摘要： 目前GPS的定位技术已经比较成熟，然而GPS正常工作时需要4颗可见卫星。该文提出了一种基于高精密数字地图的GPS双星定位系统，结合航位推算系统进行组合导航，对组合导航的输出信息综合滤波。试验证明，该算法增强了车载导航系统在城市复杂环境中的适应性，提供了满足要求的定位精度。

关键词: 全球定位系统, 双星定位, 数字地图, 航位推算系统, 卡尔曼滤波器

Abstract: While GPS is practical currently, it needs more than 4 observed GPS satellites to work. This paper presents an integrated navigation system based on the information provided by digital map, including two-satellite positioning based on the information provided by the digital map and DR system and its filtering algorithm. Experiments show that the integrated navigation system can provide precise positioning result and enhance the adaptability of vehicles in the complex environment of cities.

Key words: GPS, Two-satellite positioning, Digital map, Dead reckoning system, Kalman filter

中图分类号: 

• TP391