DocumentCode :
3217082
Title :
Performance analysis of free space optical links over turbulence and misalignment induced fading channels
Author :
Lee, I.E. ; Ghassemlooy, Z. ; Ng, W.P. ; Uysal, M.
Author_Institution :
Opt. Commun. Res. Group, Northumbria Univ., Newcastle upon Tyne, UK
fYear :
2012
fDate :
18-20 July 2012
Firstpage :
1
Lastpage :
6
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.
Keywords :
atmospheric turbulence; channel capacity; fading channels; optical links; probability; FSO communication system; Gaussian beam wave model; Rytov-based scintillation model; atmospheric loss; atmospheric turbulence; average channel capacity; combined slow-fading channel model; free space optical links; information theory; laser wavelength; link design criteria; misalignment induced fading channels; outage probability; pointing error; Adaptive optics; Atmospheric modeling; Fading; Laser beams; Optical fiber communication; Optical receivers; Optical transmitters; Free-space optical (FSO) communications; Gaussian-beam wave; atmospheric turbulence; average (ergodic) capacity; outage probability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012 8th International Symposium on
Conference_Location :
Poznan
Print_ISBN :
978-1-4577-1472-6
Type :
conf
DOI :
10.1109/CSNDSP.2012.6292668
Filename :
6292668
Link To Document :
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