多标签环境反向散射辅助非正交多址接入系统性能分析  

Performance analysis of multi-tag ambient backscatter assists non-orthogonal multiple access system

作　　者：黄海燕 张宁 梁琳琳 王春丽[1] 张学军[1] HUANG Hai-yan;ZHANG Ning;LIANG Lin-lin;WANG Chun-li;ZHANG Xue-jun(School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Cyber Engineering,Xidian University,Xi'an 710071,China)

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070 [2]西安电子科技大学网络与信息安全学院,西安710071

出　　处：《吉林大学学报(工学版)》2025年第1期347-354,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(62461032,62001359);兰州交通大学“天佑青年托举人才计划”项目;兰州交通大学重点研发项目(ZDYF2304)。

摘　　要：本文考虑多标签环境反向散射与非正交多址接入技术相结合的通信系统。首先,本文在多标签的基础上提出了一种最佳标签选择方案,即在基站与远用户之间放置的M个标签中选择出接收信噪比最大的标签进行传输,分析M个标签对远用户中断性能的影响;其次,在近用户端分析采用理想和非理想连续干扰消除对近用户中断性能产生的差异,推导了用户的精确和渐近中断概率及吞吐量表达式,并证明远用户和近用户均可以获得全分集阶数;最后,通过仿真验证了理论分析的正确性,得到了标签数量、非理想SIC的残余干扰系数和目标速率等关键参数对用户性能的影响,当标签数量M=5,信噪比γ=-28 dB时,其他参数保持不变,远用户的中断性能比单标签提升约10%。In this paper,we consider a communication system combining multi-tags ambient backscatter with non-orthogonal multiple access technology.First,on the basis of multi-tags,we propose an optimal tag selection scheme in which the best tag is selected for transmission among M tags placed between the base station and the far user,to analyze the effect of M tags on the far user outage performance.Also,the difference in the near user outage performance produced by using ideal and non-ideal successive interference cancellation is analyzed at the near user side.Then,exact and asymptotic outage probabilities and throughput expressions are derived for users,as well as it is proved that full diversity orders are available for the far and near users.Finally,the correctness of the theoretical analysis is verified by simulation,and the effects of key parameters such as the number of tags,residual interference coefficient of non-ideal SIC and target rate on user performance are obtained.When the number of tags M=5,the signal-to-noise ratio γ=-28 d B,under the same conditions with other parameters fixed,the outage performance of far users is improved by about 10%over single tag.

关 键 词：通信技术 环境反向散射 多标签 非正交多址接入 连续干扰消除 

分 类 号：TN925[电子电信—通信与信息系统]