摘要
无人机群辅助通信系统可以改善现有无线通信网络,提升系统服务质量和通信服务覆盖范围,但无线信道的开放特性使无人机通信系统极易被非法用户窃听。为此提出了一种基于协作波束成形的无人机群安全通信算法,该算法综合考虑无人机群中各无人机的相对位置、能量,以及无人机群的整体移动和天线阵列的波束,实现最大化系统的保密率。由于该优化问题存在高度耦合的非凸项,将初始问题分解为两个子问题,并通过泰勒展开、凸松弛等方式,设计了一种循环迭代的逐次凸逼近算法进行求解。仿真结果表明,该优化方案可以有效提升系统保密率,实现物理层安全通信,并能获得比其他算法更好的效果。
UAV swarm assistance communication system can improve the existing wireless communication network,enhance the system service quality and coverage.However,the open characteristics of wireless channels make drone communication systems extremely vulnerable to eavesdropped by illegal users.A safe communication algorithm for UAVs based on cooperative beamforming was proposed.To maximize the confidentiality of the system,the relative position and energy of each drone in the swarm,as well as the overall movement of the swarm and the beam of the antenna array,were comprehensively considered.Since this optimization problem was characterized by highly coupled non-convex terms,the initial problem was decomposed into two sub-problems and a cyclic iterative succes‐sive convex approximation algorithm was designsed to solve it through Taylor expansion and convex relaxation.Simulation results show that the optimization scheme proposed can effectively improve the system confidentiality rate,realize physical layer secure communication,and achieve better results compared with other comparison algorithms.
作者
韩东升
赵逸朔
HAN Dongsheng;ZHAO Yishuo(Department of Electronic and Communication Engineering,North China Electric Power University,Baoding 071003,China;Hebei Province Electric Power Internet of Things Technology Key Laboratory,North China Electric Power University,Baoding 071003,China)
出处
《电信科学》
北大核心
2025年第6期57-69,共13页
Telecommunications Science
基金
河北省省级科技计划项目(No.SZX2020034)。
关键词
无人机通信
虚拟天线阵列
协作波束成形
安全通信
UAV communication
virtual antenna array
cooperative beamforming
secure communication
