低轨卫星网络接入与传输技术

摘要：针对低轨卫星网络空口传输特征，在地面5G NR体制的基础上利用智能化网络与轻量化终端间的协同，实现用户的广域无感接入与适变传输。梳理了低轨卫星网络空口传输关键技术，认为需要采用内生智能的方法辅助空口设计，从空口赋能AI和AI辅助空口两个方面构建完整闭环的研究体系，最后展望了未来低轨卫星网络的研究趋势。

关键词：低轨卫星网络；波形；多址；接入与传输；人工智能

Abstract: Through an analysis of the air interface transmission characteristics of low earth orbit (LEO) satellite networks, a method is proposed for achieving wide-area seamless access and adaptive transmission through the synergy between intelligent networks and lightweight terminals, built upon the terrestrial 5G NR framework. The key technologies for air interface transmission in LEO satellite networks have been systematically reviewed. It is believed that an endogenous intelligence approach should be employed to assist air interface design. The research framework is envisaged to be constructed as a complete closed loop, focusing on two main aspects: empowering AI through the air interface and utilizing AI to assist the air interface. Finally, future research trends in LEO satellite networks are anticipated.

Keywords: low earth orbit satellite networks; waveform; multiple access; access and transmission; artificial intelligence