Article
Performance analysis of MIMO freespace optical systems in gammagamma fading.
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
IEEE Transactions on Communications (Impact Factor: 1.75). 01/2009; 57:34153424. DOI: 10.1109/TCOMM.2009.11.080168 Source: IEEE Xplore

Conference Paper: Calculation of the Impact of Atmospheric Turbulence Conditions on Free Space Optical Communication Links Using GammaGamma Model
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ABSTRACT: Free Space Optical (FSO) communication is a low cost and license free high bandwidth access technique, is a primary research area from last few years. Atmospheric turbulence plays a vital role in degrading the link performance. This paper presents the model study on the effects of atmospheric turbulence in FSO links. The study is based on the most popular gammagamma model distribution. The theoretical model is simulated by varying the height of link and the results are plotted in Mathworks® MATLAB®. The research demonstrates that the effects of turbulence depend primarily on wind speed and height of established FSO link. After varying the height of link, the effects of atmospheric turbulence on link performance can be clearly seen. The result also plotted for the attenuation of signal with varying visibility range conditions.Proceedings of the Fourth IEEE International Conference on Computing, Communication and Networking Technologies, Tiruchingode, TN; 07/2013 
Conference Paper: Outage performance of MIMO freespace optical systems in gammagamma fading channels
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ABSTRACT: In this paper, we consider a MIMO FreeSpace Optical (FSO) communication system over gammagamma turbulence channels and derive a closedform analytical expression for the outage probability taking into account the effects of both the inner scale size of optical channel and the aperture averaging. Our results demonstrate that by increasing the number of transmit and/or receive apertures, the degrading effect of the inner scale size is effectively reduced by extracting the spatial diversity gain of the MIMO scheme.We further provide Monte Carlo simulation results to confirm the validity of the derived expression.18th European Conference on Network and Optical Communications & 8th Conference on Optical Cabling and Infrastructure  NOC/OC&I 2013, Graz, Austria; 07/2013 
Article: Coherent Polarization Modulated Transmission through MIMO Atmospheric Optical Turbulence Channel
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ABSTRACT: An optical signal suffers from irradiance and phase fluctuations when propagating through the free space optical (FSO) turbulence channel, thus resulting in the degradation of the bit error rate (BER) performance. The BER performance can be improved by adopting the multipleinput multipleoutput (MIMO) scheme. In this paper, we propose a coherent binary polarization shift keying (BPOLSK) modulation scheme with MIMO employing maximum ratio combining and equal gain combining diversity techniques to mitigate the turbulence effect. The gamma–gamma statistical channel model is adopted for all the turbulence regimes. The BER performance for the proposed BPOLSKMIMO FSO link is compared with the singleinput singleoutput and ON–OFFkeying systems by means of computer simulation. The optical power gain is investigated and demonstrated under different turbulence regimes for a number of transmitters/receivers.Journal of Lightwave Technology 10/2013; 31(20):32213228. · 2.56 Impact Factor
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