天地一体化信息网络低轨移动及宽带通信星座发展设想

doi:10.11959/j.issn.1000-0801.2017334

Abstract

Abstract:

With the extension of global internet and IoT (internet of things),LEO (low earth orbit) communication constellation which can achieve seamless coverage of the world including the two poles once again meets the opportunity for development.An innovative scheme of LEO mobile and broadband internet constellation was proposed after analyzing the characteristics of typical foreign constellations and combining with Science and Technology Innovation 2030 Major Project:Space Integrated Ground Network.Development suggestions that can lay the foundation for relevant research and system construction were presented.

Key words: LEO constellation, mobile satellite communication, satellite internet constellation

CLC Number:

TN91

Chenhua SUN,Yongwei XIAO,Weisong ZHAO,Po ZHOU. Development conception of space-ground inteyrated information network LEO mobile and broadband internet constellation[J]. Telecommunications Science, 2017, 33(12): 43-52.

Figures/Tables 9

References 13

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参数项	一代Iridium系统	二代Iridium系统
轨道类型	近极轨道、倾角86.4°
覆盖能力	实时全球无缝覆盖
天线及波束数量	L频段相控阵天线3副，每副16个波束；2副可移动	L频段相控阵天线1副，48波束；
	Ka频段馈电链路天线，每副1个波束；	2副可移动Ka频段馈电链路天线，每副1个波束；
	4副Ka频段星间链路天线	4副Ka频段星间链路天线
星间链路配置	同轨两条，邻轨两条
使用频段	用户链路L频段，馈电链路和星间链路Ka频段
载荷功能配置	以L频段移动通信载荷为主	在一代基础上，增加Ka宽带、空间气象监视、ADS-B、导航增强等载荷
L频段用户速率	最高128 kbit/s	最高1.5 Mbit/s
Ka频段的用户速率	不详	最高8 Mbit/s
卫星重量	约680kg	约800kg
发射方式	一箭一星	一箭多星（一箭十星）

参数项	一代ORBCOMM系统	二代ORBCOMM系统
卫星数量	在轨24颗	在轨16颗
覆盖	全球可达覆盖
轨道类型及高度	6个倾斜圆轨道	在一代基础上，新增赤道圆轨道轨道高度975km
	4个倾角45°（高度815km）
	1个倾角70°（高度740km）
	1个倾角108°（高度785~875km）
星间链路配置	无
载荷功能配置	以通信传输载荷为主	在一代基础上增加AIS载荷
卫星重量	约45kg	约140kg
业务类型	双向短数据传输	短数据传输、AIS数据
链路速率	用户链路速率：	由于星载天线增益和功率配置提升，用户链路速率提升4倍以上
	2.4 kbit/s（上行）/4.8 kbit/s（下行）
	馈电链路速率：57.6 kbit/s
发射方式	不详	一箭多星

特征参数项	一代系统（在轨）	二代系统（计划）^[5]
卫星数量及轨道面数	已部署12颗	正在建造中
覆盖	南北纬45°	南北纬50°
轨道类型及高度	中轨、8 062km	不详
星间链路配置	无
波束配置	单星10个用户波束，2个馈电波束，机械可调	系统提供波束大于3万个，波束覆盖灵活可调
吞吐量	单星12Gbit/s，每波束1.2Gbit/s	系统最高可达数十Tbit/s
卫星重量	700kg（每颗）	不详

Development conception of space-ground inteyrated information network LEO mobile and broadband internet constellation

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