不确定噪声下变换域通信系统隐蔽传输性能分析  

Performance analysis of covert transmission based on transform domain communication system with noise uncertainty

作　　者：房亮 李思思 武善花 张浩杰[2] FANG Liang;LI Sisi;WU Shanhua;ZHANG Haojie(School of Physics and Electronic Information,Yan’an University,Yan’an 716000;School of Information and Navigation,Air Force Engineering University,Xi’an 710077,China)

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000 [2]空军工程大学信息与导航学院,陕西西安710077

出　　处：《延安大学学报（自然科学版）》2023年第3期98-104,109,共8页Journal of Yan'an University：Natural Science Edition

基　　金：国家自然科学基金项目(62101591);陕西省大学生创新创业训练计划项目(S202110719082,S202210719060)。

摘　　要：针对不确定噪声下变换域通信系统(Transform Domain Communication System,TDCS)的隐蔽传输性能展开研究,分析了当不确定噪声功率服从均匀分布和对数均匀分布时,TDCS在给定隐蔽约束条件下所能达到的最大隐蔽吞吐量。首先,对两种不确定噪声下敌对方的最优检测门限进行了推导;其次,推导了在这两种噪声下,以平均隐蔽概率和隐蔽中断概率为约束时,TDCS发射功率所对应的最大值和最小值,并分析了发射功率最大值随注入能量子载波数目的渐近收敛性;最后,基于两个约束条件对发射功率的限制,得到TDCS所能达到的最大隐蔽吞吐量。仿真结果验证了发射功率最大值的渐近收敛性,以及最大隐蔽吞吐量与距离比值、噪声不确定程度之间的关系。In this paper,the covert transmission performance on transform domain communication system(TDCS) is studied with noise uncertainty.The maximum achieved covert throughput by TDCS with a given covert constraint is analyzed when the power of uncertain noise follows uniform distribution and log-uniform distribution respectively.To be specific,the optimal detection threshold of the adversary is given under the two kinds of uncertain noise.Secondly,the maximum and minimum transmit power of TDCS are derived on the average covert probability constraint and the covert outage probability constraint under the two kinds of uncertain noise,and the asymptotic convergence of the maximum transmit power with the number of subcarriers injected energy is analyzed.Finally,the maximum achieved covert throughput by TDCS is obtained based on the two covert constraints.The simulation results verify the asymptotic convergence of the maximum transmit power and the relationship between the maximum covert throughput and the parameters,such as the distance ratio and degree of uncertainty.

关 键 词：变换域通信系统 隐蔽通信 平均隐蔽概率 隐蔽中断概率 隐蔽吞吐量 

分 类 号：TN92[电子电信—通信与信息系统]