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BER and Outage Probability of DPSK Subcarrier Intensity Modulated Free Space Optics in Fully Developed Speckle

Wasiu O. Popoola1, Zabih Ghassemlooy1, and Erich Leitgeb2
1. Northumbria Communication Research Lab (NCRLab), Northumbria University, Newcastle upon Tyne, UK.
2. Institute of Broadband Communications, Graz University of Technology, Graz, Austria

Abstract--In this paper a differential phase shift keying (DPSK) subcarrier intensity modulated (SIM) free space optical (FSO) link is considered in negative exponential atmospheric turbulence environment. To mitigate the scintillation effect, the selection combining spatial diversity scheme (SelC) is employed at the receiver. Bit error rate (BER) and outage probability (Pout) analysis are presented with and without the SelC spatial diversity. It is shown that at a BER of 10-6, a maximum diversity gain 25 dB is predicted. And about 60 dBm signal power is required to achieve an outage probability of 10-6, based on a threshold BER of 10-4.

Index Terms—Free-space optics, DPSK, turbulence, spatial diversity, negative exponential distribution, outage probability.

 

Cite:Wasiu O. Popoola, Zabih Ghassemlooy and Erich Leitgeb, "BER and Outage Probability of DPSK Subcarrier Intensity Modulated Free Space Optics in Fully Developed Speckle," Journal of Communications, vol. 4, no.8, pp.546-554, 2009
 

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