基于高次差法的降低北斗定位漂移研究

Study on Beidou Positioning to Reduce Drift of High-Order Difference Method

针对目标在定位会出现漂移现象,漂移会造成定位不准确,分析了欧式几何空间距离、时间序列以及相关系数等方法的优缺点,对高次差的理论依据进行了阐述、分析和推导,本文根据高次差的理论,提出了一种基于高次差法判断是否出现定位漂移,根据高次差法的特征子序列对非差速度进行试验测试,通过试验研究结果表明:高次差法能有效地探测连续几个定位漂移并判断出现漂移的位置,并对漂移数据进行处理,进而降低定位漂移,提高了定位数据的准确性。

First introduces the reasons of positioning drift, drift will result in inaccurate positioning, analyzes the advantages and disadvantages of the methods such as Euclidean space distance, time sequence and correlation coefficient method. The theoretical basis of high-order difference are described, analyzed and deduced. According to the theory of high-order difference, a method based on the high-order difference method is proposed to determine whether there is a drift in position. According to the characteristics of subsequence of non differential speed test, the experimental results show that high-order difference method can effectively detect several positioning drift and judgment drift position, thereby reducing positioning drift, improve the accuracy of positioning data.