改进通信网络的GNSS-RTK高精度定位系统

The GNSS-RTK High-Precision Positioning System with Improved Communication Network

针对GNSS-RTK高精度定位系统受多径效应影响严重,且采用无线数据链路传输存在功耗高、覆盖面有限的问题,设计一个低功耗、高精度的定位系统是十分必要的。本文引入NB-IoT网络作为基准站和移动站之间的数据通信链路,使改进后的定位系统具有低功耗、广覆盖的特性;同时引入CEEMDAN算法,分离多径误差和仪器内部随机噪声,实现了高精度定位系统设计。实验结果表明,本系统的定位精度达到1cm,能够满足高精度定位需要。

The GNSS-RTK high-precision positioning system is seriously affected by the multipath effect,and the wireless data link transmission has the problems of high power consumption and limited coverage,so it is necessary to design a low power consumption and high-precision positioning system.In this paper,the NB IoT network is introduced as the data communication link between the base station and the mobile station,so that the improved positioning system has the characteristics of low power consumption and wide coverage;At the same time,CEEMDAN algorithm is introduced to separate the multipath error and the internal random noise of the instrument,thus high-precision positioning system is realized.The experimental results show that the positioning accuracy of the system reaches 1cm,which can meet the needs of high-precision positioning.