基于符号选择性传输的隐蔽通信方案  

Covert Communication Scheme Based on Symbol Random Transmission

作　　者：崔志远 黄开枝[2] 林钰达 CUI Zhiyuan;HUANG Kaizhi;LIN Yuda(School of Cyber Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]郑州大学网络空间安全学院,河南郑州450001 [2]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2023年第1期1-8,共8页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(61871404)。

摘　　要：传统跳时通信侧重于增强信号的抗干扰与抗截获能力,对信号隐蔽性能研究较少。随着非法方信号检测时间颗粒度越来越精细,提升合法信号的隐蔽能力显得尤为重要。针对以上问题,提出一种基于符号选择性传输的隐蔽通信方案,通过细化发送时间颗粒度,在随机选择的单个时隙内随机选择不同符号周期进行信息传输,使得非法方对检测窗口内的通信时间和接收功率具有不确定性,从而发生检测错误。在三节点隐蔽场景下,推导了隐蔽概率下界闭式表达式,并进一步分析了最大隐蔽速率与最优发送功率的定量关系。仿真结果表明,与随机选择时隙的隐蔽通信方案相比,所提方案在隐蔽概率和隐蔽速率上分别具有25%和20%的性能提升。Traditional time-hopping communication focuses on enhancing the anti-jamming and anti-interception capability of the signal,but the covert performance of the signal is seldom studied.As the granularity of signal detection time of illegal side becomes more and more precise,it is particularly important to improve the concealment ability of legal signals.To solve above problems,this paper proposes a covert communication scheme based on symbolic selective transmission.By increasing the granularity of the send time,different symbol periods are randomly selected for information transmission in a randomly selected single time slot,making the illegal side uncertain about the communication time and received power within the detection window,so as to incur detection errors.In the three-node covert scenario,the lower bound closed expression of concealment probability is derived,and the quantitative relationship between the maximum covert rate and the optimal transmission power is further analyzed.Simulation results show that the performance of this scheme is improved by 25% and 20% respectively in the probability and rate of covert compared with the scheme of random selection of time slots.

关 键 词：隐蔽通信 跳时通信 符号选择性传输 

分 类 号：TN918.91[电子电信—通信与信息系统]