Average secrecy capacity in FSO system over F-distribution channel considering the eavesdropper’s location

Hongyu Wu; Jing Ma; Sheng Jiang; Liying Tan; Qi Wang; Pengzhen Guo

doi:10.1117/12.2625804

27 March 2022 Average secrecy capacity in FSO system over F-distribution channel considering the eavesdropper’s location

Hongyu Wu, Jing Ma, Sheng Jiang, Liying Tan, Qi Wang, Pengzhen Guo

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169A1 (2022) https://doi.org/10.1117/12.2625804
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

When the beam waist radius of the receiver is significantly larger than that of the receiver, the free-space optical link is vulnerable to some optical capture risks in the physical layer. In this paper, we propose a new method to analyze the average secrecy capacity performance of the FSO system under Fisher-Snedecor (F)-distribution turbulence combined with the unified pointing error. As a key feature, we evaluate security performance in the presence of an external eavesdropper that exists anywhere on the same receiving plane as the receiver. Based on this model, we derive the exact average secrecy capacity expression and verify it by accurate Monte Carlo simulation. By using the expression, we analyze in detail the influence of the electrical signal-to-noise ratio of the main channel, the influence of different waist radius of the beam in the receiver plane on the average secrecy capacity performance under different turbulence conditions.

Citation Download Citation

Hongyu Wu, Jing Ma, Sheng Jiang, Liying Tan, Qi Wang, and Pengzhen Guo "Average secrecy capacity in FSO system over F-distribution channel considering the eavesdropper’s location", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169A1 (27 March 2022); https://doi.org/10.1117/12.2625804

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KEYWORDS

Turbulence

Free space optics

Receivers

Atmospheric turbulence

Signal attenuation

Systems modeling

Signal to noise ratio

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