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联合优化无人机位置和功率的用户吞吐量最大化方法

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因移动便捷、高视距通信概率等优势,无人机(Unmanned Aerial Vehicle,UAV)在应急通信中发挥重要作用.为此,提出联合优化UAVs位置和传输功率的吞吐量最大化(Joint optimization of UAV 3-D Position and Transmit powers for throughput Maximization,JPTM)方法,进而提高地面用户的吞吐量.先构建一个联合UAVs三维位置和传输功率的优化问题.考虑到该问题的非凸优化性,将其分解为两个子问题.用Mean-Shift算法求解第一个问题,获取最优的UAVs水平位置.采用分而治之策略,将第二个子问题再分解,并利用一阶泰勒级数展开对两个子问题进行近似处理,形成标准凸化问题,然后利用CVX工具求解.性能分析表明,相比于基于圆形堆积理论部署UAVs策略(Circle Packing Theorem-based Deployment,CPTD)和基于多变量仿真的能效 UAVs 部署策略(Energy-Efficient Variable simultaneous Deployment,EEVD)算法,JPTM算法提高了地面用户的吞吐量.
Throughput Enhancement Method Based on Joint Position and Transmit Power of UAV
Unmanned Aerial Vehicles(UAVs)plays an important role in wireless networks due to the advantages of high mobility and high line-of-sight communication probability.Therefore,joint optimization of UAV 3-D position and transmit powers for throughput maximization(JPTM)algorithm is proposed in this paper.In JPTM,joint optimization problem of 3-D placement and transmit power of UAV was established to maximize the throughput.The problem was a nonconvex optimization problem,and the problem is divided into two optimization problem.The first optimization problem is solved by Mean-shift algorithm and the optimal horizontal locations of UAVs are calculated.The second optimization problem are decomposed by divide-and-conquer strategy,and the sub-problem are approximated by first-order Taylor expansion.The sub-problem is formed to be standard convexity problem,which is solved by CVX tool.Simulation results have demonstrated that JPTM results in throughput performance as compared to Circle Packing Theorem-based Deployment(CPTD)of UAVs and Energy-Efficient Variable simultaneous Deployment(EEVD)algorithm.

UAV communication3-D deploymentTransmit power optimizationMean-shift algorithmFirst-order taylor expansion

陈丹、杨洪朝、谢英辉

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长沙民政职业技术学院,长沙,410004

无人机通信 三维位置部署 传输功率优化 Mean-Shift算法 一阶泰勒级数展开

湖南省自然科学基金项目湖南省创新型省份建设专项科普专题项目中国高校产学研创新基金长沙市自科基金长沙市自科基金

2022JJ601032022ZK40452021ITA10023kq2208240kq2402035

2024

10.12060/j.issn.1000-7202.2024.03.13

宇航计测技术
中国航天科技集团一院102所 二院203所

宇航计测技术

CSTPCD
影响因子：0.189
ISSN：1000-7202
年,卷(期)：2024.44(3)
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