摘要
为了提高无线通信安全性,研究了无人机辅助场景下的隐蔽通信问题,使用具有波束成型技术的移动无人机对检测方进行干扰,分析并研究该场景下的隐蔽通信性能。首先,对无人机干扰场景下的系统模型进行建模,基于假设检验理论对2种场景下的检测方最优检测门限进行分析;基于所得最优检测门限,对3种情况下平均隐蔽概率进行分析;考虑到无人机会同时对合法接收方造成干扰,采用中断概率对隐蔽通信可靠程度进行判定;设计最优算法对最大隐蔽吞吐量进行求解;最后,通过仿真实验对最优算法进行验证,确定多种情况下系统平均隐蔽概率、隐蔽吞吐量和发送功率、无人机位置、无人机飞行速度以及隐蔽性要求、可靠性要求之间的关系,验证了所提最优算法的有效性。
Due to the openness of radio communication, communication security is always faced with potential threats.In order to improve the security of wireless communication, the problem of covert communication in UAV assisted scenarios is studied.Mobile UAV with beamforming technology is used to interfere with the detector, and the performance of covert communication in this scenario is analyzed.Firstly, the system model in UVA jamming scenario is modeled, and the optimal detection threshold of the detector in the two scenarios is analyzed based on the hypothesis testing theory;the average concealment probability in three cases is analyzed according to the obtained optimal detection threshold;the reliability of covert communication is determined by the interrupt probability with the interference caused by the UAV to the legitimate receiver at the same time.Furthermore, an optimal algorithm is designed to solve the maximum covert throughput.Finally, simulation experiments are conducted to verify the optimal algorithm, and the relationships among the average system concealment probability, concealment throughput and transmission power, UAV position, UAV flying speed, concealment requirements and reliability requirements are determined under various conditions, which verify the effectiveness of the proposed optimal algorithm.
作者
胡静雯
戴跃伟
刘光杰
吉小鹏
乔森
HU Jingwen;DAI Yuewei;LIU Guangjie;JI Xiaopeng;QIAO Sen(School of Electronics&Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210000,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2022年第3期152-163,共12页
Journal of Chongqing University of Technology：Natural Science
基金
国家自然基金项目(U1836104,61801073,62072250)
南京信息工程大学引进人才科研启动项目(1521082101007)。
