RIS?assisted secure UAV communications with resource allocation and cooperative jamming

Unmanned aerial vehicles (UAVs) are widely used in wireless communication networks due to their rapid deployment and high mobility. However, practical scenarios, the existence of obstacles eavesdroppers will seriously interfere with quality UAV network produce a security risk. Thus, this paper combines reconfigurable intelligent surface (RIS) technology UAVs build secure network. Normally, rotary-wing (labeled as UAV-S) acting base station sends information signals legitimate user on ground RIS equipment. there is passive eavesdropper who can steal information. Therefore, friendly jammer UAV-J) fixed location introduced send jamming confuse eavesdropper. The goal maximize average secrecy rate by jointly optimizing flight trajectory, transmit power UAV-S UAV-J, phase shifter RIS. Since constructed problem highly nonconvex, an alternating optimization algorithm based successive convex approximation techniques proposed solve problem. Simulation results show that achieve higher comparison other schemes.