导航卫星发射端多径的高精度测量技术  

High Precision Measurement of Multipath for Emission Platform of Navigation Satellite

作　　者：郑长刚 黄智刚[1] 康成斌[3] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100011 [2]北京市第十三中学,北京100009 [3]中国空间技术研究院,北京100094

出　　处：《电讯技术》2016年第2期145-150,共6页Telecommunication Engineering

摘　　要：针对国内外学者关于星体是导致"北斗"卫星码载波偏差随观测仰角存在相关性的主要原因的怀疑,提出了一种导航卫星发射端星体多径的高精度测试方法。利用连续频率调制信号的时域合成,获得窄时域脉冲,通过时域窗函数截取多径信号,从而获得多径的高精度延时和幅度。理论分析和试验验证表明:所提方法简单有效,获得了较高的时域分辨性能和测量精度,由此得出了导航卫星星体多径不是产生码载波偏差主要原因的结论。In view of the scholars’ review that satellite is the main cause of correlation between divergences of code-carrier of BD satellites( BDS) and observation angle,a high precision method of measuring mul-tipath caused by satellite is presented. This method gets narrow time pulse by using continous frequency modulated signal,and acquires interested multipath signal by time domain window function,in order to ob-tain the high precision time delay and intensity of multipath signals. By theoretical analysis and test verifi-cation,the method is proved to be simple and effective,and high performances of time domain distinguish-ment and measurement precision are achieved. Based on the method, the conclusion is drawn that mul-tipath of satellite is not the cause of the divergences of code-carrier.

关 键 词：导航卫星 发射端 多径测量 码载波偏差 

分 类 号：TN966[电子电信—信号与信息处理]