Maximizing energy efficiency for covert communication in NOMA systems with reradiating on antenna

A resource allocation method is proposed to maximize the energy efficiency for covert communication in downlink NOMA systems via reradiating on antennas. Firstly, the optimization problem of maximizing the effective covert energy efficiency of the covert user is constructed under the condition of sa...

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Bibliographic Details
Published inPhysical communication Vol. 66; p. 102468
Main Authors Zeng, Yanyang, Jia, Panpan, Li, Xingwang, Tian, Xinji
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2024
Subjects
Covert communication
Energy efficiency
Non-orthogonal multiple access
Power allocation efficiency
Reradiating
Covert communication
Power allocation efficiency
Energy efficiency
Non-orthogonal multiple access
Reradiating
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Summary:A resource allocation method is proposed to maximize the energy efficiency for covert communication in downlink NOMA systems via reradiating on antennas. Firstly, the optimization problem of maximizing the effective covert energy efficiency of the covert user is constructed under the condition of satisfying the outage probability of the public user and the error detection probability of the warden. Then, the optimization problem is simplified, and the solution of the optimization problem is given when the power allocation coefficient of NOMA is known. Finally, the optimal solution is obtained by traversing the power allocation coefficient of NOMA and solving the optimization problem for each power allocation coefficient. The simulation results show that with the increase of the total power, the energy efficiency first increases and then tends to a constant, that is, there is an optimal value of the power allocation coefficient, which maximizes the energy efficiency.
ISSN:1874-4907
DOI:10.1016/j.phycom.2024.102468