摘要：

针对认知无线电(CR)网络中的安全传输问题,提出基于传输中继和干扰中继联合优化选择的物理层安全方案。在主用户网络和次用户网络共存的环境中,通过优化选取协作传输中继和协作干扰中继实现信息的安全传输,并分析推导出瑞利衰落环境下该方案保密中断概率的闭式表达式。仿真结果表明,在不同参数场景下,该方案均可实现较低的保密中断概率,提升CR网络的信息传输安全性能。

关键词: 认知无线电, 物理层安全, 中继选择, 瑞利衰落, 保密中断概率

Abstract:

To improve the security level of information transmission in Cognitive Radio(CR) networks,a physical layer security scheme based on jointly optimal transmission relay and interference relay selection is proposed.This paper considers a primary network in coexistence with a secondary network,the cooperative transmission relay and the cooperative interference relay are optimized to realize the secure transmission of information.Derive closed-form expression of the secrecy outage probability of the proposed scheme under the condition of Rayleigh fading channels.Simulation results show that the scheme can achieve lower average secrecy outage probability in different scenarios,and improve the security performance of CR networks.

Key words: Cognitive Radio(CR), physical layer security, relay selection, Rayleigh fading, secrecy outage probability

中图分类号: 

• TP393