Antenna Selection in MIMO-NOMA Systems: A New Approach for Physical Layer Security Enhancement

Non-Orthogonal Multiple Access (NOMA) is known as a promising technology for next-generation wireless communication networks. In this paper, three low-complexity antenna selection schemes are proposed which aim to enhance the physical layer security (PLS) of a multiple-input multiple-output (MIMO) NOMA system. The system is composed of a single transmitter, multiple legitimate users, and one eavesdropper, all equipped with multiple antennas. The first scheme maximizes the secrecy sum-rate (SSR) of the system when the eavesdropper’s channel state information (CSI) is known, whereas the second scheme maximizes SSR in the absence of CSI. In the third scheme, the emphasis shifts towards fairness, aiming to maximize the minimum secrecy rate across all users. Numerical results demonstrate that the performance of the first two proposed schemes is very close to that of the optimal case, albeit with much lower computational complexity. It is also observed that the third scheme enhances fairness by balancing users’ secrecy rates, though with a moderate decrease in the overall secrecy sum-rate. Supplementary Material File (main.pdf) - Download - 126.11 KB Information & Authors Information Version history Peer review timeline Published Transactions on Emerging Telecommunications Technologies Version of Record20 May 2025Published Copyright This work is licensed under a Non Exclusive No Reuse License. Collection

Authors Metrics & Citations Metrics Article Usage 315views 206downloads Citations Download citation Ehsan Alemzadeh, Amir Masoud Rabiei. Antenna Selection in MIMO-NOMA Systems: A New Approach for Physical Layer Security Enhancement. Authorea. 25 November 2024. DOI: https://doi.org/10.22541/au.173251445.56233359/v1 DOI: https://doi.org/10.22541/au.173251445.56233359/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu.