Robust Trajectory and Transmit Power Design for Secure UAV Communications
arXiv:1806.06396
Abstract
Unmanned aerial vehicles (UAVs) are anticipated to be widely deployed in future wireless communications, due to their advantages of high mobility and easy deployment. However, the broadcast nature of air-to-ground line-of-sight wireless chan- nels brings a new challenge to the information security of UAV- ground communication. This paper tackles such a challenge in the physical layer by exploiting the mobility of UAV via its trajectory design. We consider a UAV-ground communication system with multiple potential eavesdroppers on the ground, where the information on the locations of the eavesdroppers is imperfect. We formulate an optimization problem which maximizes the average worst-case secrecy rate of the system by jointly designing the robust trajectory and transmit power of the UAV over a given flight duration. The non-convexity of the optimization problem and the imperfect location information of the eavesdroppers make the problem difficult to be solved optimally. We propose an iterative suboptimal algorithm to solve this problem efficiently by applying the block coordinate descent method, S-procedure, and successive convex optimization method. Simulation results show that the proposed algorithm can improve the average worst-case secrecy rate significantly, as compared to two other benchmark algorithms without robust design.
arXiv commentAccepted by IEEE Transactions on Vehicular Technology, 2018
References in corpus (6)
- Wireless Communications with Unmanned Aerial Vehicles: Opportunities and Challenges
- The Sky Is Not the Limit: LTE for Unmanned Aerial Vehicles
- Securing UAV Communications Via Trajectory Optimization
- Fundamental Tradeoffs in Communication and Trajectory Design for UAV-Enabled Wireless Network
- Joint Trajectory and Communication Design for UAV-Enabled Multiple Access
- UAV-Enabled Cooperative Jamming for Improving Secrecy of Ground Wiretap Channel