基于小波降噪的GPS基线解算方法  

GPS baseline solution based on wavelet denoising

作　　者：冯宝红[1] 葛义强 

机构地区：[1]南京工业大学测绘学院,江苏南京211800

出　　处：《南京工业大学学报（自然科学版）》2015年第3期79-84,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省测绘地理信息科研项目(JSCHKY201202)

摘　　要：GPS双差观测量信号可以看成是含有噪声的一维离散信号。利用小波分析对双差观测量降噪,并将降噪后的双差观测量用于基线解算,有效提高了基线浮点解的精度。本文以具有正交性及紧支撑性的db3小波进行多尺度双差观测量的降噪,研究了该小波不同分解尺度降噪对基线解算结果的影响,通过实例计算,得出db3小波单尺度分解降噪较多尺度降噪效果更优,最后讨论了降噪小波的选择依据及分解尺度的确定方法。GPS double difference observation signal could be regarded as one-dimensional discrete signal with noise.The wavelet analysis was usually used to reduce the high frequency noise of carrier phase GPS double difference observation,experiments indicate that float baseline solution become more reliable,and the coordinates were more precise after wavelet denoising.The db3 wavelet with orthogonal and compactly supported was used for denoising double difference observation.Calculation results showed that single level decomposition works best in signal denoising.Finally wavelet selection standard was also discussed.

关 键 词：小波分析 GPS 双差观测量 基线浮点解 

分 类 号：P228.4[天文地球—大地测量学与测量工程]