小波分析在GPS消噪中的应用探讨  

Application 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工程系,南宁市530003

出　　处：《勘察科学技术》2010年第4期25-27,共3页Site Investigation Science and Technology

摘　　要：笔者采用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。By using VB and MATLAB programming language,extracting the original carrier signal of Nanning experimental GPS control network observation data,making use of the dominance of wavelet analysis theory in multi-scale, multi-resolution,and scalable,shiftable etc.aspects,it separately extractes original carrier signal,single-difference observations,double difference observations using bd3 wavelet function for 3-layers wavelet decomposition,and studies the characteristics of high-frequency signals and effects of eliminating noise by different finite difference methods.Wavelet analysis theory is used as a mathematical tool,and the implementation of wavelet decomposition and reorganization in GPS observation data is carried out,it has certain practical value for discovering and reducing the GPS error.

关 键 词：小波 GPS 消噪 

分 类 号：P228.4[天文地球—大地测量学与测量工程]