BDS-3多频点伪距单点定位性能研究

针对目前有关北斗三号系统伪距单点定位研究较少，未对三号系统多个频点的定位性能进行对比分析的现状，本文利用实测数据对三号系统多个频点的定位性能进行了研究，并联合BDS-2、Galileo进行了同频伪距单点定位试验，统计分析了组合定位多个频点的同频定位结果。试验结果表明：目前三号系统单独定位能力有限，不适合单独定位；BDS-3/Galileo同频组合定位可以弥补BDS-3新频点单频定位时卫星个数不足、数据不完整导致的定位精度过差的情况，同时能够提高Galileo的定位精度；BDS-2/3的B3I频点与BDS/Galileo组合的B2b频点的定位精度均与GPS的L1频点的定位精度相当。

Study on the performance of BDS-3 multi-frequency pseudo-range single point positioning

Currently, the study on BDS-3 pseudo-range single point positioning (SPP) is insufficiency and there are no comparative analyses about the results of multi-frequency SPP in BDS-3. In this paper, the performance of multi-frequency SPP in BDS-3 are analyzed by using the measured data. In addition, the same frequency SPP experiment of the combination with BDS-2, Galileo are carried out in this paper to analyze the results of the same frequency combination of multi-frequency SPP. The experimental results show that the BDS-3 is unsuitable to positioning independently due to its limited positioning ability at present. The same frequency SPP of the combination BDS-3/Galileo can compensate the poor positioning accuracy caused by the inadequate number of satellites (NSAT) and incomplete data in BDS-3 new frequency SPP, and improve the SPP accuracy of Galileo. The positioning accuracy of the frequency B3I in BDS-2/3 and the frequency B2b in BDS/Galileo are similar to that of the frequency L1 in GPS.