Covert Transmission Against Joint Transmission Detection Based on Cooperative Jamming

doi:10.3778/j.issn.1002-8331.2012-0096

Abstract

Abstract: A covert communication method is proposed in a two-hop wireless communication network with multiple jammers, in which a source sends information to its destination with the help of a relay. In this work, a warden detects the two stages of the two-hop transmission and makes a decision of whether there is a transmission between the source and the destination. Firstly, a joint decision making criterion is proposed, and the corresponding minimum detection error probability is derived. Secondly, aiming at maximizing the covert transmission rate of legitimate users, the optimal transmission power of the source and the relay under the constraint of minimum detection error probability is obtained. Finally, a jammer selection scheme is proposed. Simulation results show that the proposed method can effectively resist the impact of two-stage joint detection, and can obtain a higher covert transmission rate than traditional ways.

Key words: covert communication, joint decision, detection error probability, jammer selection, covert transmission rate

摘要： 针对两跳无线隐蔽通信网络，提出了一种多干扰节点协作的隐蔽通信方法。在该网络中源节点通过中继节点的帮助向目的节点发送保密信息，检测者对两跳信息传输的两个阶段均进行检测，并以此判断源与目的节点间是否进行了通信。提出两阶段检测的联合判决准则，并在此基础上推导得到了两个阶段检测者的最优判决门限及相应的最小检验错误概率；以最大化合法节点隐蔽传输速率为目标，在最小检验错误概率满足给定要求的前提下得到系统总发射功率的最大值和最佳功率分配方案；提出两跳传输的干扰节点选择方法。仿真结果表明，该方法所获得的隐蔽传输速率显著优于现有方法，可有效对抗检测者两阶段联合检测对系统性能带来的影响。

关键词: 隐蔽通信, 联合判决, 检验错误概率, 干扰节点选择, 隐蔽传输速率

HUI Hui, WANG Ying, ZHANG Yanxiang. Covert Transmission Against Joint Transmission Detection Based on Cooperative Jamming[J]. Computer Engineering and Applications, 2022, 58(8): 109-116.

惠鏸, 王滢, 张琰祥. 基于协作干扰对抗联合检测的隐蔽传输方法[J]. 计算机工程与应用, 2022, 58(8): 109-116.

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