手机直连低轨卫星链路预算分析  

Link Budget Analysis of LEO Satellite-Direct-to-Smartphone

作　　者：刘硕 钱梦媛 万军 丁文慧 Liu Shuo;Qian Mengyuan;Wan Jun;Ding Wenhui(China Academy of Information and Communications Technology,Beijing 100083,China;China Academy of Electronics and Information Technology,Beijing 100041,China;Innovation Center for Satellite Communication System,Beijing 100083,China)

机构地区：[1]中国信息通信研究院,北京100083 [2]中国电子科技集团公司电子科学研究院,北京100041 [3]国家航天局卫星通信系统创新中心,北京100083

出　　处：《信息通信技术》2024年第5期7-11,25,共6页Information and communications Technologies

基　　金：民用航天技术预先研究项目(D030101)。

摘　　要：近年来,全球都在加速发展以低轨卫星为主的卫星互联网星座,手机直连卫星作为卫星互联网的重点应用之一,将卫星互联网的应用场景从垂直行业逐渐拓展到大众消费领域,成为目前发展的热点。链路预算分析是手机直连低轨卫星应用的技术基础,通过对整个链路的计算,可以相互推算应用需求与系统能力。文章介绍国内外手机直连卫星系统的发展现状和三条主流的技术路线,分析手机直连低轨卫星的链路预算,通过理论计算研究得出后续手机直连低轨卫星的研究重点在于提高卫星接收天线的增益,建议采用相控阵天线和多波束成形技术来实现。In recent years,the development of satellite Internet constellations dominated by LEO satellites is accelerated in the world.As one of the key applications of satellite Internet,the Satellite-Direct-to-Smartphone has gradually expanded the application scenarios of satellite Internet from vertical industries to the field of mass consumption,which has become the hot spot of current development.The link budget analysis is the technical foundation for LEO Satellite-Direct-to-Smartphone applications.By calculating the entire link,application requirements and system capabilities can be mutually inferred.This article introduces the current development status and three mainstream technical routes of Satellite-Direct-to-Smartphone systems at home and abroad,analyzes the link budget of LEO Satellite-Direct-to-Smartphone systems.Through theoretical calculations,it is concluded that the focus of future research on Satellite-Direct-to-Smartphone systems is to improve the gain of satellite receiving antennas.It is recommended to study phased array antennas and multi-beam forming technologies.

关 键 词：卫星通信 手机直连卫星 链路预算 非地面网络 

分 类 号：TN927.2[电子电信—通信与信息系统]