基于3D波束成形的隐蔽无线通信威胁区域构建  

Threat region development of covert wireless communication based on 3D beamforming

作　　者：林钰达 金梁[1] 黄开枝[1] 韩乾 Yuda LIN;Liang JIN;Kaizhi HUANG;Qian HAN(PLA Strategic Support Force Information Engineering University,Zhengzhou 450002,China;Purple Mountain Laboratories:Networking,Communications and Security,Nanjing 211189,China)

机构地区：[1]战略支援部队信息工程大学,郑州450002 [2]网络通信与安全紫金山实验室,南京211189

出　　处：《中国科学：信息科学》2021年第8期1360-1374,共15页Scientia Sinica(Informationis)

基　　金：国家重点研发计划(批准号:2017YFB0801900)项目资助。

摘　　要：为了实时且直观地评估当前隐蔽无线通信系统所面临的未知非法检测威胁,本文首次定义了隐蔽威胁区域并设计了相应轻量级算法.首先,在莱斯衰落信道和噪声不确定条件下构建了基于3D波束成形的下行隐蔽无线通信系统模型,分析了敌方最优检测性能,推导了系统最小平均隐蔽概率;然后,给出了通信速率及连接中断概率闭式表达式,求解了给定敌方位置时的系统最大化隐蔽吞吐量优化问题;最后,针对实际通信场景中无法获知敌方位置或分布规律的情形,定义了系统隐蔽威胁区域这一新的性能指标,并设计了相应轻量级算法.仿真结果验证了系统的隐蔽性能、总体性能,以及所提算法性能,揭示了背景噪声、信道环境、天线构造和系统要求等主要参数对隐蔽威胁区域的影响.In order to evaluate the unknown and illegal detecting threat intuitively for real-time covert wireless communication systems, the covert threat region is defined for the first time and the corresponding lightweight algorithm is also designed. Firstly, a system model of downlink covert wireless communication based on 3 D beamforming is constructed with Rician fading channel and noise uncertainty. And then the optimal detecting performance of the enemy is analyzed, also the minimum average covert probability of the system is derived. Furthermore, after obtaining the closed-form expressions of communication rate and connection outage probability,the optimization problem for maximum covert throughput with the given position of the enemy is solved. Finally,considering the actual communication scenario where the enemy’s location or distribution law cannot be obtained,a new performance measurement called the covert threat region is defined, and the corresponding lightweight algorithm is designed subsequently. Simulation results verify the system covertness performance, overall performance and the performance of the proposed algorithm, and show the influence of main parameters on the covert threat region, such as background noise, channel characteristics, antenna structures, and system requirements.

关 键 词：隐蔽无线通信 隐蔽威胁区域 3D波束成形 莱斯衰落 噪声不确定 

分 类 号：TN92[电子电信—通信与信息系统]