Spectral efficiency optimization for rotatable antenna-assisted unmanned aerial vehicle communication systems

LI Yixuan; WANG Ji; LI Xingwang; XU Hongbo; CUI Qimei; LI Lihua

doi:10.11959/j.issn.2096-3750.WLW26062

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Spectral efficiency optimization for rotatable antenna-assisted unmanned aerial vehicle communication systems

更新时间：2026-06-30

- Spectral efficiency optimization for rotatable antenna-assisted unmanned aerial vehicle communication systems
- Chinese Journal on Internet of Things (2026)
- 作者机构：
  
  1.华中师范大学物理科学与技术学院，湖北武汉 430079
  2.北京邮电大学网络与交换技术国家重点实验室，北京 100876
  3.河南理工大学物理与电子信息学院，河南焦作 454003
  4.北京邮电大学信息与通信工程学院，北京 100876
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.2096-3750.WLW26062
  CLC： TN929.5
- Received：20 May 2026，
  
  Revised：2026-06-02，
  
  Accepted：30 June 2026，
- 稿件说明：
移动端阅览
LI Yixuan, WANG Ji, LI Xingwang, et al. Spectral efficiency optimization for rotatable antenna-assisted unmanned aerial vehicle communication systems[J/OL]. Chinese Journal on Internet of Things, 2026.
DOI：

LI Yixuan, WANG Ji, LI Xingwang, et al. Spectral efficiency optimization for rotatable antenna-assisted unmanned aerial vehicle communication systems[J/OL]. Chinese Journal on Internet of Things, 2026. DOI： 10.11959/j.issn.2096-3750.WLW26062.

摘要

为实现低空经济场景下的高质量无线通信，本文研究了一种可转向天线（RA，rotatable antenna）技术辅助无人机（UAV，unmanned aerial vehicle）通信系统，借助定向天线的高波束增益和三维转向带来更高的空间自由度来高效接收多个地面用户发送的信号。首先，本文构建了一个最大化最小频谱效率的优化问题。同时，本文研究了动态转向和静态转向两种RA工作模式，分别用于实现更强的波束调控能力和更低的硬件设计难度。针对所构建的非凸原问题，本文提出了一种基于连续凸逼近的高性能迭代算法来联合优化RA转向角度、时间分配以及UAV飞行轨迹。此外，本文还推导出动态转向模式下RA转向角度的闭式最优解。最后，仿真结果验证了所提出的RA辅助UAV通信方案的性能显著优于可移动天线、各向同性天线和固定天线方案。

Abstract

To enable high-quality wireless communications in low-altitude economy scenarios

this paper investigates a rotatable antenna (RA)-assisted unmanned aerial vehicle (UAV) communication system. By leveraging the high directional gain of directional antennas and the spatial degrees of freedom provided by three-dimensional rotation

the UAV can efficiently receive uplink signals from multiple ground users. First

we formulate an optimization problem to maximize the minimum spectral efficiency among all ground users. Then

we investigate two RA rotation modes

namely the dynamic and static rotation modes

which aim to enhance beam-steering capability and reduce hardware implementation complexity

respectively. To tackle the resulting non-convex problem

we propose an efficient iterative algorithm based on successive convex approximation

where the RA rotation angles

time allocation

and UAV trajectory are jointly optimized. In addition

a closed-form solution for the optimal RA rotation angles is derived for the dynamic rotation mode. Finally

simulation results verify that the proposed RA-assisted UAV communication scheme achieves significantly better performance than conventional movable-antenna

isotropic-antenna

and fixed-antenna schemes.

关键词

Keywords

references

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