Destination-Based Cooperative Jamming in Security UAV Relay System with SWIPT

Aiming at the energy-constrained UAV relay system with eavesdroppers, a physical layer security transmission scheme combining power splitting and time switching is proposed. The energy-constrained UAV relay uses Simultaneous Wireless Information and Power Transfer (SWIPT) technology to simultaneously receive energy and information from the radio frequency signal sent by the base station, and uses the collected energy to send the information to the destination node. At the same time, the destination node uses a full-duplex mode to receive information and send interference signals to the eavesdropper, so as to maximize the system security rate. Through simulation, the influence of different factors such as artificial noise power, power allocation ratio, and source emission power on the safety performance of the system is analyzed. The simulation results show that the proposed power division and time switching scheme can increase the system security rate under certain conditions. Compared with the gradient descent algorithm, the proposed alternate iteration optimization algorithm can reduce the number of iterations.