Lasers, Fiber Optics, and Communications

Performance of free-space optical communication system using differential phase-shift keying subcarrier-intensity modulated over the exponentiated Weibull channel

[+] Author Affiliations
Zhengguang Gao, Hongzhan Liu, Renbo Liao

South China Normal University, Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510006, China

Xiaoping Ma

Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, Key Laboratory of Space Laser Communication and Testing Technology, Shanghai 201800, China

Opt. Eng. 54(10), 106109 (Oct 23, 2015). doi:10.1117/1.OE.54.10.106109
History: Received July 11, 2015; Accepted September 23, 2015
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Abstract.  A differential phase-shift keying modulation for free-space optical (FSO) communication is considered in atmospheric turbulence modeled by the exponentiated Weibull distribution. The selection combining (SelC) spatial diversity is used to mitigate the effects of atmospheric turbulence. We analyze the average bit error rate (BER) of the system using SelC spatial diversity by Gauss–Laguerre approximation. The effect of aperture averaging and spatial diversity on the outage probability is also studied. The numerical results show that it requires a smaller level of signal-to-noise ratio to reach the same BER when large aperture and SelC spatial diversity are deployed in the FSO system. Moreover, it is proved that aperture averaging and SelC spatial diversity are effective for improving the performance of the system’s outage probability.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Zhengguang Gao ; Hongzhan Liu ; Renbo Liao and Xiaoping Ma
"Performance of free-space optical communication system using differential phase-shift keying subcarrier-intensity modulated over the exponentiated Weibull channel", Opt. Eng. 54(10), 106109 (Oct 23, 2015). ; http://dx.doi.org/10.1117/1.OE.54.10.106109


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