Zhao Xuehui, Zhong Yuanchang, Mao Zhongyuan, He Xunzhuo
School of Electrical Engineering, Chongqing University, Chongqing, 400044, China.
Sci Rep. 2025 Apr 13;15(1):12701. doi: 10.1038/s41598-025-97571-6.
Unmanned Aerial Vehicles (UAVs) can provide flexible wireless connectivity in temporary hotspots and disaster-stricken areas, but their energy constraints remain a challenge. In this paper, we propose a laser-powered UAV relay system where UAVs harvest energy from ground-based laser transmitters and operate in a multi-link shared spectrum environment. With the goal of maximizing the minimum system link throughput, we formulate a joint optimization problem for UAV trajectory and power control and propose an iterative algorithm to efficiently manage energy and mitigate co-channel interference while solving this non-convex problem. Simulation results validate the effectiveness of the proposed scheme and highlight significant performance gains achieved through joint optimization, underscoring the potential of laser-powered UAVs to overcome energy limitations and enhance overall system performance.
无人机（UAVs）可以在临时热点地区和受灾地区提供灵活的无线连接，但它们的能量限制仍然是一个挑战。在本文中，我们提出了一种激光供电的无人机中继系统，其中无人机从地面激光发射器收集能量，并在多链路共享频谱环境中运行。以最大化最小系统链路吞吐量为目标，我们制定了无人机轨迹和功率控制的联合优化问题，并提出了一种迭代算法，以在解决这个非凸问题的同时有效地管理能量和减轻同信道干扰。仿真结果验证了所提方案的有效性，并突出了通过联合优化实现的显著性能提升，强调了激光供电无人机克服能量限制和提高整体系统性能的潜力。
