天地一体化信息网络2025，Vol.6Issue(4)：96-102,7.DOI:10.11959/j.issn.1000-0801.2025042
卫星物联网通信中基于信道容量的高效编码LoRa传输方案
Efficient Coded LoRa Transmission Scheme Based on Channel Capacity in Satellite IoT Communication
摘要
Abstract
Considering the extremely low signal-to-noise ratio(SNR)issue in satellite internet of things(IoT)communications,an effi-cient coded LoRa transmission scheme based on channel capacity is proposed.First,the corresponding coded LoRa transmission sys-tem model is presented.Next,the hard/soft-decision values for non-coherent demodulation of coded LoRa signals are derived.Then,the channel capacity and achievable code rate of the coded LoRa system based on non-coherent demodulation are analyzed,resulting to the relationship between the bit SNR and ideal channel capacity,as well as approximate channel capacity.Finally,the achievable code rates of the coded LoRa system under different spreading factors is demonstrated by simulation,followed by the performance of the coded LoRa system based on ideal metric and approximate metric under different code rates(including the optimal achievable code rate).Tak-ing Turbo and Hamming codes as examples,the Turbo-LoRa transmission scheme exhibits significant performance advantages over the traditional Hamming-LoRa under the same conditions.The Turbo-LoRa with low code-rates based on ideal metric has a performance gain of about 1dB compared to the same Turbo-LoRa based on approximate metric,while the complexity of the former is much higher than that of the latter.These results have certain guiding significance for the reliable transmission of future satellite IoT.关键词
LoRa技术/非相干解调/信道容量/卫星物联网/6G通信Key words
LoRa technique/non-coherent demodulation/channel capacity/satellite IoT/6G communication分类
信息技术与安全科学引用本文复制引用
YU Zhongyang,YAN Yuqian,XU Hengzhou,ZHU Hai,GAO Jixun..卫星物联网通信中基于信道容量的高效编码LoRa传输方案[J].天地一体化信息网络,2025,6(4):96-102,7.基金项目
国家自然科学基金(No.62201198,No.62172457) （No.62201198,No.62172457）
河南省科技攻关项目(No.252102210230,No.252102211109)The National Natural Science Foundation of China(No.62201198,No.62172457),Henan Key R&D and Promotion Projects(No.252102210230,No.252102211109) （No.252102210230,No.252102211109）
