多天线频谱共享认知网络保密中断概率分析  

Secrecy Outage Analysis of Spectrum Sharing Cognitive Radio Networks with Multiple Antenna

作　　者：张智靓[1] 嵇建波 ZHANG Zhiliang;JI Jianbo(Department of Urban Construction Engineering,Zhejiang College of Construction,Hangzhou 311231,China;College of Electronic Information and Automation,Guilin University of Aerospace Technology,Guilin 541004,China)

机构地区：[1]浙江建设职业技术学院城市建设工程系,杭州311231 [2]桂林航天工业学院电子信息与自动化学院,广西桂林541004

出　　处：《电讯技术》2018年第3期320-325,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61650103);广西自然科学基金资助项目(2014GXNSFAA118385);浙江省自然科学基金公益技术研究项目(LGG18F030007)

摘　　要：针对单输入多输出认知无线电网络,研究了瑞利衰落信道下采用最大比合并时保密中断性能。在所研究的系统中,次用户发射机发送机密信息给另一个次用户接收机,次用户接收机配备多个天线并且采用最大比例合并多个接收信号。同时,拥有多个天线窃听者也采用最大比合并方案偷听次用户发射机和次用户接收机之间传送的信息。频谱共享下次用户发射机工作时必须保证主用户的服务质量。推导了保密中断概率的精确表达式,分析了系统保密中断概率渐近性能。仿真结果验证了分析的正确性。This paper investigates the secrecy outage performance of maximal ratio combining(MRC)in cognitive radio networks(CRNs)over Rayleigh fading channels.In the considered system,a secondary user transmits confidential messages to another secondary user receiver,which is equipped with multiple antennas and adopts the MRC scheme to process multiple received signals.Meanwhile,an eavesdropper equipped with multiple antennas also adopts the MRC scheme to overhear the transmitted information between secondary transmitter and secondary receiver.Secondary user transmitter adopts an underlay strategy to guarantee the quality of service of the primary user in spectrum sharing.This paper derives an exact closed-form expressions for the secrecy outage probability and analyzes the asymptotic performance.Simulation results validate the correctness of the analysis.

关 键 词：认知无线电网络 频谱共享 最大比合并 保密中断概率 渐近性能 

分 类 号：TN911.7[电子电信—通信与信息系统]