Performance analysis of free space optical links over turbulence and misalignment induced fading channels

It Ee Lee, Zabih Ghassemlooy, Wai Pang Ng, Murat Uysal

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

35 Citations (Scopus)

Abstract

The performance of free-space optical (FSO) communication system is investigated from the information theory perspective, under the influence of atmospheric loss and channel fading due to the turbulence and pointing error. The outage probability and average channel capacity of the FSO link are evaluated using a combined slow-fading channel model and a Gaussian beam wave model, unlike the limiting Rytov-based scintillation model considered in earlier work. Taking into account various link design criteria, our study reveals that lower outage probability can be achieved with larger receiver aperture due to the aperture averaging effect. Optimization of the capacity metrics is best performed through proper selection of the aperture size and beam width for known laser wavelength, particularly for long-distance links and strong turbulence scenarios. Hence, findings and results from our analysis can be treated as the design benchmark for optimal planning and deployment of optical links.
Original languageEnglish
Title of host publicationProceedings of the 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP)
Place of PublicationPiscataway, NJ
PublisherIEEE
ISBN (Print)978-1457714726
Publication statusPublished - 2012
Event8th IEEE IET International Symposium on Communication Systems, Networks and Digital Signal Processing - Poznan Poland
Duration: 1 Jan 2012 → …

Conference

Conference8th IEEE IET International Symposium on Communication Systems, Networks and Digital Signal Processing
Period1/01/12 → …

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