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Secure Beamforming for IRS-Enhanced NOMA Networks

Wang, W; Cao, Y; Sheng, M; Tang, J; Zhao, N; Niyato, D; Wong, KK; (2022) Secure Beamforming for IRS-Enhanced NOMA Networks. IEEE Wireless Communications 10.1109/MWC.012.2100639. (In press). Green open access

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Owing to the increasing demand of higher spectrum efficiency and large-scale connectivity, non-orthogonal multiple access (NOMA) has become a highly competitive candidate for the upcoming sixth-generation (6G) systems. Nevertheless, the instable wireless propagation environment and potential wireless security risk become bottlenecks in applications of NOMA. Fortunately, intelligent reflecting surface (IRS) that can construct the three-dimensional beamforming and reconfigure the channels emerges as a highly efficient technology to break through the limitations of NOMA. Thus, in this article, we first present an overview of NOMA, and particularly illustrate its main shortcomings and security risks. Then, we introduce the IRS technology and provide further enhancement by applying IRS to NOMA networks. In addition, typical security threats in IRSNOMA networks are shown, followed by two countermeasures based on the joint transmit beamforming and IRS reflecting beamforming towards external and internal eavesdropping, respectively. Simulation results are carried out to demonstrate the feasibility and effectiveness of these two schemes. Several challenges and future directions are also discussed.

Type: Article
Title: Secure Beamforming for IRS-Enhanced NOMA Networks
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/MWC.012.2100639
Publisher version: https://doi.org/10.1109/MWC.012.2100639
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: NOMA , Array signal processing , Wireless communication , Security , Communication system security , Jamming , Eavesdropping
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
URI: https://discovery.ucl.ac.uk/id/eprint/10153220
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