 1
Jan.  2011
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Yang Bo, Feng Jiu-chao. An Improved Adaptive Filtering Algorithmand Its Application to Chaotic Echo Cancellation[J]. Journal of Electronics & Information Technology, 2008, 30(1): 121-124. doi: 10.3724/SP.J.1146.2006.00634
Citation: Yang Bo, Feng Jiu-chao. An Improved Adaptive Filtering Algorithmand Its Application to Chaotic Echo Cancellation[J]. Journal of Electronics & Information Technology, 2008, 30(1): 121-124. doi: 10.3724/SP.J.1146.2006.00634

An Improved Adaptive Filtering Algorithmand Its Application to Chaotic Echo Cancellation

doi: 10.3724/SP.J.1146.2006.00634
  • Received Date: 2006-05-11
  • Rev Recd Date: 2007-07-25
  • Publish Date: 2008-01-19
  • An improved adaptive filtering algorithm is proposed in this paper, and the convergence of the algorithm is analyzed. As an example, the new algorithm is used to cancel echo for the chaotic modulation communication systems experiencing echo channels. The results by computer simulation indicate that the improved algorithm has faster convergence speed and higher accuracy of computation. In addition, the new algorithm is steadier in the case of low SNR.
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  • [1] Sondhi M, Morgan D R, and Hall J L. Stereophonic acoustic echo cancellation: A overview of the fundamental problem[J].IEEE Signal Processing Letters.1996, 2(8):148-151 [2] Yann J and Akihiko S. A stereo echo canceler with preprocessing for correct echo-path identification. Proc. ICASSP, Seattle, USA, 1998: 3677-3680. Murtaza A. Stereophonic acoustic echo cancellation system using time-varying all pass filtering for signal decorrelation. Proc. ICASSP, Seattle, USA, 1998: 3689-3692. [3] Andreas M and Jaafar M H E. Blind channel estimation and echo cancellation using chaotic coded signals[J].IEEE Comm.Letters.1999, 3(3):72-74 [4] Jaafar M H E, Milner S H, and Cryan R A. Experimental evaluation of echo path modeling with chaotic coded speech[J].IEEE Trans. on Signal Processing.1997, 45(10):2600-2604 [5] Andrew I H and Danilo P M. Nonlinear FIR adaptive filters with a gradient adaptive amplitude in the non-Linearity[J].IEEE Signal Processing Letter.2002, 9(8):253-255 [6] Haykin S. Adaptive Filter Theory (Third Edition). New Jersey, Prentice Hall, 1996, Chapter 4. [7] 阎平凡, 黄端旭. 人工神经网络-模型 分析与应用. 安徽教育出版社, 1993, 第三章. [8] Henry L. System identification using chaos with application to equalization of a chaotic modulation system[J].IEEE Trans. on Circuits and Systems-I.1998, 45(3):314-320 [9] Feng J C and Tse C K. On-line adaptive chaotic demodulator based on radial-basis-function neural networks. Physical Review E, 2001, 63(2), 026202: 1-10.
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