摘要
伪距测量值是GPS接收机最基本的距离测量量,对导航定位的精度具有重要影响,通过一些方法提高伪距精度可以有效改善定位精度,而载波相位平滑伪距是提高伪距精度的一种简单有效的方法。文章在阐述平滑伪距原理的基础上,介绍了一种载波相位平滑伪距技术,并详细分析了平滑窗口、周跳判断门限的选取对该技术平滑效果的影响。以高动态数据为例,确定参数的合理取值,进行定位精度分析和伪距精度改进分析,并从统计角度分析了载波相位、伪距及平滑伪距之间的相互关系。结果表明,该方法能够有效提高伪距测量的精度,对提高GPS接收机的实时定位精度具有实际应用价值。
Abstract： Pseudorange is one of the basic range measurements for GPS receiver, having the significant effect on the navigation accuracy.Positioning accuracy can be improved if some ways can be found to enhance the accuracy of pseudorange. Carrier phase smoothed pseudorange is one simple and effective method to improve pseudorange accuracy.This article advanced one Code Pseudorange SmOothing algorithm based on the smoothing principle,and analysed the relationship between Smoothing effect and smoothing window or cycle-slip detection door values.In the case of high dynamic datas,the reasonable value of parameters were determined,followed by positioning and pseudorange accuracy improving analysis.Finally,the article analysed from a statistical point of view the relationship between carrier phase,pseudorange and smoothed pseudorange.The results of experiment indicate that this algorithm can improve the accuracy of pseudorange measurement.This is very meaningful to accurate position and navigation of GNSS receiver.
出处
《电子设计工程》
2013年第8期112-115,共4页
Electronic Design Engineering
关键词
平滑伪距
载波相位
周跳探测
周整模糊度
定位精度
Key words： smoothing code pseudorange
carrier phase
cycle-slip detection
integer ambiguity
positioning accuracy
