无线电工程2024，Vol.54Issue(1)：41-46,6.DOI:10.3969/j.issn.1003-3106.2024.01.006
反向散射中基于载波索引的混合NOMA方案
Hybrid NOMA Scheme Based on Subcarrier Index Modulation in Backscatter
摘要
Abstract
The uplink of an environmental backscattering communication system based on NOMA in the power domain often completes user pairing through distance.The dual channel fading of the passive backscattering system makes the remote edge devices unable to meet the communication power demands or the minimum Signal-to-Interference-Noise Ratio(SINR)constraint for decoding.In order to solve the above problems,a hybrid uplink NOMA scheme of OFDM and OFDM with Index Modulation(IM)is proposed,which is composed of a tag modulation scheme and a reflection coefficient adjustment scheme.OFDM-IM provides better energy efficiency and enables devices with low power level to meet communication conditions.The Backscatter Devices(BD)flexibly selects OFDM or OFDM-IM according to the received power level,and superimposes them in the power domain.By adjusting the reflection coefficient to ensure the power difference of superimposed signals,the receiver uses the power level to perform multi-user detection.The experimental results show that the scheme can effectively improve the success rate of remote user decoding,and the increase in the number of decoding users improves the system capacity.关键词
反向散射/非正交多址接入/索引调制/多载波Key words
backscatter/NOMA/IM/multi-carrier分类
信息技术与安全科学引用本文复制引用
李世宝,陆锐..反向散射中基于载波索引的混合NOMA方案[J].无线电工程,2024,54(1):41-46,6.基金项目
国家自然科学基金(61972417)National Natural Science Foundation of China(61972417) （61972417）
