In this letter, we consider an unmanned aerial vehicle (UAV) relay network, where the UAV works as an amplify-and-forward relay. We optimize the trajectory of UAV, the transmit power of UAV, and the mobile device by minimizing the outage probability of this relay network. The analytical expression of outage probability is derived first. A closed-form low-complexity solution with joint trajectory design and power control is proposed to solve this non-convex problem. Simulation results show that the outage probability of the proposed solution is significantly lower than that of the fixed power relay and circle trajectory for the UAV relay.

Shuhang Zhang

Hongliang Zhang

Qichen He

Kaigui Bian

Lingyang Song

IEEE Communications Letters

IEEE COMMUNICATIONS LETTERS 在快速出版周期中发表短文，介绍通过不同媒体和渠道（包括有线、地下、波导、光纤和存储通道）进行通信的最新技术的进展。鼓励理论贡献（包括新技术、概念和分析）和实践贡献（包括系统实验和原型以及新应用）。该杂志主要关注通信系统的物理层和链路层。

IEEE Communications Letters is a rapid publication journal that publishes short articles on the latest technological advancements in communication through various media and channels, including wired, underground, waveguide, optical fiber, and storage channels. The journal encourages theoretical contributions (such as new technologies, concepts, and analyses) as well as practical contributions (including system experiments, prototypes, and new applications). It primarily focuses on the physical layer and link layer of communication systems.

IEEE Communications Letters 是一本快速出版的期刊，主要发表关于通过各种媒介和渠道（包括有线、地下、波导、光纤和存储通道）进行通信的最新技术进展的短文。期刊鼓励理论贡献（如新技术、概念和分析）以及实践贡献（如系统实验、原型和新应用）。该期刊主要关注通信系统的物理层和链路层。

Category	Quartile
计算机科学	3
计算机科学, 电信学	3

Joint Trajectory and Power Optimization for UAV Relay Networks

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