基于小波分析的坝区GPS信号噪声研究  

Noise of Dam GPS Signal Based on Wavelet Analysis

作　　者：夏开旺[1] 田林亚[2] 杨永平[3] 

机构地区：[1]安徽建筑工业学院土木工程系,安徽省合肥市230601 [2]河海大学测量工程系,江苏省南京市210098 [3]北方自动控制技术研究所,山西省太原市030006

出　　处：《水电自动化与大坝监测》2006年第4期51-55,共5页HYDROPOWER AUTOMATION AND DAM MONITORING

摘　　要：坝区观测条件复杂,观测的全球定位系统(GPS)信号含有多种噪声。提取某坝区GPS控制网观测数据中的原始载波信号,利用小波分析在多尺度、多分辨率、可伸缩、可平移等方面的优势,对GPS原始载波信号、单差观测值、双差观测值进行小波分解,研究高频信号的特点。利用小波分析工具实施GPS观测数据的小波分解和重组,研究GPS信号噪声的特性,对GPS网数据处理具有较好的指导和实用意义。Because of complicated observation conditions, the dam GPS signals always encounter several kinds of disturbances. By use of the advantages of wavelet analysis in multi-scale, multi-resolution, flexibility and movability, the original carrier wave signals, single-difference observed values and double-difference observed values obtained from the GPS control network of a dam are decomposed for the research into the characteristics of high-frequency noise. The research demonstrates the theoretical and practical significance of wavelet analysis in decomposition and recomposition of GPS data. It is an important mathematical tool for GPS data processing.

关 键 词：全球定位系统 信号 噪声 小波分析 大坝 

分 类 号：TV698.1[水利工程—水利水电工程] P228.4[天文地球—大地测量学与测量工程]