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Volume 31 Issue 4
Dec.  2010
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Zhang Yin-bing, Zhao Jun-wei, Li Jin-ming, Sun Yong. Decision Feedback Blind Equalization Algorithm Based on RENYI Entropy for Underwater Acoustic Channels[J]. Journal of Electronics & Information Technology, 2009, 31(4): 911-915. doi: 10.3724/SP.J.1146.2008.00056
Citation: Zhang Yin-bing, Zhao Jun-wei, Li Jin-ming, Sun Yong. Decision Feedback Blind Equalization Algorithm Based on RENYI Entropy for Underwater Acoustic Channels[J]. Journal of Electronics & Information Technology, 2009, 31(4): 911-915. doi: 10.3724/SP.J.1146.2008.00056

Decision Feedback Blind Equalization Algorithm Based on RENYI Entropy for Underwater Acoustic Channels

doi: 10.3724/SP.J.1146.2008.00056
  • Received Date: 2008-01-11
  • Rev Recd Date: 2008-06-23
  • Publish Date: 2009-04-19
  • In order to depress the severe Inter-Symbol Interference (ISI) caused by multi-path fading, channels must be equalized in underwater communication systems. To enhance the convergence ability of the traditional Constant Modulus Algorithm with Decision Feedback Equalization (CMA-DFE), a decision feedback blind equalization algorithm based on RENYI entropy is proposed in this paper. The proposed algorithm adjusts the forward equalizer coefficients with RENYI entropy algorithm and the backward equalizer coefficients with CMA algorithm. Compared with CMA-DFE, RENYI-DFE algorithm has accelerated the convergence speed of the blind equalizer with only little computational cost. The performance of the algorithm is validated by computer simulations.
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