Secure Communications for Cooperative NOMA Networks with Imperfect CSI

被引：0
|
作者：
Chen Y. [1 ]
Zhang Z.-P. [1 ]
Li B.-R. [1 ]
机构：
[1] National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu
来源：
Dianzi Keji Daxue Xuebao/Journal of the University of Electronic Science and Technology of China | 2020年 / 49卷 / 05期
关键词：
Imperfect channel state information; Non-orthogonal multiple access; Power allocation; Secrecy outage probability; Secrecy rate;
D O I：
10.12178/1001-0548.2020066
中图分类号：
学科分类号：
摘要：
This paper studied secure transmission in cooperative non-orthogonal multiple access (NOMA) networks, where one legitimate user with high-level security requirement (LU1) is overhead by multiple non-colluding eavesdroppers (Eves), and another normal user (LU2) is served by the source (Alice) simultaneously. Aiming to improve the secrecy performance, a cooperative jammer (Charlie) is employed to confound the Eves. In this more practical communication scenario, take both secrecy outage restriction of LU1 and the desired quality of service (QoS) demand of LU2 into consideration, the paper propose an adaptive power allocation strategy for maximizing secrecy rate under imperfect channel state information (CSI). Numerical results are provided to verify the effectiveness of the proposed scheme and show that the system security would be seriously degenerated with channel uncertainty. © 2020, Editorial Board of Journal of the University of Electronic Science and Technology of China. All right reserved.
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页码：674 / 679
页数：5
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