Improving Secrecy Rate in NOMA Network with Jamming Schmes

This article explores the issue of physical layer security (PLS) through an analysis of a Non-Orthogonal Multiple Access (NOMA) network using multiple jamming strategies. In this network, a source transmits multiplexed signals to NOMA users when Eve is present. A jammer node adds interference signals to prevent Eve from wiretapping the secret information of the NOMA users. By deploying a new control-jammer (CJ) strategy to this network, it is possible to maximize secrecy rate at both NOMA users while working under a total power constraint. The main focus of the proposed work is on evaluating the PLS analysis of the network in terms of secrecy rate, with particular attention to the CJ condition. Additionally, the study measures the security performance difference between CJ and other jamming methods. Notably, the simulation findings confirm that CJ is effective in boosting the security of the NOMA network compared with other jamming strategies.