低成本单频精密单点定位在城市导航定位中的应用

Application of Low-Cost Single-Frequency Precise Point Positioning in Urban Navigation and Positioning

提出了采用单频精密单点定位(precise point positioning,PPP)技术实现基于u-blox的城市区域亚米级导航定位技术服务模式,该模式完全取代精度相对较低的标准单点定位(standard point positioning,SPP)技术,同时相比于网络RTK(real-time kinematic)技术具有占用资源更少、不受用户数量限制等优点。单频PPP技术实现包括数据的接收与解码,位置解算和实时位置信息地图显示功能。通过城市密集区域车载实验,E、N、U 3方向定位精度分别为0.54 m、0.61 m和1.95 m,说明单频PPP技术在可以稳定提供亚米级导航定位服务。

This paper proposes a single-frequency GNSS precision single point positioning(PPP)technology to realize the urban area sub-meter navigation positioning technology service based on u-blox,which completely replaces the pseudosingle point positioning(SPP)with relatively low precision.Compared with the network RTK technology,the single-frequency PPP technology has the advantage of less resources and no limit on the number of users.Its implementation includes data reception and decoding,position resolution and real-time location information map display.Through the in-vehicle experiments in urban dense areas,the positioning accuracies in the east,north and up directions are 0.54 m,0.61 m and 1.95 m,respectively,which indicate that the single-frequency PPP technology can provide stable sub-meter navigation and positioning services.