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Channel Equalization for Chaos-Based Communication Systems

Jiu-chao FENG, Chi Kong TSE, Francis C. M. LAU

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Summary :

A number of schemes have been proposed for communication using chaos over the past years. Regardless of the exact modulation method used, the transmitted signal must go through a physical channel which undesirably introduces distortion to the signal and adds noise to it. The problem is particularly serious when coherent-based demodulation is used because the necessary process of chaos synchronization is difficult to implement in practice. This paper addresses the channel distortion problem and proposes a technique for channel equalization in chaos-based communication systems. The proposed equalization is realized by a modified recurrent neural network (RNN) incorporating a specific training (equalizing) algorithm. Computer simulations are used to demonstrate the performance of the proposed equalizer in chaos-based communication systems. The Henon map and Chua's circuit are used to generate chaotic signals. It is shown that the proposed RNN-based equalizer outperforms conventional equalizers.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E85-A No.9 pp.2015-2024
Publication Date
2002/09/01
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Section on Nonlinear Theory and Its Applications)
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