摘要
针对多普勒积分法和多项式拟合法在周跳探测与修复时受观测误差和采样率的影响,无法准确地探测出周跳的大小,提出一种广义延拓外推多普勒的改进周跳探测方法。该方法通过挖掘最新多普勒数据的先验信息以及最新数据的影响力,利用广义延拓外推模型获得稳定且精度高的多普勒外推值,进而利用高精度的多普勒外推值与载波相位进行周跳探测,最后通过一次差的方式得到探测值。对实测数据进行周跳探测,结果表明,广义延拓外推多普勒的改进周跳探测方法能够准确探测1周及1周以上的周跳,性能优于多普勒积分法以及多项式拟合法。
Due to the influence of observation error and sampling rate,the cycle slip cannot be accurately detected by Doppler integral method and polynomial fitting method during cycle slip detection and repair.An improved cycle slip detection method based on generalized extended extrapolation Doppler is proposed by mining the prior information of the latest Doppler data and the influence of the latest data,the generalized extended extrapolation model is used to obtain a stable Doppler extrapolation value with high precision,and then the Doppler extrapolation value with high precision is used to detect the cycle skip with the carrier phase.Finally,the detection value is obtained by the way of one difference The cycle slip detection is carried out on the measured data.The results show that the improved cycle slip detection method with generalized extended extrapolated Doppler can accurately detect the cycle slip of 1 week or more,and its performance is better than that of Doppler integral method and polynomial fitting method.
作者
戴远流
符强
DAI Yuanliu;FU Qiang(Guangxi Key Laboratory of Precision Navigation Technology and Application,Guilin University of Electronic Technology,Guilin 541004,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《桂林电子科技大学学报》
2024年第2期210-215,共6页
Journal of Guilin University of Electronic Technology
基金
广西科技厅项目(桂科AA20302022,桂科AB21196041,桂科AB22035074,桂科AD22080061)
国家自然科学基金(62061010,62161007)
桂林市科技项目(20210222-1)
广西高校中青年教师科研基础能力提升计划(2022KY0181)
广西精密导航与应用重点实验室开放基金(DH202215)。
关键词
多普勒
广义延拓外推
多项式拟合
观测误差
周跳探测
Doppler
generalized extended extrapolation
polynomial fitting
observation error
cycle slip detection
