摘要
在基于有限反馈获得部分信道状态信息的条件下,研究了放大转发非可信中继系统的物理层安全传输技术.通过目的节点发送人工噪声干扰信息,使系统获得了正安全容量.推导了安全中断概率和传输中断概率的闭合表达式,分析了反馈比特数对系统安全性和可靠性的影响,进而提出了能同时兼顾系统安全性和可靠性的最优反馈比特数的自适应选择方案.
Under the condition of partial channel state information that is obtained from limited feedback,a physical layer security transmission technique is investigated for amplify-and-forward untrusted relay systems,where the positive secrecy capacity is obtained through the artificial noise interference information transmitted by the destination node. Closedform expressions for security outage probability and transmission outage probability are derived,and the impacts of the number of feedback bits on security and reliability are analyzed. Furthermore,an adaptive selection scheme for the optimal number of feedback bits is proposed in order to simultaneously satisfy both required security and reliability.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2015年第11期2247-2254,共8页
Acta Electronica Sinica
基金
国家自然科学基金(No.61401165
No.61271383
No.61201264
No.61302095)
泉州市科技计划项目(No.2013Z36)
福建省自然科学基金(No.2015J01262
No.2014J01243)
华侨大学科研基金(No.13Y0384)
关键词
物理层安全
有限反馈
非可信中继
安全中断概率
传输中断概率
physical layer security
limited feedback
untrusted relay
security outage probability
transmission outage probability