小波分析理论在GPS技术中的应用  

THE APPLICATION OF WAVELET ANALYSIS THEORY TO THE TECHNOLOGY OF GPS

作　　者：郑作亚[1] 黄珹[1] 卢秀山[2] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]山东科技大学地球信息科学与工程学院,泰安271019

出　　处：《中国科学院上海天文台年刊》2003年第24期48-55,共8页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

基　　金：国家"973"项目 (G19980 4 0 70 3);国家自然科学基金重点项目 (198330 30 );国家自然科学基金面上项目 (NS FC - 10 0 730 17);上海市科技发展基金项目 (0 1JC14 0 5 8);中国科学院知识创新工程重要方向项目 (KJCX2 -SW -T1);国家自然科学基金 (40 174 0 0 8

摘　　要：在GPS数据处理中 ,存在着误差影响、影响波的干扰、周跳和数据量大等问题。误差影响和影响波的干扰实质是在接收卫星信号时受到其它因素的影响 ;周跳是由于卫星信号的失锁而造成信号的不连续 ;数据量大是因为GPS观测需要采样间隔小又连续观测所致。由于小波理论具有时频分析、波形分解、特征提取和快速小波变换等特性 ,应用小波变换和波形分解可以解决误差影响和影响波的干扰的问题 ;应用特征提取可以解决周跳检测问题 ;In GPS data processing, there are some questions about the effect of error, the disturbance of some wave, cycle slip, the vast datum and so on, the effect of error and the disturbance of wave are due to the effect of others factors when receiving the signals of satellites; the cycle slip comes from the discontinuous signal; and the vast datum is caused by small sample interval and continuous observation. With the character of time-frequency analysis, wave-decomposing, attribute distilling and fast wavelet transformation, and so on, the application of wavelet transformation and wave-decomposing is the key to reduce the effect of error and the disturbance of some wave; the method of attribute distilling can detect cycle slip, and the fast wavelet transformation can compress the data. Some superficial opinions about GPS data processing are presented in this paper.

关 键 词：小波分析 GPS 数据处理 误差 动态监测 小波变换 

分 类 号：P228.4[天文地球—大地测量学与测量工程]