基于全双工的主动监听系统中合法通信速率最大化方法设计  

Legitimate communication rate maximization in full-duplex based proactive eavesdropping systems

作　　者：吴伟 胡冰[2] 胡峰 WU Wei;HU Bing;HU Feng(College of Telecommunications&Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,Chin;College of Modern Posts,Nanjing University of Posts and Telecommunications,Nanjing 210003,Chin;College of Internet of Things,Nanjing University of Posts and Telecommunications,Nanjing 210003,Chin)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学现代邮政学院,江苏南京210003 [3]南京邮电大学物联网学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2020年第2期48-53,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61901231);江苏省自然科学基金(BK20180757)资助项目。

摘　　要：提出了一种新颖的全双工主动监听系统,该系统具备两种工作模式:干扰模式和中继模式。在干扰模式下,监听器以发送干扰信号的方式干扰可疑通信进而确保成功监听。在中继模式下,监听器以全双工中继辅助的方式降低可疑发送者的信息发送功率并保证合法通信的有效进行。研究目标是在满足监听器的发送功率限定和最低监听速率要求情况下,通过联合优化监听器的发送波束成形和工作模式,从而实现对合法链路通信速率的最大化设计。建模的混合整式规划问题非凸且难以求解,文中将其分解为对两个标量的搜索问题,有效地降低了问题的复杂度。进一步地提出了高效的数学算法,给出了该问题的最优解。仿真结果表明了所提系统和方法的优越性。A novel full-duplex proactive eavesdropping system with two work modes:interference mode and relay mode is proposed.For the interference mode,the monitor can ensure the successful eavesdropping of suspicious link by sending jamming signals.For the relay mode,the transmission power of the suspicious transmitter can be reduced and the legitimate communication performance can be guaranteed with the aid of full-duplex relay.To meet requirements of transmission power budget and eavesdropping rate of the monitor.It aims at maximizing the legitimate communication rate by jointly designing the transmission beamforming and the work mode decision on the monitor.Since the formulated mixed integer programming problem is non-convex and hard to be solved,it is decomposed into a search problem for two scalars,thus reducing the complexity.And then,an efficient algorithm is proposed.Simulation results demonstrate the superiority of the proposed scheme.

关 键 词：主动监听 全双工 波束成形 工作模式选择 优化设计 

分 类 号：TN918[电子电信—通信与信息系统]