智能手机广域差分实时定位分析

Analysis of wide area differential real-time positioning of smartphone

针对智能手机GNSS观测数据质量差无法满足高精度定位需求的问题,该文首先分析了智能手机的数据质量,在此基础上提出了基于多普勒平滑伪距的广域差分方法,提升了智能手机实时定位的精度。实验表明:静态模式下,广域差分定位和多普勒平滑伪距广域差分定位相比伪距单点定位平面分别为47.7%、64.4%,高程方向分别提高55.2%和68.9%;动态模式下,直行时平面可达1.5 m,转弯时精度变差,约为2.5 m。

Aiming at the problem that the smart phone couldn’t meet the requirements of high-precision positioning with the poor quality of GNSS observation,the data quality of the smart phone was analyzed,on which basis,a wide-area difference method based on Doppler smooth pseudo-distance was proposed,which improved the high-precision positioning of real-time positioning of smart phones.The results showed that in the static mode,compared with the pseudorange single point positioning,the wide area differential positioning and wide area differential with Doppler smooth pseudorange horizontal accuracy were improved by 47.7%and 64.4%respectively,and the vertical accuracy were improved by 55.2%and 68.9%respectively;In dynamic mode,the horizontal accuracy was up to1.5 m when going straight,and the accuracy becomedworse when turning,about 2.5 m.