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

I. E. Lee, Z. Ghassemlooy, W. P. Ng, M. Uysal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 (US)
Title of host publicationProceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012
DOIs
StatePublished - 2012
Event2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012 - Poznan, Poland
Duration: Jul 18 2012Jul 20 2012

Publication series

NameProceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012

Conference

Conference2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012
Country/TerritoryPoland
CityPoznan
Period7/18/127/20/12

Keywords

  • Free-space optical (FSO) communications
  • Gaussian-beam wave
  • atmospheric turbulence
  • average (ergodic) capacity
  • outage probability

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

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