基于无线衰落的SIMO中继网络物理层安全性能分析  

Analysis of Physical Layer Security Performance of SIMO Relay Network over Wireless Fading Channel

作　　者：贾盼盼 马雪雪 孙江峰[3] JIA Panpan;MA Xuexue;SUN Jiangfeng(School of Software,Henan Polytechnic University,Jiaozuo 454003,China;School of Physics&Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学软件学院,河南焦作454003 [2]河南理工大学物理与电子信息学院,河南焦作454003 [3]河南理工大学计算机科学与技术学院,河南焦作454003

出　　处：《无线电工程》2024年第3期543-549,共7页Radio Engineering

基　　金：国家自然科学基金(61503124)。

摘　　要：针对单输入多输出(Single Input Multiple Output, SIMO)可以提高系统传输速度和信道容量以及中继网络能够扩充传输范围和提升系统可靠性的特点,研究了瑞利衰落信道模型下SIMO中继系统的物理层安全(Physical Layer Security, PLS)性能。以Wyner窃听模型为基础构建了SIMO中继网络,推导出的安全中断概率(Secure Outage Probability, SOP)和严格正保密容量概率(Strictly Positive Secrecy Capacity, SPSC)的闭合理论式均以统一的函数表示,并根据合法端与窃听端的不同天线数量分成了2种场景进行分析。用蒙特卡洛仿真验证了推导的理论公式的正确性。实验表明,通过提高合法链路的信噪比、降低窃听链路的信噪比、减小阈值和增加用户端的天线数量均可以有效提升SIMO系统的防窃听能力。Aiming at the characteristics of Single Input Multiple Output(SIMO)that can improve system transmission speed and channel capacity,as well as the ability of relay networks to expand transmission range and improve system reliability,the Physical Layer Security(PLS)performance of SIMO relay system over the Rayleigh fading channel model is studied.Based on the Wyner eavesdropping model,the SIMO relay network is constructed.The closed-form theoretical formulas for Secure Outage Probability(SOP)and Strictly Positive Secrecy Capacity(SPSC)are expressed in a unified function.Two scenarios are analyzed based on the different number of antennas at the legitimate and eavesdropping ends.Finally,the correctness of the derived results is verified by Monte Carlo simulation.Experiments have shown that increasing the signal to noise ratio of legitimate link,reducing the signal to noise ratio of eavesdropping link,reducing threshold and increasing the number of antennas on the user end can effectively enhance the anti-eavesdropping ability of SIMO system.

关 键 词：单输入多输出 物理层安全 中继系统 性能评估 

分 类 号：TN914[电子电信—通信与信息系统]