Performance Analysis of the Packet-Based PNT Service in NGSO Broadband Satellite Communication Systems

作     者：Xi Chen Qihui Wei Yafeng Zhan Linling Kuang Xi Chen;Qihui Wei;Yafeng Zhan;Linling Kuang

作者机构：National Information Science and Technologies Research CenterTsinghua UniversityBeijing100084China Department of Electronic EngineeringTsinghua UniversityBeijing100084China 

出 版 物：《中国通信:英文版》 (China Communications)

年 卷 期：2023年第20卷第9期

页      面：247-259页

核心收录：

学科分类：08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 

基　　金：the National Key Research and Development Program of China(2020YFB1804800) the National Natural Science Foundation of China(No.62071270) 

主　　题：6G non-terrestrial network NGSO satellite positioning performance analysis 

摘      要：Providing alternative PNT service to GNSS-challenged users will be an important function of next-generation NGSO broadband satellite communication ***,a packet-based PNT service architecture in NGSO broadband systems is proposed in which a primary satellite and selected assistant satellites work together to provide PNT service to requesting *** positioning performance bounds are mathematically formulated by rigorously analyzing the bounds constrained by different *** are conducted on different configurations of Walker Delta MEO constellations and Walker Star LEO constellations for corroboration,revealing the following:(1)Both MEO and LEO constellations achieve sub-meter-level positioning precision given enough satellites.(2)Compared to the GNSS Doppler-based velocity estimation method,the position advance based velocity estimation algorithm is more precise and applicable to the PNT service in NGSO broadband systems.(3)To provide PNT service to users in GNSS-challenged environments,the primary and each assistant satellite need only∼0.1‰of the time of one downlink beam.