Reconstruction of chaotic signals with application to channel equalization in chaos-based communication systems

Jiuchao Feng, Chi Kong Tse, Chung Ming Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

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 Hénon map and Chua's circuit are used to generate chaotic signals. It is shown that the proposed RNN-based equalizer outperforms conventional equalizers as well as those based on feedforward neural networks for noisy, distorted linear and non-linear channels.
Original languageEnglish
Pages (from-to)217-232
Number of pages16
JournalInternational Journal of Communication Systems
Volume17
Issue number3
DOIs
Publication statusPublished - 1 Apr 2004

Keywords

  • Channel equalization
  • Chaos
  • Communications
  • Recurrent neural networks

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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