基于NOMA场景的多用户调度物理层安全性能分析  

Security Performance Analysis of Multi-user Scheduling Physical Layer Based on NOMA Communication Scenario

作　　者：岳雪峰 余钢 冯友宏[1] 曹喜珠[3] 董国青[1] YUE Xuefeng;YU Gang;FENG Youhong;CAO Xizhu;DONG Guoqing(College of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China;ShanghaiHengtong Photoelectric Science and Technology Co.,Ltd,Shanghai 201800,China;Wanjiang College,Anhui Normal University,Wuhu 241000,China)

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000 [2]上海亨通光电科技有限公司,上海201800 [3]安徽师范大学皖江学院,安徽芜湖241000

出　　处：《无线电通信技术》2019年第4期378-384,共7页Radio Communications Technology

基　　金：国家自然科学基金项目(61772287);安徽省高校自然科学基金项目(KJ2018A0311);安徽省自然科学基金项目(1908085QF279)

摘　　要：针对NOMA系统传输模型,提出了基于NOMA通信场景下的多用户调度策略,对非窃听中继和窃听中继2种场景分别进行研究分析,推导计算出2种场景下OMA与NOMA系统安全中断概率数学闭合表达式,并进行对比分析。分析和仿真结果表明通过增加主信道信噪比(SNR)和发送用户数目可以有效提高系统安全性能,分析表明同等情况下基于NOMA系统的安全中断概率总是低于OMA系统,并且这种优势随着主信道SNR的增加、窃听信道SNR的减小而更加显著。For NOMA system transmission model,this paper proposes a multi-user scheduling strategy in the NOMA communication scenario,studies and analyzes such two scenarios as non-eavesdropping and eavesdropping relay.The mathematical closed-form expressions of secrecy outage probability(SOP) of OMA and NOMA system are derived for these two scenarios.The analysis and simulation results show that the secrecy performance of the system can be effectively improved by increasing the SNR of primary channel and the number of users.The results also show that the SOP of NOMA system is always lower than that of the OMA system,and the advantage is more obvious as the SNR of primary channel increases and the SNR of eavesdropping channel decreases.

关 键 词：非正交多址接入 物理层安全 多用户调度 安全中断概率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]