摘要
为探索北斗三号全球卫星导航系统(BDS-3)新信号对于全球导航卫星系统(GNSS)多系统定位的作用以及动态环境下BDS-3新信号的性能,通过多路径和信噪比参数对比分析BDS-3新旧信号在静态开阔环境和动态复杂环境的差异性,从定位精度、固定率、首次固定时间以及平均卫星数4个方面综合评估融合BDS-3新信号的多系统精密单点定位(PPP)模糊度固定性能.结果表明:动态环境下,BDS-3新信号在抗多路径等噪声方面更有优势,多路径等伪距观测噪声仅为旧信号的1/2,载波信噪比在动态模式下更稳定且信号强度更高;融合BDS-3新信号后,多系统PPP固定解的定位性能得到提升,相比于融合BDS-3旧信号,东方向定位精度提升10%~20%,模糊度固定率提升至90%以上.
In order to study the performance of new navigation signal of BeiDou-3 navigation satellite system(BDS-3) in dynamic positioning mode for global navigation satellite system(GNSS). Multipath error and signal-to-noise ratio were calculated and compared between before and after adding new navigation signal in open static and complex dynamic environment. The statistics information about positioning accuracy, fixing rate, time to first fix and average number of satellites were used to evaluate the performance of precise point positioning(PPP) ambiguity resolution with BDS-3 new navigation signal. The results show that BDS-3 new signal has advantages in higher signal-to-noise ratio and less multipath error under dynamic positioning environment. The pseudorange noises with multipath of new signal is only half as large as that of old signal. After combining BDS-3 new navigation signal, the performance of multi-system PPP fixed solution has been improved, especially ambiguity fixed rate. The position accuracy in an east direction is increased by 10% to 20%. The ambiguity fixed rate is improved to more than 90%.
作者
李增科
陈昭冰
刘赞
高井祥
赵龙
徐磊
LI Zengke;CHEN Zhaobing;LIU Zan;GAO Jingxiang;ZHAO Long;XU Lei(School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2022年第6期1222-1231,共10页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(41874006,41974026)。
