一种低轨卫星通信的定时提前计算方法
A timing advance calculation method for Low Earth Orbit satellite communication
段相龙 1刘留 1周涛 1苏昭阳 1韩紫杰 1尹毅2
作者信息
- 1. 北京交通大学电子信息工程学院,北京 100044
- 2. 中国国家铁路集团有限公司,北京 100844
- 折叠
摘要
低轨(LEO)卫星网络作为地面网络的重要补充,是未来天地一体化网络的重要组成部分.由于LEO卫星的高移动速度以及星地通信的大传播距离造成了高传播时延,因此需要新的针对LEO卫星星地通信背景的上行链路的定时提前量(TA)的计算策略.本文基于LEO卫星的星地通信场景,介绍了 TA及其在协议中的规定,并针对LEO卫星的特点,提出一种LEO卫星通信的定时提前计算方法.通过仿真分析验证了所提方案的有效性,为LEO卫星星地通信系统的设计提供了参考.
Abstract
As an important supplement to the terrestrial network,the Low Earth Orbit(LEO)satellite network is an important part of the future earth-earth integrated network.However,due to the high moving speed of LEO satellites and the long propagation distance of satellite-ground communication,large propagation delay is caused,therefore a new calculation strategy for the Timing Advance(TA)of the uplink in the satellite-ground communication background of LEO satellites is needed.Based on the satellite-earth communication scenario of LEO satellite,TA and its provisions in the protocol are introduced firstly.Then,according to the characteristics of LEO satellite,a timing advance calculation method of LEO satellite communication is proposed.The effectiveness of the proposed scheme is verified by simulation analysis,which provides a reference for the design of satellite-earth communication system of LEO satellite.
关键词
低轨卫星/星地通信/定时提前量/计算方法/神经网络Key words
LEO satellite/space-ground communication/Timing Advance/calculation method/neural network引用本文复制引用
基金项目
国家自然科学基金(62341102)
中国国家铁路集团有限公司科技研发计划(N2023G060)
出版年
2024
国家科技期刊平台
NSTL
万方数据