基于AN和协作干扰辅助的车载通信物理层安全性能分析  

PHYSICAL LAYER SECURITY PERFORMANCE ANALYSIS OF VEHICULAR COMMUNICATION BASED ON ARTIFICIAL NOISE AND COOPERATIVE JAMMING ASSISTANCE

作　　者：邱斌 谢晓兰[1,2] 敬超 Qiu Bin;Xie Xiaolan;Jing Chao(Guangxi Key Laboratory of Embedded Technology and Intelligent System,Guilin 541004,Guangxi,China;School of Information Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China)

机构地区：[1]广西嵌入式技术与智能系统重点实验室,广西桂林541004 [2]桂林理工大学信息科学与工程学院,广西桂林541004

出　　处：《计算机应用与软件》2024年第12期109-115,共7页Computer Applications and Software

基　　金：国家自然科学基金项目(61802085,61762031);广西自然科学基金项目(2018GXNSFBA281057);广西科技重大专项(AA19046004);广西重点研发计划项目(AB18126006);广西嵌入式技术与智能系统重点实验室开放基金项目(2019-2-7);桂林理工大学博士科研启动基金项目(GUTQDJJ2014042)。

摘　　要：针对车载无线通信的广播特性以及车辆的高移动性使得系统的安全性难以保障的问题,提出一种非理想信道状态信息(Channel State Information,CSI)下基于人工噪声(Artificial Noise,AN)和协作干扰辅助的车载通信物理层安全传输机制。利用一阶高斯马尔可夫过程刻画由于车辆高速移动引起的非理想CSI,通过AN辅助的波束成形以及协作车辆发送干扰噪声的联合,保障合法车载用户数据传输的物理层安全。考虑非理想CSI对合法链路传输和AN泄露的影响,利用随机几何理论推导合法链路安全吞吐量的封闭表达式并进行系统性能分析。通过仿真验证所提机制的有效性。Aimed at the problem that the broadcast characteristics of vehicular wireless communication and the high mobility of vehicles make it difficult to guarantee the security of the system,a physical layer security transmission mechanism based on artificial noise(AN)and cooperative interference assisted under imperfect channel state information(CSI)is proposed.The first-order Gaussian-Markov process was used to describe the non-ideal CSI caused by high-speed movement of vehicles.The physical layer security of data transmission for legitimate vehicle users was guaranteed through the combination of AN-assisted beamforming and interference noise sent by cooperative vehicles.Considering the impact of non-ideal CSI on the legitimate link transmission and AN leakage,the closed-form expression of the legitimate link security throughput was derived by using stochastic geometry theory,and the system performance was analyzed.The effectiveness of the proposed mechanism was verified by simulations.

关 键 词：车载通信 物理层安全 协作干扰 安全吞吐量 非理想信道状态信息 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术] TN949.6[电子电信—信号与信息处理]