Design of a novel wireless information surveillance scheme assisted by reconfigurable intelligent surface

This paper investigates a novel wireless information surveillance scheme assisted by reconfigurable intelligent surface (RIS) beamforming and artificial noise jamming cooperation, aiming at monitoring the sent an access point (AP) to suspicious illegal user (SIU). It is assumed that AP adopt fixed maximum ratio transmission (MRT) precoding scheme, which not affected party. The goal of this maximize effective rate jointly optimizing RIS phase shifts, receive vector legitimate receiver (LR), transmit along with power antenna (JA). resultant optimization problem non-convex, its variables are highly coupled in objective function constraints. To tackle difficulty, optimized under alternate (AO) framework. Especially, intractable shifts using Riemannian manifold (RMO) algorithm penalty dual decomposition (PDD) framework semidefinite relaxation (SDR) technique, respectively. Numerical results verify effectiveness proposed algorithms, also demonstrate superiority designed over other benchmark schemes.