非理想条件下协作CR-NOMA的IoT网络性能分析  

Performance Analysis of IoT Networks with Cooperative CR-NOMA under Non-ideal Conditions

作　　者：薛鹏 朱芸灿 刘金昌 李美玲[1] XUE Peng;ZHU Yuncan;LIU Jinchang;LI Meiling(School of Electronics Information Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学电子信息工程学院,太原030024

出　　处：《电讯技术》2024年第12期2067-2074,共8页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(62001320);山西省科技创新人才团队专项(202304051001035);中央引导地方科技发展资金项目(YDZJSX2021A037);山西省回国留学人员科研项目(2021-133);山西省科技成果转化引导专项项目(202204021301055);山西省专利转化项目(202302003);山西省科研实践创新类项目(2023KY647)。

摘　　要：为了解决移动通信系统中的高延迟和覆盖盲点问题,提出了一种基于认知无线电-非正交多址接入(Cognitive Radio Non-orthogonal Multiple Access,CR-NOMA)的工业物联网网络。在认知网络中次用户采用解码转发(Decode and Forward,DF)和放大转发(Amplify and Forward,AF)两种辅助解码方式下,推导了主用户和次用户在完全串行干扰或不完全串行干扰两种终端状态下的中断性能。当用户间链路条件相同时,认知中继采用AF方式优于DF方式,且不完全串行干扰技术后系统残留干扰噪声的增大也会导致主用户和次用户的中断概率增大。研究还发现,各用户移动导致用户之间距离增大时,主用户和次用户的中断概率也会增大。To solve the problems of high latency and blind spots of signal coverage in mobile communication systems,the authors propose a cooperative cognitive radio non-orthogonal multiple access(CR-NOMA)based industrial Intert of Things(IoT)network.Users in cognitive networks are decoded using two auxiliary decoding methods,decode-and-forward(DF)and amplify-and-forward(AF).The interruption performance of the primary and secondary users for two terminal states,or completely successive interference cancellation(SIC)and incomplete successive interference cancellation(ipSIC),is derived.When the link conditions between users are the same,cognitive relaying with AF method is better than DF method,and the increase of ipSIC and system residual interference noise also leads to the increase of the interruption probability of the primary and secondary users.It is also found that the interruption probability of the primary and secondary users increases when the mobile user movement leads to the increase of the distance between users.

关 键 词：工业物联网 认知无线电 非正交多址接入 不完全串行干扰 

分 类 号：TN911.1[电子电信—通信与信息系统]