智能手机GNSS标准定位性能与精度分析

Analysis of GNSS Standard Positioning Performance and Precision of Smartphone

GNSS接收机定位精度高,但是体积大不便于日常生活的使用。智能手机体积小、便于携带,并内置定位芯片可以为用户进行必要的位置服务。本文利用双频手机小米Mi8和测量型接收机Trimble NetR9在相同环境下进行同步观测。对两者的GNSS原始观测值的质量进行对比分析,通过Android Studio开发平台设计软件实现原始数据的获取和定位解算。结果表明,智能手机的定位结果可以达到水平方向3 m~13 m的定位精度。智能手机的GNSS原始观测值质量不及测量型接收机。它的信噪比更低,多路径影响更大。这是由于其内置天线的设计造成的,但其结果可以满足日常生活的需要,在民用领域有良好的应用前景。

The GNSS receiver has high positioning accuracy,but its large size is not convenient for daily use.Smart phones are small in size,easy to carry,and have a built-in positioning chip that can provide users with necessary location services.This paper uses the dual-frequency mobile phone Xiaomi Mi8 and the survey receiver Trimble NetR9 to perform simultaneous observations in the same environment,compares and analyzes the quality of the original GNSS observations of the two,realizes the result of positioning and acquisition of the original data through the Android Studio development platform design software.The results show that the positioning result of the smart phone can reach a positioning accuracy of 3-13m in the horizontal direction.The quality of the original GNSS observations of smartphones is not as good as that of survey receivers.Its signal-to-noise ratio is lower,and the impact of multipath is greater.This is caused by the design of its built-in antenna,but the result can meet the needs of daily life,and it has a good application prospect in the civilian field.