1st International ICST Workshop on Physics Inspired Paradigms for Wireless Communications and Network

Research Article

Interference Reduction in CDMA Channels: A Statistical-Mechanics Approach

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  • @INPROCEEDINGS{10.4108/ICST.WIOPT2008.3211,
        author={Toshiyuki Tanaka and Kouichiro Kitagawa},
        title={Interference Reduction in CDMA Channels: A Statistical-Mechanics Approach},
        proceedings={1st International ICST Workshop on Physics Inspired Paradigms for Wireless Communications and Network},
        publisher={IEEE},
        proceedings_a={PHYSCOMNET},
        year={2008},
        month={8},
        keywords={AWGN Communication systems Electromagnetic scattering Femtocell networks Interference Mathematical model Mobile communication Multiaccess communication Vectors Wireless communication},
        doi={10.4108/ICST.WIOPT2008.3211}
    }
    
  • Toshiyuki Tanaka
    Kouichiro Kitagawa
    Year: 2008
    Interference Reduction in CDMA Channels: A Statistical-Mechanics Approach
    PHYSCOMNET
    IEEE
    DOI: 10.4108/ICST.WIOPT2008.3211
Toshiyuki Tanaka1,*, Kouichiro Kitagawa1,*
  • 1: Graduate School of Informatics, Kyoto University, 36-1 Yoshida Hon-machi, Sakyo-ku, Kyoto-shi, Kyoto 606-8501, Japan.
*Contact email: tt@i.kyoto-u.ac.jp, kitagawa@sys.i.kyoto-u.ac.jp

Abstract

Statistical mechanics-based approach to studying wireless communication systems is useful not only in analyzing theoretical performance of a given model, but also in optimizing design of a class of system models. In this paper, we demonstrate usefulness of statistical-mechanics approach in the problem of optimizing a spreading sequence set of randomly-spread code-division multiple-access (CDMA) communication systems. It has been shown that the optimal spreading sequences of a randomly spread CDMA channel in the large-system limit are Welch-bound-equality sequence sets, even when a non-Gaussian input distribution is assumed.