Secure UAV Communication with Robust Communication and Trajectory Design

This paper proposes a communication system for UAVs to send confidential information to multiple legal receivers in the presence of multiple eavesdroppers with uncertain location region. Our goal is to maximize the secrecy rate of the system via jointly optimizing the UAV’s trajectory, transmit power and user scheduling. The formulated problem is mix-integer non-convex and challenging to be optimally solved. Thus, we propose an efficient algorithm to solve the problem iteratively based on the block coordinate descent, successive convex optimization technique and $\mathcal{S}$ – procedure. Simulation results show that the proposed algorithm outperforms the benchmark algorithms significantly.