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- 2016
一种新的高动态条件下实时高精度伪距计算方法
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Abstract:
针对高动态全球导航卫星系统(Global Navigation Satellite System,GNSS)仿真系统中伪距计算精度与实时性的矛盾,提出了一种基于三阶Hermite插值的实时高精度伪距计算方法。首先通过插值算法获得卫星轨道并调整误差项计算顺序来优化伪距计算方法,然后在已知两个节点处的伪距及其导数后,采用三阶Hermite插值算法计算伪距变化模型参数,其中伪距导数通过二阶Lagrange插值多项式的求导公式求得。高动态仿真结果表明,在时间间隔取1 s时,最大伪距误差为0.638 mm,标准差为0.172 mm
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