Derivation of average bit-error rate in direct-sequence spread-spectrum communications

Masafumi Usuda*, Tohru Kikuta, Fumio Takahata

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    The Gaussian approximation is widely used as a simple method of derivation for the average bit-error rate in direct-sequence spread-spectrum communications. The Gaussian approximation cannot always derive the bit-error rate with high accuracy since the accuracy tends to be degraded with the increase of Eb/N0 when the number of interference symbols is low. This article proposes a method of theoretical analysis in which the probability density function for the composite amplitude of the interference signal is derived by faithfully following the signal processing executed in the spread-spectrum communication system, after which the bit-error rate is derived. The validity of the method is demonstrated by verifying that the bit-error rate obtained by the proposed method agrees well with the value obtained by computer simulation.

    Original languageEnglish
    Pages (from-to)57-64
    Number of pages8
    JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Issue number5
    Publication statusPublished - 2000


    • Band-limiting
    • Bit-error rate
    • Direct sequence spreading
    • Probability density function
    • Spread-spectrum communications

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Electrical and Electronic Engineering


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