Joint cooperative beamforming and artificial noise design for secureAF relay networks with energy-harvesting eavesdroppers

摘要: In this paper, we investigate physical layer security for simultaneous wireless information and power transfer in amplify-and-forward relay networks. We propose a joint robust cooperative beamforming artificial noise scheme secure communication efficient energy transfer. Specifically, by treating the receiver as potential eavesdropper assuming that only imperfect channel state can be obtained, formulate an optimization problem to maximize worst-case secrecy rate between source legitimate under both constraint at relays harvest receiver. Since such is non-convex hard tackle, two-level approach which involves one-dimensional search semidefinite relaxation. Simulation results show proposed achieves better performance than other schemes.