An Optical CDMA System Based on Spectral Encoding of LED

D. Zaccarin, M. Kavehrad

    Research output: Contribution to journalArticlepeer-review

    172 Scopus citations


    In this letter we propose an optical code-division multiple access (CDMA) system based on amplitude spectral encoding of low-cost broadband sources such as light-emitting-diodes. The proposed system uses a standard nondispersive lens-grating apparatus, and simple direct-detection receivers. We show that by assigning to N subscribers the N cycles shifts of a single unipolar m-sequence of period N, complete orthogonality between the users can be achieved, provided that the spectrum is properly equalized. We show that without any equalization, and for N = 511, up to 200 users can transmit asynchronously with an average error probability equal to 10−9, depending on the received power level. An aggregate network throughput of 100 Gb/s can therefore be obtained.

    Original languageEnglish (US)
    Pages (from-to)479-482
    Number of pages4
    JournalIEEE Photonics Technology Letters
    Issue number4
    StatePublished - Apr 1993

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Electrical and Electronic Engineering


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