太赫兹科学与电子信息学报2025，Vol.23Issue(5)：434-445,12.DOI:10.11805/TKYDA2024170
基于低轨卫星物联网的差分LoRa体制性能分析
Performance analysis of differential LoRa scheme for LEO satellite-based Internet of Things
摘要
Abstract
Low-Earth Orbit(LEO)satellites have the characteristic of global coverage.The Long Range(LoRa)network based on LEO satellite Internet of Things(IoT)has become a research hotspot.To address the floor effect issue of LoRa modulation schemes in LEO satellite channels,two differential LoRa demodulation strategies are proposed for the differential LoRa modulation scheme.Firstly,a closed-form expression for the Symbol Error Rate(SER)is derived under the LEO satellite channel with dynamic Doppler frequency shift,illustrating the floor effect issue of LoRa modulation in LEO satellite channels.Subsequently,the derived closed-form SER expression is validated using Monte Carlo simulations,and the Bit Error Rate(BER)performance of LoRa modulation and the proposed differential LoRa modulation is evaluated.Simulation results show that compared with the LoRa modulation scheme,differential LoRa modulation and the proposed differential LoRa demodulation strategies can effectively improve the BER performance of LEO satellite IoT under dynamic Doppler frequency offset scenarios.关键词
物联网/低轨卫星物联网/长距离/差分LoRa调制/误符号率Key words
Internet of Things(IoT)/Low Earth Orbit(LEO)satellite-based IoT/Long Range(LoRa)/differential LoRa modulation/Symbol Error Rate(SER)分类
信息技术与安全科学引用本文复制引用
钱铭,洪涛,张更新..基于低轨卫星物联网的差分LoRa体制性能分析[J].太赫兹科学与电子信息学报,2025,23(5):434-445,12.基金项目
国家自然科学基金资助项目(U21A20450 （）
62171234 （）
61971440) （）
国家重点研发计划资助项目(2022YFB2902600) （2022YFB2902600）
江苏省前沿引领技术基础研究专项资助项目(BK20192002) （BK20192002）
