车载组合导航系统中的分级地图匹配算法

本首先建立了用于车载导航的电子地图中道路网络的实体对模型，在研究GPS/DR定位误差分布的前提下，基于局部线性化思想，利用定位轨迹和电子地图道路网的相关性，实现了地图分级匹配计算，从而消除GPS/DR定位信息中的有偏误差。最后，在AutoCAD环境下用实验验证了上述算法。结果表明该算法模型简单，不仅可以提高车载导航系统的定位精度，而且能提供可视化的导航效果。

Gradation Mapmatching Algorithm in Vehicle Integrated Navigation System

Firstly,this paper constructs the modelof entitypartners of road network in digital map.Then,the feature of positioning error ofGPS/DR integrated navigation is discussed.Based on the thought of partial linearizationand the relativity between positioning traces and road networks,the gradation MapMatchingcalculation was realized and it removes the biased error of GPS/DR positioninginformation.In the end,the algorithm is tested under AutoCAD.The results show that thealgorithm stated here is easy to realize and can not only improve the positioningperformance of Vehicle Navigation System,but also provide a visual navigation effect.