一种基于车辆航向角的优化加权卫星定位方法

An Optimized Weighted Satellite Positioning Method Based on Vehicle Heading

针对城市道路两侧遮挡环境影响车载导航定位性能的问题,提出一种利用车辆航向角的优化加权卫星定位算法。算法结合城市道路特点,根据车辆行进方向和卫星几何分布情况以及卫星信号的载噪比构建加权模型,有效降低了两侧遮挡环境对车载卫星信号的影响。对等权模型、高度角加权模型、高度角-载噪比加权模型以及航向角加权模型进行了实测数据仿真和分析。结果表明,采用航向角模型的加权算法,相对于现有的经典加权模型,显著提升了车辆的定位精度。

Aiming at the problem that the occlusion environment on both sides of urban roads affects the performance of vehicle navigation and positioning,an optimized weighted satellite positioning algorithm using vehicle heading angle is proposed.The algorithm combines the characteristics of urban roads to construct a weighted model according to the direction of vehicle travel,the geometric distribution of satellites,and the carrier-to-noise ratio of the satellite signal,which effectively reduces the impact of the occlusion environment on both sides on the vehicle satellite signal.The measured data simulation and analysis are carried out on the equal weight model,the height angle weighted model,the height angle-carrier-to-noise ratio weighted model and the heading angle weighted model.The results show that the weighting algorithm of the heading angle model significantly improves the positioning accuracy of the vehicle compared to the existing classic weighting model.