Comprehensive Physical Layer Security Analysis of FSO Communications Over Malaga Channels

被引:42
作者
Ai, Yun [1 ]
Mathur, Aashish [2 ]
Verma, Gyan Deep [2 ]
Kong, Long [3 ]
Cheffena, Michael [1 ]
机构
[1] Norwegian Univ Sci & Technol, Fac Engn, N-2815 Gjovik, Norway
[2] Indian Inst Technol Jodhpur, Dept Elect Engn, Jodhpur 342037, Rajasthan, India
[3] Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust, L-1855 Luxembourg, Luxembourg
来源
IEEE PHOTONICS JOURNAL | 2020年 / 12卷 / 06期
关键词
Average secrecy capacity; free-space optical (FSO) communications; Malaga (M)-distribution; physical layer security; secrecy outage probability; SECRECY OUTAGE ANALYSIS; TRANSMISSION; PERFORMANCE; ALPHA; CAPACITY;
D O I
10.1109/JPHOT.2020.3036244
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this article, we study the physical layer security of free-space optical (FSO) communications under different eavesdropping scenarios. More specifically, the secrecy performance of FSO communication employing intensity modulation/direct detection detection is analyzed for the well-established Malaga channels. Three different realistic scenarios of eavesdropping are considered by assuming different placement locations for the eavesdropper in the paper. Novel expressions for the average secrecy capacity (ASC) and secrecy outage probability (SOP) are derived for the considered scenarios, and useful insights are also provided through asymptotic analysis. The results show: (1) When the eavesdropper is placed near the transmitter, atmospheric condition imposes a less significant impact on secrecy performance; (2) Certain level of correlation can potentially enhance the secrecy performance for FSO communications; (3) The correlation imposes opposite impacts on the ASC and SOP of FSO communications; and the secrecy performance metrics exhibit a non-monotonic impact with the increase of correlation; (5) When the correlation of the FSO links is too small or too large (i.e., the correlation parameter around 0 or 1), the correlation plays a more significant impact on secrecy performance; and (6) The asymptotic slope of the SOP is 0.5 for all eavesdropping scenarios under practical FSO channels.
引用
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页数:18
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