Physical layer security transmission scheme based on artificial noise in cooperative SWIPT NOMA system

Abstract Aiming at high energy consumption and information security problem in the simultaneous wireless power transfer (SWIPT) multi-user wiretap network, we propose a user-aided cooperative non-orthogonal multiple access (NOMA) physical layer transmission scheme to minimize base station (BS) transmitted this paper. In scheme, user near from BS is adopted as friendly relay improve performance of far BS. An harvesting (EH) technology-based SWIPT employed collect which can be used stage. Since eavesdropper downlink NOMA system may use successive interference cancellation (SIC) technology obtain secrecy receiver, tackle problem, artificial noise (AN) enhance information. Moreover, semidefinite relaxation (SDR) method convex approximation (SCA) technique are combined solve above non-convex problem. Simulation results show that comparison with other methods, our effectively reduce on constraints certain level rates two users.