摘要
由于非正交多址接入(Non-orthogonal Multiple Access,NOMA)能够显著提升系统的频谱资源利用率,在下一代移动通信中得到广泛应用。对NOMA环境下多中继协作网络的最优中继选择方案和系统安全性能进行了分析和讨论,其中包含窃听者仅窃听中继和窃听者同时窃听中继及源节点这2种情况下的系统安全性能表现,并与相同场景下正交多址接入(Orthogonal Multiple Access,OMA)网络进行了对比。最终的理论分析和仿真结果表明,在所提出系统模型中,当信道条件相同时,NOMA网络总能取得相较于OMA网络更好的安全性能,同时随着系统中继节点数目的增多,NOMA网络在物理层安全性能上获得更大的优势。
Non-orthogonal multiple access(NOMA)can significantly improve spectrum resource utilization.It will be widely used in the next generation of mobile communications.This paper analyzed and discussed the optimal relay selection scheme and system security performance of multi-relay cooperative network in NOMA environment,including the model of eavesdroppers only eavesdropping on relays and eavesdroppers eavesdropping on both relays and source nodes at the same time,and compares it with the orthogonal multiple access(OMA)network in the same scenario.For comparison,the NOMA network can always obtain better security performance than the OMA network under the same system model.And with the increase of the number of system relay nodes,NOMA network will gain greater advantages in physical layer security performance.
作者
冯友宏
李琦琦
杨志
FENGYouhong;LI Qiqi;YANG Zhi(School of Physics and Electronic Information,Anhui Normal University,Wuhu 241002,China)
出处
《无线电通信技术》
2020年第2期186-191,共6页
Radio Communications Technology
基金
国家自然科学基金资助项目(61671252)
安徽省自然科学基金资助项目(KJ2018A0311)~~
关键词
物理层安全
协作中继
非正交多址
中断概率
physical layer security
cooperative relay
non-orthogonal multiple access
outage probability
