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Analysis of secrecy outage performance for full duplex NOMA relay systems with appearance of multiple eavesdroppers

Cuong, N.L. and Hoang, T.M. and Phuong, N.T. and Hiep, P.T. (2022) Analysis of secrecy outage performance for full duplex NOMA relay systems with appearance of multiple eavesdroppers. Wireless Networks. ISSN 10220038

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Abstract

Full-duplex (FD) relay systems including a transmit antenna selection and a non-orthogonal multiple access (NOMA) methods are analyzed under presence of multiple eavesdroppers. A channel state information of both the considered system and eavesdroppers is assumed to be outdated and eavesdroppers eavesdrop information signals independently. A closed-form of secure outage probability (SOP), secrecy throughput of every user is derived to evaluate the secrecy performance, and the mathematical analysis approach is verified by the Monte-Carlo simulation. Furthermore, the Golden-Section Search algorithm is proposed to find the maximum of the secrecy throughput of the considered FD-NOMA system. Numerical results indicate that there exists the SOP floor in the considered system and it is constrained by the channel gain of near user. Moreover, there is the optimal signal to interference plus noise ratio value which minimizes the SOP of the system regardless of the number of eavesdroppers. In comparison with half-duplex NOMA model, the SOP of FD-NOMA model is better. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Item Type: Article
Divisions: Faculties > Faculty of Radio-Electronic Engineering
Identification Number: 10.1007/s11276-022-03024-7
Uncontrolled Keywords: Antennas; Finite difference method; Intelligent systems; Monte Carlo methods; Multiple access interference; Signal to noise ratio, Colluding eavesdroppers; Full-duplex; Full-duplex non-orthogonal multiple access relay system; Interference cancellation; Multiple access; Multiple non-colluding eavesdropper; Non-orthogonal; Relay system; Secrecy outage probabilities; Self interference cancelation; Self-interferences, Channel state information
URI: http://eprints.lqdtu.edu.vn/id/eprint/10488

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