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

Haiguang Zhang, Xuan Tang, Bangjiang Lin, Zhenlei Zhou, Chun Lin, Sushank Chaudhary, Zabih Ghassemlooy, Zhaohui Li (Editor)

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)
102 Downloads (Pure)

Abstract

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.
Original languageEnglish
JournalProceedings of SPIE
Volume11048
DOIs
Publication statusPublished - 14 Feb 2019
Event17th International Conference on Optical Communications and Networks (ICOCN2018) - Zhuhai, China
Duration: 16 Nov 201819 Nov 2018

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