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 co...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.展开更多
基金supported by ZTE Industry-UniversityInstitute Cooperation Funds under Grant IA20230720009the Fundamental Research Funds for the Central Universities,the National Natural Science Foundation of China under Grants 62071194,62471194,and 62302185China Postdoctoral Science Foundation under Grants 2023M731196 and 2024T170305.
文摘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.
