Approximate derivation of average bit error rate in DS-CDMA systems in a frequency-selective Rayleigh fading environment

Fumihito Sasamori, Fumiaki Maehara, Fumio Takahata

    Research output: Contribution to journalArticle

    Abstract

    The transmission quality of mobile radio communications is strongly affected by fading with rapid fluctuations in the envelope and phase of the received signal, in addition to the effect of thermal noise. This paper considers a multiple access system (DS-CDMA system) using the spread spectrum technique with direct spread, and presents a method of deriving the approximate average bit error rate in a frequency-selective fading environment (the n-ray Rayleigh fading model), with the maximum Doppler frequency, the delay time of the delayed wave, and the number of stations simultaneously utilizing the channel as parameters. The two-wave model and the IMT2000 model are considered as examples, and the validity of the proposed method is demonstrated by the fact that the results obtained by the approximate formula agree well with the simulation results even if the parameters are varied.

    Original languageEnglish
    Pages (from-to)90-99
    Number of pages10
    JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Volume87
    Issue number1
    DOIs
    Publication statusPublished - 2004 Jan

    Fingerprint

    Frequency selective fading
    Rayleigh fading
    Bit error rate
    Code division multiple access
    Fading (radio)
    Thermal noise
    Radio communication
    Time delay

    Keywords

    • Bit error rate
    • DS-CDMA
    • Frequency-selective fading
    • Maximum doppler frequency
    • Mobile radio communications
    • Rayleigh fading

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Networks and Communications

    Cite this

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    abstract = "The transmission quality of mobile radio communications is strongly affected by fading with rapid fluctuations in the envelope and phase of the received signal, in addition to the effect of thermal noise. This paper considers a multiple access system (DS-CDMA system) using the spread spectrum technique with direct spread, and presents a method of deriving the approximate average bit error rate in a frequency-selective fading environment (the n-ray Rayleigh fading model), with the maximum Doppler frequency, the delay time of the delayed wave, and the number of stations simultaneously utilizing the channel as parameters. The two-wave model and the IMT2000 model are considered as examples, and the validity of the proposed method is demonstrated by the fact that the results obtained by the approximate formula agree well with the simulation results even if the parameters are varied.",
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    author = "Fumihito Sasamori and Fumiaki Maehara and Fumio Takahata",
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