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Cooperative Secure Transmission in MISO-NOMA Networks

National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
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Electronics 2020, 9(2), 352; https://doi.org/10.3390/electronics9020352
Received: 2 February 2020 / Revised: 14 February 2020 / Accepted: 15 February 2020 / Published: 19 February 2020
(This article belongs to the Special Issue Cooperative Communications for Future Wireless Systems)
In this paper, we investigate cooperative secure transmission in non-orthogonal multiple access (NOMA) networks where a source (Alice) intends to transmit confidential messages to one legitimate user with high-level security requirement (LU1), and serve another normal one (LU2) simultaneously. In order to enhance the transmission security, a cooperative jammer (Charlie) is employed to confuse multiple non-colluding eavesdroppers (Eves). Taking both secrecy outage restriction of LU1 and the desired quality of service (QoS) requirement of LU2 into consideration, we propose an adaptive power allocation strategy for maximizing secrecy rate. Numerical results are provided to validate that our proposed scheme significantly outperforms the conventional NOMA secure transmission scheme. View Full-Text
Keywords: non-orthogonal multiple access; secrecy rate; secrecy outage probability; power allocation non-orthogonal multiple access; secrecy rate; secrecy outage probability; power allocation
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Chen, Y.; Zhang, Z.; Li, B. Cooperative Secure Transmission in MISO-NOMA Networks. Electronics 2020, 9, 352.

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