Uplink secrecy performance of RIS-based RF/FSO three-dimension heterogeneous networks

Wang, D., Wu, M., Wei, Z., Yu, K., Min, L. and Mumtaz, S. ORCID: 0000-0001-6364-6149, 2023. Uplink secrecy performance of RIS-based RF/FSO three-dimension heterogeneous networks. IEEE Transactions on Wireless Communications. ISSN 1536-1276

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In this paper, a novel reconfigurable intelligent surface (RIS)-assisted HAP-UAV secure multi-user mixed radio frequency (RF)/free space optical (FSO) system is proposed. Specifically, the Gamma-Gamma distribution is utilized to characterize the atmospheric turbulence effect for the FSO link from UAV to HAP, while the Rayleigh and Nakagami- m distribution fading are applied to simulate the legitimate and wiretap RF links, respectively. We present the closed-form expressions for the probability density functions, the cumulative distribution functions, and the secrecy outage probability (SOP) of the end-to-end signal-to-noise ratio (SNR) in terms of Meijer’s G-function. To gain more insight into secrecy performance, we further obtain the closed-form expressions for the asymptotic SOP, the asymptotic probability of positive secrecy capacity (PPSC), the diversity gain, and the coding gain at high SNR regions. We can observe that the secrecy performance depends on the weaker channel between the RF and FSO, and is closely related to the number of RIS elements, the number of terrestrial users, the atmospheric turbulence factor, pointing error parameters, and the fading parameter of Nakagami- m distributed wiretap link. Finally, numerical results validate the derived results and demonstrate that the proposed design achieves superior secrecy performance over the benchmarks.

Item Type: Journal article
Publication Title: IEEE Transactions on Wireless Communications
Creators: Wang, D., Wu, M., Wei, Z., Yu, K., Min, L. and Mumtaz, S.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12 July 2023
ISSN: 1536-1276
Rights: © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Divisions: Schools > School of Science and Technology
Record created by: Laura Ward
Date Added: 14 Jul 2023 08:50
Last Modified: 14 Jul 2023 08:50
URI: https://irep.ntu.ac.uk/id/eprint/49360

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