无线电工程2025，Vol.55Issue(10)：1976-1985,10.DOI:10.3969/j.issn.1003-3106.2025.10.004
基于RIS辅助的UAV物理层安全传输技术
RIS-assisted UAV Physical Layer Secure Transmission Technology
摘要
Abstract
This work investigates the Physical Layer Security(PLS)transmission technology for UAVs assisted by Reconfigurable Intelligent Surfaces(RIS)in low-altitude communication scenarios.Considering potential multi-eavesdropping threats,a security enhancement mechanism is proposed based on the joint optimization of UAV trajectory and RIS phase shift.Specifically,two optimization schemes are proposed:①Based on convex optimization theory,the non-convex problem is decomposed into solvable convex subproblems through Successive Convex Approximation(SCA)and alternating optimization to maximize the average secrecy rate;and ②The Deep Reinforcement Learning(DRL)with Twin Delayed Deep Deterministic Policy Gradient(TD3)algorithmis introduced,which utilizes dual Q-networks and delayed policy update mechanisms to jointly optimize the UAV trajectory and RIS phase shifts.This enables smooth and efficient UAV trajectory generation in continuous action spaces,supporting real-time optimization.The simulation results show that the convex optimization algorithm converges rapidly.The TD3-based DRL approach outperforms the convex optimization method in terms of secrecy rate.Its advantage becomes more obvious especially when the number of RIS elements increases,which verifies its potential in improving communication security and robustness.关键词
UAV通信/智能超表面/物理层安全/凸优化算法/双延迟深度确定性策略梯度算法Key words
UAV communication/RIS/PLS/convex optimization/TD3 algorithm分类
信息技术与安全科学引用本文复制引用
丁伟豪,屈正浩,申凌峰,王光辉,朱政宇,张千坤..基于RIS辅助的UAV物理层安全传输技术[J].无线电工程,2025,55(10):1976-1985,10.基金项目
国家自然科学基金(92467103,92367302) （92467103,92367302）
河南省交通运输厅科技项目(2023-3-2) （2023-3-2）
河南省科技攻关项目(252102210176,252102210232) （252102210176,252102210232）
河南省教育厅重点项目(25A510015,25A520008)National Natural Science Foundation of China(92467103,92367302) （25A510015,25A520008）
Science and Technology Program of Department of Transporta-tion of Henan Province(2023-3-2) （2023-3-2）
Key Science and Technology Program of Henan Province(252102210176,252102210232) （252102210176,252102210232）
Project of Educational Department of Henan Province(25A510015,25A520008) （25A510015,25A520008）
