GPS单历元形变信号的小波降噪Wavelet de-noising of GPS single epoch deformation signals
王坚,高井祥,孙祥中
摘要(Abstract)：
阐述了小波变换、多分辨分析及中值滤波的基本原理。研究了对小波变换的高频系数采用中值滤波,然后重构信号达到降噪目的的形变数据处理新方法。并与强制降噪及软门限阈值化小波降噪方法比较。模拟实验表明,基于高频中值滤波的小波降噪方法不仅能有效降噪,保持信号的光滑性,还能在降噪的过程中剔除少量粗差。
关键词(KeyWords)： 单历元;形变监测;中值滤波;小波变换;小波降噪
基金项目(Foundation):
作者(Author): 王坚,高井祥,孙祥中
参考文献(References)：
- [1] RAN Qi-wen. Theory and application of wavelet transform and fractional fourier transforms [ M ]. Harbin: Publishing House of Harbin Institute of Technology.2001:148-152．
- [2] GUI Yan-ning.JIAO Li-cheng, ZHANG Fu-shun. Study of the inertia parameter measurement in telemetering for guided bombs with a wavelet de-noise technique [ J ]. Journal of Xidian University,2003,(1) ,117-119．
- [3] ZHANG Jun.LIU Jian. A speckle reduction algorithm by soft-thresholding based on wavelet filters for SAR images [J] . ACTA Geodaetica et Cartographica Sinica
- [4] David Donoho L. De-noising by soft-thresholding [ J ]. IEEE Trans Information Theory,1995,41(3) .
- [5] ZENG Zhao-hui,Ian Cumming.Bayesian speckle noise reduction using the discrete wavelet transform[J] . IEEE. Transation on Geoscience and Remote Sensing, 1998．
- [6] David Marer, YAO Guo-zheng( translator). Visioncomputation theory[M]. Beijing:Science Publishing House, 1988．
- [7] 高永泉,章传银.近海多种卫星测高联合数据处理技术[J].测绘科学,2002,(2) .