小波分析在GPS消噪中的应用探讨  

The Discussion of GPS De-noising Effect Based on Wavelet Analysis

作　　者：李海文[1] 

机构地区：[1]广西建设职业技术学院土木系,广西南宁530003

出　　处：《测绘》2010年第3期110-112,共3页Surveying and Mapping

摘　　要：采用VB语言与MATLAB语言编程,提取南宁实验GPS控制网观测数据中的原始载波信号,利用小波分析理论在多尺度、多分辨率、可伸缩、可平移等分析方面的优势,分别对提取的原始载波信号、单差观测值、双差观测值采用bd3小波函数进行3层小波分解,研究高频信号特点以及不同差分方法消除噪声的效果。将小波分析理论作为数学工具,实施GPS观测数据小波分解和重组,对于发现并削弱GPS误差具有一定的参考价值。The author using VB and MATLAB programming language,extracting the original carrier signal of Nanning experimental GPS control network observation data,using wavelet analysis theory in multi-scale,multi-resolution,scalable,shiftable the advantage of such analysis separately extracted from original carrier signal,single-difference observations,the use of double difference observations db3 wavelet function for 3-layer wavelet decomposition to study the characteristics of high-frequency signals and different finite difference method to eliminate noise effects.Wavelet analysis theory as a mathematical tool,the implementation of wavelet decomposition and reorganization in GPS observation data,having a certain practical value for discovering and weakening the GPS error.

关 键 词：小波 GPS 消噪 

分 类 号：P228[天文地球—大地测量学与测量工程]