Energy-efficient joint UAV secure communication and 3D trajectory optimization assisted by reconfigurable intelligent surfaces in the presence of eavesdroppers

We consider a scenario where an unmanned aerial vehicle (UAV), typical system (UAS), transmits confidential data to moving ground target in the presence of multiple eavesdroppers. Multiple friendly reconfigurable intelligent surfaces (RISs) help secure UAV-target communication and improve energy efficiency UAV. formulate optimization problem minimize consumption UAV, subject mobility constraint UAV that achievable secrecy rate at is over given threshold. present online planning method following framework model predictive control (MPC) jointly optimize motion configurations RISs. The effectiveness proposed validated via computer simulations.