Performance Analysis of Multi-Hop FSOC over Gamma-Gamma Turbulence and Random Fog with Generalized Pointing Errors

被引:2
作者
Chang, Yidi [1 ]
Liu, Zhi [1 ,2 ]
Yao, Haifeng [3 ]
Gao, Shiming [4 ]
Dong, Keyan [2 ]
Liu, Shutong [1 ]
机构
[1] Changchun Univ Sci & Technol, Sch Elect & Informat Engn, Changchun 130022, Peoples R China
[2] Changchun Univ Sci & Technol, Natl & Local Joint Engn Res Ctr Space Optoelect Te, Changchun 130022, Peoples R China
[3] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China
[4] Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China
基金
中国国家自然科学基金;
关键词
free-space optical communication; multi hop; fog; atmospheric turbulence; generalized pointing error; outage probability; PROBABILITY DENSITY-FUNCTION; SPACE OPTICAL COMMUNICATIONS; CHANNELS; SYSTEM; LINK; COMMUNICATION; MODEL; BEAM; SIZE;
D O I
10.3390/photonics10111240
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The multi-hop amplify-and-forward free-space optical communication (FSOC) system is studied in random fog using the I-function, considering Gamma-Gamma atmospheric turbulence and Beckmann pointing error. Outage probability, average bit error rate and average ergodic channel capacity are obtained. Channel-state-information assisted relay performs better than fixed-gain relay under high transmitted power. Increasing the hop number significantly improves the performance. More hops are needed in medium fog than in light fog to achieve the same performance. In addition, on a single-hop link, the influence of fog channel on system performance is dominant, while atmospheric turbulence intensity, normalized jitter standard deviation and normalized boresight error have little effect on the system performance. However, on a multi-hop link, atmospheric turbulence intensity, normalized jitter standard deviation and normalized boresight error have serious effects on system performance. Compared with correcting the normalized boresight error, compensating the normalized jitter standard deviation greatly improves the multi-hop FSOC system performance. Furthermore, optimizing beam width can further improves the performance. To ensure good communication, the system should select a low-order modulation scheme.
引用
收藏
页数:22
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