基于GLONASS频间偏差的GNSS时差监测方法研究  

Research on GNSS time offset monitoring based on GLONASS IFBs

作　　者：孔思嘉 谢维华 KONG Sijia;XIE Weihua(Beijing Satellite Navigation Center,Beijing 100089,China)

机构地区：[1]北京卫星导航中心,北京100089

出　　处：《全球定位系统》2020年第4期21-28,共8页Gnss World of China

摘　　要：为实现各导航系统的兼容与互操作,需要对各导航系统间的时间偏差进行实时监测.目前,全球卫星导航系统(GNSS)时差监测的主要方法是利用空间信号法进行GNSS时差监测.由于GLONASS系统频分多址的信号体制,导致GLONASS接收机频间偏差(IFB)的存在,GLONASS IFB会影响到GNSS-GLONASS的系统时差监测.为消除这一影响,本文提出了基于GLONASS IFB估计的GNSS时差监测方法,由仿真结果可知,利用该方法可以将GPS-GLONASS时差监测精度平均提高90%以上.To enhance the compatibility and interoperability among GNSSs,it is necessary to monitor system time offset among GNSSs.At present,the main method of GNSS time offset monitoring is Signal-in-Space Reception method.Because of the FDMA technique,GLONASS satellites have different signal frequencies.It leads to IFBs for both pseudorange and carrier phase observations.The GLONASS IFBs will influence the GNSS-GLONASS system time offset monitoring.To reduce the impact of GLONASS IFBs,this paper proposes a method of GNSS time offset monitoring with GLONASS IFBs estimated.The simulation result indicates the accuracy of GPS-GLONASS time offset can be improved by more than 90%on average.

关 键 词：GNSS 时差监测 空间信号法 GLONASS IFB 

分 类 号：TN967.1[电子电信—信号与信息处理]