Physical Layer Security of Non Orthogonal Multiple Access Using Reconfigurable Intelligent Surfaces

In this paper, we propose to improve the physical layer security of non orthogonal multiple access (NOMA) using reconfigurable intelligent surfaces (RIS). RIS is decomposed in different sets of reflectors dedicated to NOMA users. As reflections reach the ith user with the same phase, the transmitter can reduce its power so that the eavesdropper cannot detect its signal. We derive the secrecy outage probability and the Strictly positive secrecy capacity (SPSC) for NOMA systems using RIS for Rayleigh fading channels.

Automated summary

In this paper, we propose to enhance the physical layer security of NOMA using RIS, where reflections with the same phase can reduce transmitter power to prevent eavesdroppers from detecting the signal. We derive the secrecy outage probability and SPSC for NOMA systems with RIS in Rayleigh fading channels.