联合多用户调度与协作干扰选择的无线物理层安全研究  

Physical Layer Secrecy Analysis of Joint User Scheduling and Jammer Selection

作　　者：邹玉龙[1] 蒋元[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《数据采集与处理》2015年第4期766-773,共8页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(61302104;61401223)资助项目;江苏省自然科学基金(BK20140887)资助项目;江苏省高校自然科学研究重大项目(15KJA510003)资助项目

摘　　要：物理层安全策略作为一种利用无线信道物理特性来对抗窃听者的有效手段,已经吸引了越来越多的关注。本文重点研究多用户调度与协作干扰技术在无线通信物理层安全方面的表现,并将两种技术有机结合,深入研究无线网络的通信安全。通过联合采用多用户调度方案与协作干扰技术以增强无线通信安全,在多用户无线通信网络中,采用多用户调度策略,在选择最优信道进行通信的同时,对窃听节点进行协作干扰,在合法用户端通过波束权重矩阵对干扰信号进行合并以消除干扰信号对接收端的影响,最终达到在不干扰合法通信的前提下极大地干扰窃听信道,最终增强无线网络的通信安全。数值仿真表明,联合多用户调度与协作干扰的方案的安全中断概率明显低于仅采用多用户调度的方案。Physical layer security（PLS）is an effective means to protect communications against eavesdropping attacks by exploiting physical characteristics of wireless channels.As the information and communication technology（ICT）has been developed for decades,PLS attracts more and more attention of researchers.Here,PLS performance of the joint multi-user scheduling and the cooperative jammer selection is explored.With the combination of the two techniques,the wireless communication security is investigated.In a wireless communication system with multiple users,multi-user scheduling schemes are adopted to choose one legitimate user of the best channel to transmit signals.Meanwhile,the eavesdroppers are interfered to keep the transmissions between BS and legitimate users confidential for avoiding the interference to the legitimate users.CJ signal is designed so that nulls are formed at the legitimate users.Simulation results show that the joint multi-user scheduling and cooperative jammer scheme has a better performance of security than the multi-user scheduling scheme.

关 键 词：物理层安全 多用户调度 协作干扰 安全中断概率 安全分集度 

分 类 号：TN911.1[电子电信—通信与信息系统]