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卫星移动通信系统是利用卫星作为中继,实现区域乃至全球范围的移动通信的系统。在系统通信过程中,一个很重要的方面是无线链路的频率同步。本文首先介绍了卫星移动通信系统及其频率偏差的原因,接着讨论了地面终端所采用的频率同步技术,同时还讨论了特殊的机载终端所采用的频率同步技术,最后总结了卫星移动通信系统的频率同步机制。
Satellite mobile communication system is the use of satellites as a relay, to achieve regional and global mobile communications system. A very important aspect of system communication is the frequency synchronization of wireless links. This paper first introduces the reasons of satellite mobile communication system and its frequency deviation, and then discusses the frequency synchronization technology used by terrestrial terminals, and also discusses the frequency synchronization technology used by special airborne terminals. Finally, it summarizes the characteristics of satellite mobile communication system Frequency synchronization mechanism.