面向低轨卫星的星地信道特性研究与仿真  

Research and Simulation of Satellite-Ground Channel Characteristics for LEO Satellites

作　　者：苏昭阳 刘留[1] 郭志斌[2] 张嘉驰 周涛[1] SU Zhaoyang;LIU Liu;GUO Zhibin;ZHANG Jiachi;ZHOU Tao(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;Intelligent Network Innovation Center,China United Network Communications Co.,Ltd.,Beijing 100048,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044 [2]中国联合网络通信有限公司智网创新中心,北京100048

出　　处：《无线电通信技术》2023年第5期866-874,共9页Radio Communications Technology

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2023G060);国家自然科学基金(62341102)。

摘　　要：随着5G的应用与6G的研究,构建空天地一体化网络已经成为未来通信系统的发展方向。低轨(Low Earth Orbit,LEO)卫星网络可以提供大容量、低时延、广覆盖的通信能力,是未来天基网络的重要组成部分。然而星地信道传播距离长,电磁环境复杂,其传播特性与地面蜂窝网络有着很大不同。介绍了目前低轨卫星关于星地链路信道的标准化进展,分析了影响星地链路信道特性的因素及计算方法。在仿真平台上利用Starlink卫星数据对星地链路传播中的各种损耗进行了仿真,为低轨卫星星地链路设计提供了参考。With the application of 5G and the research of 6G,building an integrated network between space and ground has become the development direction of future communication systems.The Low Earth Orbit(LEO) satellite network can provide the communication capability of large capacity,low delay and wide coverage,which is an important part of the future space-based network.However,the satellite-ground propagation distance is long,and the electromagnetic environment is complex.The propagation characteristics are greatly different from those of terrestrial cellular networks.Firstly,the standardization progress of satellite-ground channel for LEO satellites is introduced.Secondly,the factors and calculation methods which affect the satellite-ground channel characteristics are analyzed.Finally,various fading of the satellite-ground propagation is simulated based on Starlink satellite data on a simulation platform,providing reference for the design of LEO satellite-ground communication system.

关 键 词：低轨卫星 信道 标准化 大尺度衰落 小尺度衰落 

分 类 号：TN927.2[电子电信—通信与信息系统]