低地球轨道卫星星座地球固定足印模式覆盖域切换方法

齐晓鑫; 宋宝军; 李勋

doi:10.11959/j.issn.1000-436x.2024103

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低地球轨道卫星星座地球固定足印模式覆盖域切换方法

专题：低地球轨道卫星互联网 | 更新时间：2024-08-09

- 低地球轨道卫星星座地球固定足印模式覆盖域切换方法
- Coverage region switching method under earth-fixed footprint mode for LEO satellite constellation
- 通信学报 2024年45卷第7期页码：10-20
- 作者机构：
  
  空军工程大学防空反导学院，陕西西安 710100
- 作者简介：
  
  [ "齐晓鑫（1994- ），男，山西大同人，博士，空军工程大学讲师，主要研究方向为卫星网络组网技术。" ]
  [ "宋宝军（1982- ），男，河北唐山人，空军工程大学副教授、硕士生导师，主要研究方向为雷达信号处理。" ]
  [ "李勋（1987- ），男，陕西西安人，博士，空军工程大学讲师，主要研究方向为网络流量分析、网络测量、SDN等。" ]
- 基金信息：
- DOI：10.11959/j.issn.1000-436x.2024103
  中图分类号： TN92
- 收稿：2023-12-09，
  
  修回：2024-05-13，
  
  纸质出版：2024-07-25
- 稿件说明：
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齐晓鑫,宋宝军,李勋.低地球轨道卫星星座地球固定足印模式覆盖域切换方法[J].通信学报,2024,45(07):10-20.

QI Xiaoxin,SONG Baojun,LI Xun.Coverage region switching method under earth-fixed footprint mode for LEO satellite constellation[J].Journal on Communications,2024,45(07):10-20.
齐晓鑫,宋宝军,李勋.低地球轨道卫星星座地球固定足印模式覆盖域切换方法[J].通信学报,2024,45(07):10-20. DOI： 10.11959/j.issn.1000-436x.2024103.

QI Xiaoxin,SONG Baojun,LI Xun.Coverage region switching method under earth-fixed footprint mode for LEO satellite constellation[J].Journal on Communications,2024,45(07):10-20. DOI： 10.11959/j.issn.1000-436x.2024103.

摘要

在低地球轨道卫星星座中，当采用地球固定足印模式时，波束在覆盖域之间的切换会影响对地覆盖的仰角，进而影响通信质量。针对地球固定足印模式下的覆盖域切换问题，提出了一种覆盖域切换方法。首先，设计了覆盖域划分机制，使覆盖域拓扑保持规则性；然后，以最大限度地增大波束对地面的最小仰角为目标，设计了切换时刻选择机制和目标覆盖域选择机制。所提方法考虑了极轨星座和倾斜轨星座的差异，同时支持2种星座。以OneWeb和Telesat星座为仿真场景，验证了所提方法。仿真结果表明，所提方法能够有效增大波束对地面覆盖的最小仰角，从而有助于提升链路质量。

Abstract

In low earth orbit (LEO) satellite constellations

when earth-fixed footprint mode is used

the switching of beams between coverage regions affects the elevation angle of the coverage

which in turn affects the communication quality. A coverage region switching method was proposed to address the coverage region switching problem in earth-fixed footprint mode. Firstly

a coverage region division mechanism was designed to keep the coverage region topology regular. Then

a switching time selection mechanism and a target coverage region selection mechanism were designed with the objective of maximizing the minimum elevation angle of the beams. The proposed method takes the differences between polar and inclined orbit constellations into account and supports both constellations. The OneWeb and Telesat constellations are used as simulation scenarios to validate the proposed method. The simulation results show that the proposed method can effectively improve the minimum elevation angle of the beams

which helps to improve the link quality.

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Keywords

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