New Neural Network Based Nonlinear and Multipath Distortion Equalizer for FTTA Systems (Special Issue on Mobile Computing)

    • IDO Jun
    • Information Technology R amp D Center, Mitsubishi Electric Co.
    • OKADA Minoru
    • Department of Communications Engineering, Faculty of Engineering, Osaka University
    • KOMAKI Shozo
    • Department of Communications Engineering, Faculty of Engineering, Osaka University

Abstract

A new Neural Network Equalizer (NNE), employing multilayer feedforward neural network, is proposed as a compensation method for nonlinear and multipath distortion that arises from FTTA (Fiber To The Air) system. If a signal in a channel is affected by nonlinear distortion, the conventional Decision Feedback Equalizer (DFE) finds difficulty in perfect compensation of it. To compensate for nonlinear distortion as well as multipath distortion, an equalizer, employing neural network, is investigated. A new neural network equalizer, yielding a cubic function as unit output function, is proposed in order to compensate the nonlinear distortion effectively. We also propose an initial weights of neural network for preventing from local minimum. Computer simulation results show that the compensation performance of the new NNE is superior to the conventional DFE and the conventional NNE.

Journal

IEICE transactions on communications   [List of Volumes]

IEICE transactions on communications E80-B(8), 1138-1144, 1997-08-25  [Table of Contents]

The Institute of Electronics, Information and Communication Engineers

References:  17

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Codes

  • NII Article ID (NAID) :
    110003217918
  • NII NACSIS-CAT ID (NCID) :
    AA10826261
  • Text Lang :
    ENG
  • Article Type :
    ART
  • ISSN :
    09168516
  • Databases :
    CJP  NII-ELS 

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