基于太阳周期特性的低轨卫星通信信道建模  

Channel modeling of the LEO satellite communication based on the characteristics of the solar cycle

作　　者：吴桐 张登越 刘明洋 龚险峰[1] 李雄飞[1] 惠腾飞[1] WU Tong;ZHANG Dengyue;LIU Mingyang;GONG Xianfeng;LI Xiongfei;HUI Tengfei(China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,陕西西安710000

出　　处：《电子设计工程》2024年第3期65-68,73,共5页Electronic Design Engineering

基　　金：国家民用航天技术预先研究项目(Y20-MH-01)。

摘　　要：针对低轨卫星星地通信时,通信信道中复杂的地球大气状况,提出了基于太阳周期特性的低轨卫星通信信道模型。该模型利用了地球电离层电子密度、对流层粒子密度的统计学特征,统一考虑了电离层和对流层的幅度闪烁和多普勒扩展效应,引入了太阳周期活动因素导致的信道模型修正系数,提高了信道模型的适用范围。通过仿真分析,该模型能够反映不同太阳周期活动下,低轨卫星通信信道对通信信号的影响,为低轨卫星大规模部署后的通信测试和使用提供了理论基础。When communicating through low earth orbit satellites,the complex earth atmosphere of the communication channels is influential.In this case,a low earth orbit satellite communication channel model based on the characteristics of the solar cycle is proposed.This model uses the statistical characteristics of the ionosphere electronic density and the troposphere electronic density,considering the amplitude scintillation and Doppler spread of the ionosphere and the troposphere in low earth orbit satellite communication,introducing the channel model correction coefficient caused by the solar cycle activity and improving the scope of the channel model.Through simulation analysis,this model can reflect the impact of low earth orbit satellite communication channels on communication signals in different solar cycles,which provides the theoretical foundation for the communication testing and use of the wide⁃ranging application of low earth orbit satellites.

关 键 词：幅度闪烁 多普勒扩展 低轨卫星 通信信道建模 

分 类 号：TN911.7[电子电信—通信与信息系统]