智能手机虚拟格网伪距差分定位方法研究

Research on pseudorange differential positioning method of virtual grid of smartphone

针对智能手机全球卫星导航定位系统(GNSS)观测数据质量差、定位精度低的问题,该文提出了基于多普勒平滑的格网伪距差分算法。首先对观测数据进行分析、粗差剔除,再利用多普勒观测值对伪距进行平滑,最后利用虚拟格网伪距观测值改正相关误差进行定位。结果表明:经过手机观测值质量控制,利用多普勒观测值平滑伪距后进行虚拟格网伪距差分,可以得到平面优于1.5 m,垂直优于3 m的定位结果。

For the problems of poor quality of global navigation satellite system(GNSS) observation data and low positioning accuracy of smartphones, this paper proposed a grid pseudorange difference algorithm based on doppler smoothing. First, the observation data was analyzed and the gross error was eliminated. Then, the Doppler observations were used to smooth the pseudorange, and finally the virtual grid pseudorange observations were used to correct Related errors. The results showed that after the quality control of the mobile phone observations, and using the Doppler observations to smooth the pseudorange and then perform the virtual grid pseudorange difference, you could get a positioning result that was better than 1.5 m in plane and better than 3 m in vertical.