基于NTN的手机直连卫星定位技术  

Non-Terrestrial Network Based Positioning Technologies for Direct-to-Satellite Service

作　　者：孙晓南 周世东[2] 康绍莉 SUN Xiaonan;ZHOU Shidong;KANG Shaoli(C-ICT Mobile Communication Technology Co.,Ltd.,Beijing 100083,China;Tsinghua University,Beijing 100084,China)

机构地区：[1]中信科移动通信技术股份有限公司,北京100083 [2]清华大学,北京100084

出　　处：《天地一体化信息网络》2024年第3期35-43,共9页Space-Integrated-Ground Information Networks

基　　金：国家重点研发计划资助项目(No.2022YFB2902600)。

摘　　要：随着无线通信技术的飞速发展,定位技术正经历从专用导航卫星系统向通信系统辅助定位,甚至独立定位的方向转变。国际标准化组织3GPP自R18开展了基于5G NTN的定位技术研究,推进通信导航一体化发展。考虑到终端可见的卫星数量,目前在3GPP中研究的主要是单星定位技术,存在收敛慢、定位精度低等不足。随着低轨巨型星座的发展,终端未来可见的卫星数目越来越多,因此多星定位成为可能,并相对于单星定位具有收敛快、几何布局好、精度高等优势。针对5G NTN体制的手机直连卫星定位技术进行研究,提出多种适合多星定位的算法,分析影响定位性能的关键因素并开展定位性能仿真评估。With the rapid evolution of wireless communication technologies,positioning technologies are undergoing a transformation from dedicated navigation satellite systems towards communication system-assisted positioning and even standalone positioning.The International Telecommunication Union's 3GPP,since Release 18,has embarked on researching 5G Non-Terrestrial Network(NTN)po‐sitioning technologies,fostering the integration of communication and navigation.Considering the limited visibility of satellites to ter‐minals,the primary focus of current 3GPP research lies in single-satellite positioning technology,which suffers from drawbacks such as slow convergence and low accuracy.However,with the emergence of low-Earth orbit mega-constellations,terminals will access to an increasing number of visible satellites in the future,rendering multi-satellite positioning feasible.Compared to single-satellite position‐ing,multi-satellite positioning offers advantages such as faster convergence,improved geometric configurations and higher accuracy.This paper delves into the research of positioning technologies for Direct-to-Satellite Service(D2SS)within the 5G NTN framework,proposing various multi-satellite positioning algorithms,analyzing the critical factors influencing positioning performance,and conduct‐ing simulation assessments of positioning performance.

关 键 词：通信导航一体化 多星定位 TDOA Multi-RTT 多普勒定位 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]