Physical layer security of HAPS-based space-air-ground-integrated network with hybrid FSO/RF communication

Physical layer security of HAPS-based space-air-ground-integrated network with hybrid FSO/RF communication

In this article, we study the physical layer security performance of a downlink space-air-ground-integrated network (SAGIN), where a satellite communicates with the ground user/destination via a high-altitude-platform-station-based relay in the presence of an eavesdropper. In particular, we propose...

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Bibliographic Details
Main Authors: Bankey, Vinay, Sharma, Shubha, Swaminathan, R., Madhukumar, A. S.
Other Authors: School of Computer Science and Engineering
Format: Article
Language:English
Published: 2023
Subjects:
Engineering::Computer science and engineering
Gamma-Gamma Distribution
Physical Layer Security
Online Access:https://hdl.handle.net/10356/170679
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Institution: Nanyang Technological University
Language: English
Description
Summary:In this article, we study the physical layer security performance of a downlink space-air-ground-integrated network (SAGIN), where a satellite communicates with the ground user/destination via a high-altitude-platform-station-based relay in the presence of an eavesdropper. In particular, we propose to use hybrid free-space optical (FSO)/radio frequency (RF) transmission to enhance the security of the considered system. Herein, the FSO and RF links are assumed to experience Gamma-Gamma and Shadowed-Rician distributions, respectively. Specifically, we derive exact and asymptotic expressions of secrecy outage probability for the considered SAGIN by employing intensity modulation/direct detection. We provide the numerical and simulation results to validate our analysis.

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