GPS相位观测值中周跳的探测与修复

Cycle Slips Detection and Recovery for GPS Carrier Phase

对于初始化载波相位整周模糊度的GPS定位而言,如果在整周模糊度初始化过程中发生载波相位周跳,将严重影响整周模糊度的确定。针对GPS载波相位定位中出现的周跳问题,提出了一种新的周跳的检测方法,首先用多项式模型的卡尔曼滤波对载波相位测量值进行预处理,然后再用奇偶矢量法探测和修复周跳。通过某OEM板输出的数据计算结果仿真,验证了新方法可以有效地探测出一周周跳。

In GPS positioning,the cycle slip occurred in the period of integer ambiguity initializating must be carefully removed. This paper discusses cycle slip problem and its solving method. New methods for enhancing detection capability are presented. Firstly, using Kalman filter in the model of the polynomial to pretreat the carrier phase,and then a parity vector test method is used to detect cycle slips. A test is carried out and implies that the new method can detect and repair small cycle slip.