Research on several key technologies of satellite Internet

被引：0
|
作者：
Zhang, Gengxin [1 ,2 ]
Wang, Yunfeng [1 ,2 ]
Dign, Xiaojin [2 ,3 ]
Hong, Tao [1 ,2 ]
Liu, Ziwei [1 ,2 ]
Zhang, Chen [1 ,2 ]
机构：
[1] College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing,210003, China
[2] Institute of Satellite Communication, Nanjing University of Posts and Telecommunications, Nanjing,210003, China
[3] School of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing,210003, China
来源：
Tongxin Xuebao/Journal on Communications | 2021年 / 42卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Orbits - Earth (planet) - Geostationary satellites - Communication satellites - Network architecture;
D O I：
10.11959/j.issn.1000-436x.2021156
中图分类号：
学科分类号：
摘要：
Satellite Internet has the ability of global seamless coverage, which will be an important part of the future land-sea-air-space integrated network. Firstly, the architecture of satellite Internet was discussed, which included the general composition of the system, networking mode, working process, etc. Secondly, the methods of modeling broadband and narrowband traffic were proposed to extract the uneven space-time distribution characteristics of traffic for satellite Internet. Then, the co-frequency interference of spectrum-sharing was analyzed, showing that there would be more serious co-frequency interference among different non-geostationary satellite orbit (NGSO) constellations in the future. Next, the schemes of both beamforming design for low earth orbit satellite and beam-hopping design for high orbit satellite were explored, which could significantly improve the system capacity through efficient mining of space-domain resources. Finally, the development prospect of several technologies of satellite Internet were given. © 2021, Editorial Board of Journal on Communications. All right reserved.
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