Performance analysis of FSO system with different modulation schemes over gamma-gamma turbulence channel

Zhang, Haiguang, Tang, Xuan, Lin, Bangjiang, Zhou, Zhenlei, Lin, Chun, Chaudhary, Sushank, Ghassemlooy, Zabih and Li, Zhaohui (2019) Performance analysis of FSO system with different modulation schemes over gamma-gamma turbulence channel. Proceedings of SPIE, 11048. ISSN 0277-786X

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Free-space optical communications (FSO) suffers from irradiance fluctuation caused by atmospheric turbulence, which results in optical power loss and consequently decreased signal-to-noise ratio (SNR). The error performances of the FSO based on On-Off Keying (OOK), Differential Phase Shift Keying (DPSK), and Binary Phase Shift Keying (BPSK) schemes in a turbulent atmosphere are presented. The received irradiance after propagating the atmosphere is modeled using the gamma-gamma distribution to evaluate the system error performance in turbulence regimes from weak to strong. The results show that, to obtain a BER of 10-6 at weak turbulence regime, ~15 dB and ~18 dB SNRs are required for BPSK and DPSK, respectively. However, for OOK with a fixed threshold of 0.5 under the same channel condition, OOK reaches an error floor greater than 10-3. The values of SNR required to achieve the same BER increase as the turbulence strength increase to moderate and strong regimes.

Item Type: Article
Additional Information: Copyright notice format: Copyright 2019 (year) Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Subjects: F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 19 Mar 2019 12:00
Last Modified: 01 Aug 2021 11:53

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