Physical layer security transmission algorithm based on cooperative beamforming in SWIPT system

Physical layer security transmission issue in simultaneous wireless information and power transfer(SWIPT)relay network with multiple eavesdropers is investigated in this paper.A novel cooperative beamforming algorithm is proposed to balance performance of cooperative jamming method and zero-forcing method.Using location prior information of eavesdropper,the proposed method imposes zero-forcing constraints on the capable eavesdropper and cooperative jamming on remaining weak eavesdropper,respectively.Compared with classical cooperative jamming or zero-forcing methods,the proposed method can compromise computational complexity and secrecy rate.Performance of the method is verified by simulation experiments.