探地雷达回波信号小波压缩方法研究

Study of Wavelet Transform Compression of Ground Penetrating Radar Signal

介绍了多分辨分析和小波变换的基本理论以及常用小波变换压缩数据的三种方法 :只保留近似信号 ;全部保留近似信号及细节信号中的较大值 ;保留近似信号及细节信号中的较大值。将紧支集小波 (Daubechies)和正交三次 B-样条小波压缩探地雷达数据进行了对比 ,计算表明正交三次 B-样条小波变换方法效果较好 ,而在全部保留近似信号及只保留细节信号中数值较大的系数时 。

The signal of a ground penetrating radar is a non stationary random one. In this paper, an introduction to wavelet transform and multi resolution analysis is presented. three common data compression methods based on wavelet transform for spectral information are descrbied. The data of a ground penetrating radar data compessed by the Daubechies compactly supported orthogonal wavelet and the orthogonal cubic B splines wavelet are compared. The results show that the orthogonal cubic B splines wavelet can get high effectiveness and can achieve a lange data compression ratio.