无线电通信技术2026，Vol.52Issue(2)：317-327,11.DOI:10.3969/j.issn.1003-3114.2026.02.008
IRS辅助无人机安全通信的波束成形与联合轨迹优化
Beamforming and Joint Trajectory Optimization for IRS-assisted Secure UAV Communications
摘要
Abstract
To address the strong coupling and non-convex intractability of joint beamforming and trajectory optimization in Intelli-gent Reflecting Surface(IRS)-assisted secure Unmanned Aerial Vehicle(UAV)communications,this paper focuses on a single-user Multiple-Input Single-Output(MISO)scenario and proposes to adopt a joint optimization approach based on alternating optimization and Successive Convex Approximation(SCA).In the proposed approach,alternating optimization and convex approximation strategies are employed to decouple the original problem into three subproblems,namely transmit beamforming,IRS phase-shift design,and UAV trajectory optimization.Specifically,the transmit beamformer is obtained by solving a generalized eigenvector problem at the transmitter,the IRS phase shifts are optimized via fractional programming,and the UAV trajectory is refined through convex optimization,thereby achieving a significant improvement in the system secrecy rate.Numerical simulation results demonstrate that jointly optimizing active and passive beamforming together with the UAV trajectory can effectively enhance the secrecy performance of the system.Moreover,an appropriate design of the number of transmit antennas,the number of IRS reflecting elements,and the UAV flight duration can further improve the reliability and robustness of the proposed algorithm.关键词
无人机通信/智能反射面/物理层安全/波束成形/轨迹优化Key words
UAV communication/IRS/PLS/beamforming/trajectory optimization分类
信息技术与安全科学引用本文复制引用
王文捷,仲伟志,李欣妮,张恒硕,华博宇..IRS辅助无人机安全通信的波束成形与联合轨迹优化[J].无线电通信技术,2026,52(2):317-327,11.基金项目
国家自然科学基金面上项目(62271250,62431014) （62271250,62431014）
南京航空航天大学空间光电探测与感知工业和信息化部重点实验室开放课题资助(NJ2025050-02) （NJ2025050-02）
中央高校基本科研业务费资助(NJ2025050) National Natural Science Foundation of China(General Program)(62271250,62431014) （NJ2025050）
Supported by Open Project Funds for Key Laboratory of Space Photoelectric Detection and Perception(Nanjing University of Aeronautics and Astronautics),Ministry of Industry and Information Technology(NJ2025050-02) （Nanjing University of Aeronautics and Astronautics）
Supported by the Fundamental Research Funds for the Central Universities(NJ2025050) （NJ2025050）
