首页|Securing Intelligent Reflecting Surface (IRS)–Aided NOMA Networks in Covert Wireless Communication Using Jammer
Securing Intelligent Reflecting Surface (IRS)–Aided NOMA Networks in Covert Wireless Communication Using Jammer
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NETL
NSTL
Wiley
In this paper, an intelligent reflecting surface (IRS)–assisted non-orthogonalmultiple access (NOMA) network is proposed in amulti-userscenario where the transmitter communicates with its receiver covertly by helping a friendly jammer. In this network,an adversary detects the communication existence of the users in the frequency band while the jammer sends the jamming signalsto the adversary to degrade its performance. In this case, the analytical expressions for the secrecy outage probability (SOP),false alarm probability, and the missed detection probability at adversary are obtained. Rayleigh fading channel is assumedas the channel model while the covert communication performance is improved. For this purpose, the total effective rates aremaximized by optimization of the transmission power, power allocation to multiple users, IRS reflection matrix, and also transmissionprobability adjustment with constraints on the detection performance and SOP. The problem is non-convex;therefore,we present the genetic algorithm (GA) method to find the suboptimal solution for the problem with lower complexity. Numericalresults show the performance improvement of the proposed algorithm in comparison to the benchmark algorithms.
covert communicationgenetic algorithm (GA)IRS–aided NOMA networkssecrecy outage probability (SOP)
Maryam Najimi
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Department of Electrical and Computer Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran
NETL
NSTL
Wiley
