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Open Access | Just Accepted

Physical Layer Security for CR-NOMA Network with Cooperative Jamming

Meiling Li1( )Peng Xue1Hu Yuan2Yuxing Han3

1 School of Electronics Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

2 School of Computer Science and Mathematics, Kingston University, London, KT1 2EE, UK

3 Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China

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Abstract

Cooperative jamming can effectively combat eavesdropping in physical layer security communication without affecting the legal receiver and improve the security performance of the system. This paper introduces cooperative jamming to cognitive radio (CR) networks with non-orthogonal multiple access (NOMA) technology. The secure performance of the considered CR and NOMA (CR-NOMA) network is evaluated using two modes: non-cooperative jamming and cooperative jamming. In particular, the secrecy outage probabilities (SOPs) of the primary user (PU) in the two modes are derived under Rician fading channels, based on which, the influences of the transmission signal-to-noise ratio (SNR) of secondary users (SUs), the number of SUs, the secrecy rate, and the power allocation coefficient on the SOPs of PU are analyzed thereafter. Both analysis and simulation results show that cooperative jamming effectively prevents eavesdropping behaviour, which reduces the SOP of PU compared to non-cooperative jamming. We also show that the transmission SNR, the number of SUs, the secrecy rate, and the power distribution coefficients greatly influence performance improvement.

Tsinghua Science and Technology
Cite this article:
Li M, Xue P, Yuan H, et al. Physical Layer Security for CR-NOMA Network with Cooperative Jamming. Tsinghua Science and Technology, 2024, https://doi.org/10.26599/TST.2023.9010128

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Received: 18 July 2023
Revised: 27 October 2023
Accepted: 29 October 2023
Available online: 17 May 2024

© The author(s) 2025.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).

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