| 平稳小波变换在探地雷达资料降噪中的应用 |
| |
| 引用本文： | 张剑,师学明,刘梦花.平稳小波变换在探地雷达资料降噪中的应用[J].工程地球物理学报,2008,5(5):590-595. |
| |
| 作者姓名： | 张剑 师学明 刘梦花 |
| |
| 作者单位： | 中国地质大学,地球物理与空间信息学院,武汉,430074 |
| |
| 基金项目： | 湖北省杰出青年科学基金，国家自然科学基金，中国石油天然气集团公司资助项目 |
| |
| 摘 要： | 小波变换方法是一种新的数学方法，具有强大的时频分析能力，广泛地应用到信号处理的各个领域。其中正交小波变换不具备线性相位、不具有平移不变性等特性，导致其在信号降噪领域仍存在很多问题，会使信号产生振荡现象。本文利用平稳小波变换对多组探地雷达模型实验与实际雷达资料的处理，说明该方法较好地保留了信号边缘细节，避免了伪Gibbs现象，其降噪效果明显优于普通正交小波方法的降噪效果。
|
| 关 键 词： | 平稳小波变换 正交小波变换 探地雷达 Gibbs现象 阈值降噪 |
Stationary Wavelet Transform and Its Application to Noise Reduction in Ground Penetrating Radar |
| |
| Zhang Jian,Shi Xueming,Liu Menghua.Stationary Wavelet Transform and Its Application to Noise Reduction in Ground Penetrating Radar[J].Chinese Journal of Engineering Geophysics,2008,5(5):590-595. |
| |
| Authors: | Zhang Jian Shi Xueming Liu Menghua |
| |
| Affiliation: | (Institute of Geophysics ＆ Geomatics , China University of Geosciences , Wuhan 430074, China) |
| |
| Abstract: | The wavelet transform is a new mathematical method which has a strong ability to analyse time-frequency.It's widely applied to various fields of signal processing.Orthogonal wavelet transform is not possessed with linear phase or translation invariant features,so there are still many problems in the field of signal noise reduction,such as signal oscillation phenomenon.In this paper,we applied stationary wavelet transform to some ground penetrating radar models and the filed radar data.The results show that this method retains the edge of the signal details and avoids the phenomenon of pseudo-Gibbs.Noise reduction effect of stationary wavelet transform is superior to ordinary orthogonal wavelet method. |
| |
| Keywords: | stationary wavelet transforms orthogonal wavelet transforms ground penetrating radar Gibbs phenomenon threshold of noise reduction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
