时间序列分析在周跳探测与修复中的应用  

Time Series Analysis and Its Application in Detection and Correction of Cycle Slip

作　　者：滕云龙[1,2] 师奕兵[2] 郑植[1] 

机构地区：[1]电子科技大学电子科学技术研究院,成都610054 [2]电子科技大学自动化工程学院,成都610054

出　　处：《宇航学报》2011年第3期543-548,共6页Journal of Astronautics

基　　金：航空科学基金(20090580013)

摘　　要：周跳是GPS载波相位测量数据处理中必须解决的关键问题,为了获得高精度的导航定位结果,必须对其进行快速准确地探测与修复。分析了周跳产生的原因及其特点,结合时间序列分析理论,提出了一种新的周跳探测与修复方法。首先对载波相位测量数据进行四次差分处理;然后建立了载波相位测量数据的加权预测模型,并给出了权值计算方法;最后通过对比载波相位预测值与实际测量值的大小来探测与修复周跳。利用实际数据验证表明:新方法适用于单频接收机,可以对3周以上的周跳进行准确探测与修复。Cycle slip is an important problem in the data processing of GPS carrier phase observations.In order to attain high accuracy positioning and navigation results with GPS,cycle slips must be correctly detected and corrected.Based on the characteristics of cycle slips,a novel method based on time series analysis is presented in this paper.Firstly,the fourth difference series of carrier phase observations are calculated.Then,a weighted prediction model for carrier phase observations is established,and the new method for calculating weights is also discussed.Finally,the actual number of cycle slips can be determined and repaired through comparing the difference between forecasting value and real value.Experimental results show that the new method can not only be used in single-frequency receiver,but also can improve the efficiency of detection and correction of cycle slips.The minimum value of cycle slips that can be identified is 3 cycles.

关 键 词：单频接收机 载波相位 周跳 探测与修复 时间序列分析 

分 类 号：TN96[电子电信—信号与信息处理]