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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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.
| 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 |
| URI: | http://nrl.northumbria.ac.uk/id/eprint/38435 |
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