Physical Layer Security Enhancement via IRS-based on PD-NOMA and Cooperative Jamming

Intelligence reconfigurable surfaces (IRS) have attracted attention due to their ability create an intelligent and controllable wireless propagation environment for supporting efficient, secure design. Security privacy protection are fundamental requirements based on the eavesdropping attacks in networks. Physical layer security (PLS) is important technique that guarantees information-theoretic regardless of computational capability eavesdropping. In addition, non-orthogonal multiple access (NOMA) as a transmission supports higher spectral efficiency. With aim increasing secrecy rate (SR), we propose practical scenario equipped with IRS-assisted NOMA, containing obstacles cause no existing direct link between base station (BS), users, eavesdropper. Despite presence IRS second user, first user acts amplifier forwarder (AF) relay device-to-device (D2D) communication. An eavesdropper tracks transmitting signals two phases: user. Therefore, broadcast cooperative jamming signal which known To analyze proposed system model, obtain closed form ergodic numerical results reveal elements can enhance it. Finally, compare performance orthogonal (OMA) NOMA shows provide 50% more compared OMA.