Design and Implementation of NOMA Backscatter Communication with Low-Precision Oscillators  

作　　者：Kun Zhang Zhongye Cao Huixin Dong Zhiqing Luo Luanjian Bian Wei Wang 

机构地区：[1]School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,China [2]ZTE Corporation,Shenzhen 518057,China

出　　处：《Journal of Communications and Information Networks》2024年第3期286-295,共10页通信与信息网络学报（英文）

基　　金：supported by ZTE Industry-UniversityInstitute Cooperation Funds under Grant IA20230720009;the Fundamental Research Funds for the Central Universities,the National Natural Science Foundation of China under Grants 62071194,62471194,and 62302185;China Postdoctoral Science Foundation under Grants 2023M731196 and 2024T170305.

摘　　要：Recent years have witnessed increasing demands for the large-scale deployment of Internetof-things(IoT)devices.Backscatter technologies are promising to meet these demands with the notable low power consumption and cost.However,the conventional designs of backscatter prioritize energy efficiency at the cost of multiple access schemes with low spectral efficiency,which hinders its large-scale deployments.In this paper,we propose a new non-orthogonal multiple access backscatter(NOMA-Backscatter)system to meet high spectral-efficiency requirement.We implement the NOMA-Backscatter system for the first time with resource-constrained low-cost and low-power hardware and eliminate the affects of unstable oscillators during the successive interference cancellation(SIC)demodulation process in real world.Results demonstrate that NOMA-Backscatter can achieve 1.38 Mbit/s throughput with 200%tag load,and the spectral efficiency is 1.73×higher than state-of-the-art backscatter systems.

关 键 词：backscatter communication NOMA spectral efficiency multiple access 

分 类 号：TN92[电子电信—通信与信息系统]