A Simple Beamforming Design for Secure in MIMO SWIPT System

Abstract

This paper investigates the beamforming design for secure transmission in multiple-input multiple-output (MIMO) communication systems with simultaneous wireless information and power transfer (SWIPT), where the energy harvesting (EH) receivers may eavesdrop the confidential information send to the information decode (ID) receiver. To solve the nonconvex problem, we propose a simple solution, which is to choose a beamforming matrix part first, then find the rest of the beamforming matrix by solving the convex problem. Finally, numerical results are provided to validate our proposed algorithm.