On secure NOMA systems with transmit antenna selection schemes

Lei, H., Zhang, J., Park, K.-H., Xu, P., Ansari, I. S. , Pan, G., Alomair, B. and Alouini, M.-S. (2017) On secure NOMA systems with transmit antenna selection schemes. IEEE Access, 5, pp. 17450-17464. (doi: 10.1109/ACCESS.2017.2737330)

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This paper investigates the secrecy performance of a two-user downlink non-orthogonal multiple access systems. Both single-input and single-output and multiple-input and single-output systems with different transmit antenna selection (TAS) strategies are considered. Depending on whether the base station has the global channel state information of both the main and wiretap channels, the exact closed-form expressions for the secrecy outage probability (SOP) with suboptimal antenna selection and optimal antenna selection schemes are obtained and compared with the traditional space-time transmission scheme. To obtain further insights, the asymptotic analysis of the SOP in high average channel power gains regime is presented and it is found that the secrecy diversity order for all the TAS schemes with fixed power allocation is zero. Furthermore, an effective power allocation scheme is proposed to obtain the non-zero diversity order with all the TAS schemes. Monte Carlo simulations are performed to verify the proposed analytical results.

Item Type:Articles
Additional Information:This work was supported in part by the National Natural Science Foundation of China under Grant 61471076, in part by the Chinese Scholarship Council under Grant 201607845004, in part by the Program for Changjiang Scholars and Innovative Research Team in University under Grant IRT_16R72, in part by the special fund for the Key Lab of Chongqing Municipal Education Commission, in part by the Project of Fundamental and Frontier Research Plan of Chongqing under Grant cstc2015jcyjBX0085 and Grant cstc2017jcyjAX0204, in part by the Scientific and Technological Research Program of Chongqing Municipal Education Commission under Grant KJ1600413 and Grant KJ1704088, and in part by the Qatar National Research Fund (a member of Qatar Foundation) under Grant NPRP7-125-2-061.
Glasgow Author(s) Enlighten ID:Ansari, Dr Imran
Authors: Lei, H., Zhang, J., Park, K.-H., Xu, P., Ansari, I. S., Pan, G., Alomair, B., and Alouini, M.-S.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Access
ISSN (Online):2169-3536
Copyright Holders:Copyright © 2017 IEEE
First Published:First published in IEEE Access 5: 17450-17464
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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