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Optical Engineering

Performance of free-space optical communication system using differential phase-shift keying subcarrier-intensity modulated over the exponentiated Weibull channel
Author(s): Zhengguang Gao; Hongzhan Liu; Renbo Liao; Xiaoping Ma
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Paper 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.

Paper Details

Date Published: 23 October 2015
PDF: 8 pages
Opt. Eng. 54(10) 106109 doi: 10.1117/1.OE.54.10.106109
Published in: Optical Engineering Volume 54, Issue 10
Show Author Affiliations
Zhengguang Gao, South China Normal Univ. (China)
Hongzhan Liu, South China Normal Univ. (China)
Renbo Liao, South China Normal Univ. (China)
Xiaoping Ma, Shanghai Institute of Optics and Fine Mechanics (China)

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