【摘要】 针对北斗典型应用场景下缺乏有效的导航效能评估手段问题,在场景建模的基础上提出用户终端的导航效能评估方法。首先分析北斗卫星导航可能存在的典型挑战性环境,提出典型应用场景构建要素,并根据构建要素构建了山地应用场景;然后提出以卫星可见性、导航精度为指标的导航效能评估方法;最后通过选取数字高程数据等建立具体场景,对其中的导航用户进行了效能分析。结果表明,该场景可以反映真实的导航情景,在此背景下提出的效能评估方法具有实用价值。更多还原

【Abstract】 Beidou lacks effective methods of navigation performance assessment in its representative applying scenes.This paper puts forward a way to evaluate the performance of Beidou user terminals based on the modeling of the scenes.This paper analyzes the possible challenge environment that Beidou might face and lists the elements to construct it.Then,the hilly scene is built following the steps.On this condition,the visibility of satellites and the precision of navigation are listed as major parameters to evaluate the navigation performance of user terminals.In the end,we construct a specific scene based on DEM and analyze the parameters mentioned above.The research demonstrates that the scene we have constructed can show the navigation performance in real life.The navigation performance assessment is practical in these circumstances.更多还原