安卓智能手机GNSS数据筛选方案研究

Research on GNSS Data Screening Scheme of Android Smartphone

通过设置两种不同的遮挡环境,对测地型接收机和智能手机静态采集的测量数据进行对比分析。结果表明,智能手机可接收部分非直射卫星信号,受多路径效应干扰明显。根据非直射卫星信号的数据特征设计智能手机原始GNSS数据筛选方案,静态定位实验结果表明,应用数据筛选方案能够显著提升智能手机在复杂环境下的定位精度。智能手机SPP定位算法和RTK定位算法平面方向的定位精度可提升20%~40%,高程方向的定位精度可提升30%~60%。

We analyze the static data collected by the geodetic receiver and smartphone by setting up two different occlusion environments.The results show that the smartphone receives some NLOS signals,and the satellite signals are obviously interfered by multipath effects.According to the characteristics of the NLOS signal and original GNSS measurement information of the smartphone,we design a scheme for screening the original GNSS data of the smartphone.The results of static positioning experiments show that the application of data screening scheme can significantly improve the positioning accuracy of smartphones in urban environment.The positioning accuracy of the smartphone SPP algorithm and the RTK positioning algorithm in the plane direction can be improved by 20%-40%,and the positioning accuracy in the elevation direction can be improved by 30%-60%.