中继网络中不准确信道状态信息下抗多窃听者的物理层安全方案  

Physical Layer Security Scheme Resistant to Multi-eavesdroppers with Inaccurate Channel State Information in Relay Network

作　　者：雷维嘉[1] 左莉杰 江雪[1] 谢显中[1] 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《电子与信息学报》2015年第9期2191-2197,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61471076;61271259;61301123);长江学者和创新团队发展计划(IRT1299);重庆市科委重点实验室专项经费资助课题

摘　　要：该文研究存在多个相互勾结的单天线窃听者的多中继传输系统中,采用零空间人工噪声和放大转发的中继波束赋形的物理层安全传输方案。在中继—窃听端的信道状态信息不准确的情况下,基于半定规划理论,对中继的波束赋形加权矩阵和人工噪声协方差矩阵进行联合优化,有效减少相互勾结的多个窃听者所获得的信息量,显著提高系统保密容量,是一种具有良好鲁棒性的物理层安全传输方案。仿真结果显示方案具有良好的性能。This paper investigates the relay transmission system in the presence of multiple collusion single-antenna eavesdroppers. A physical layer security scheme employing nullspace Artificial Noise（AN） and Amplify-and-Forward（AF） relay beamforming is designed. In the case that channel state information can not be accurately obtained, the weighted matrice of relay beamforming and the nullspace AN covariance are jointed optimized based on the Semi-Definite Programs（SDP）, which can effectively reduce the amount of the information likely to be obtained by the multiple collusion eavesdroppers and significantly improve the security capacity of the system. It is an effective physical security transmission scheme with good robustness. Simulation results verify that the scheme has good performance.

关 键 词：物理层安全 保密速率 多窃听者 不准确信道状态信息 半定规划 

分 类 号：TN925[电子电信—通信与信息系统]