Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel

Wasiu O. Popoola, Zabih Ghassemlooy , Joe Allen, Erich Leitgeb, Steven Gao

    Research output: Contribution to journalArticle

    Abstract

    An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which is assumed to obey log-normal distribution. Optimal but complex maximum ratio, equal gain combining (EGC) and relatively simple selection combining spatial diversity techniques in a clear atmosphere are considered. Each subcarrier is modulated using binary phase shift keying.
    Original languageEnglish
    Pages (from-to)16-23
    Number of pages8
    JournalIET Optoelectronics
    Volume2
    Issue number1
    DOIs
    Publication statusPublished - Feb 2008

    Keywords

    • optical communication system
    • spatial diversity
    • binary phase shift keying

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