协作网络中基于可信与不可信中继节点的物理层安全性能优化(英文)  

Optimal Physical Layer Security Performance of Trusted and Untrusted Relay Cooperative Networks

作　　者：林松[1] 付晓梅[1] 侯永宏[1] 张立[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《南开大学学报（自然科学版）》2015年第2期104-109,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：Supported by the National 863 Project(2011AA010201)

摘　　要：为了获得最优物理层安全性能,在无线协作网络中提出了新的功率分配算法.提出了存在外部窃听节点时,可信中继节点采用放大转发和解码转发两种协作机制下的最优功率分配算法.此外,还提出了不可信中继节点采用转发放大协作机制下的最优功率分配算法,仿真结果表明在总功率一定时,对于可信中继与不可信中继的两种情况,所提出的新算法相较于传统的均等功率分配算法都获得了更高的安全容量.To obtain the optimal physical layer security performances, the new power allocation algorithms in wireless cooperative networks with the presence of eavesdroppers are proposed. Both the amplify-and-for- ward （AF） and decode-and-forward （DF） cooperative protocols with trusted relay are investigated. In particu- lar, the optimal power allocation algorithm of amplify-and-forward cooperative protocol with untrusted relay is also proposed. It can be shown that under the constraint of fixed total power of the source and the relay, new algorithms achieve higher secrecy capacities than traditional uniform power allocation algorithm with the trusted relay and the untrusted relay.

关 键 词：物理层安全 最优安全性能 不可信中继 功率分配 协作机制 

分 类 号：TN925[电子电信—通信与信息系统]