A Physical Layer Security Transmission Mechanism Based on Joint Channel Characteristics in Relay System

摘要：

　　To solve the problem of untrusted relays,we propose a physical layer security transmission mechanism in relay system.We get the joint channel characteristics by combining the two channels,source node to relay and relay to destination node,into one.Based on this,we construct artificial noise and add it to the transmission signal,in order to make the internal and external wire-tappers get none of the information.The optimal signal transmission power is calculated subsequently.Simulation results show that when the artificial noise lies in the null space of the legitimate receivers channel,secrecy capacity of the cooperative relay system can be improved and the bit-error rate of the legitimate receiver is much smaller than wire-tappers.

关键词： Physical-layer security secrecy capacity artificial noise

作者: LI Xiang-yu JIN Liang HUANG Kai-zhi

作者单位: National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China

会议类型: 国际会议

会议名称: 2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))

会议地点: 成都

会议语种:英文

页码: 661-665

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）