Covert communication for cooperative NOMA with two phases detection
Peng H. Tian Z. Li X. Wang W. Nauryzbayev G. Rabie K. Gadekallu T.R.
15 March 2023Elsevier B.V.
Alexandria Engineering Journal
2023#6739 - 49 pp.
This paper investigates the covert communication of cooperative non-orthogonal multiple access (NOMA) systems, where the near user serves as a decode-and-forward (DF) relay and the far user receives the covert information from both the source and the near user. To improve the covertness performance, cooperative jamming and power randomness are adopted. Specifically, we derive detection error probability (DEP) of Willie and the minimum detection error probability (MDEP) at the optimal decision threshold for each phase. In addition, the reliability of the proposed system is investigated by deriving closed-form expressions for the outage probability (OP) of the two users. Under the covertness and reliability constraints, an optimization algorithm to maximize the effective covert rate is designed. Simulation results have confirmed the correctness of the theoretical analysis, and the proposed scheme can achieve a better covert communication.
Cooperative communication , Covert communication , Detection error probability , Non-orthogonal multiple access
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Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, 454003, China
Department of Computer Science, City University of Hong Kong, Hong Kong
Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Engineering, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom
School of Information Technology and Engineering, Vellore Institute of Technology, Tamil Nadu, India
Physics and Electronic Information Engineering
Department of Computer Science
Department of Electrical and Computer Engineering
Department of Engineering
School of Information Technology and Engineering
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