基于改进阈值的提升小波变换在探地雷达信号去噪中的应用  

Application of Lifting Wavelet Transform to Ground Penetrating Radar Signal Denoising Based on Improved Threshold Value

作　　者：许后磊[1,2] 储冬冬 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水资源高效利用与工程安全国家工程研究中心,南京210098 [3]江苏省水利科学研究院,南京210017

出　　处：《三峡大学学报（自然科学版）》2010年第2期42-47,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(50879024);水利工程病变机理与健康诊断项目(2009586012);国家科技支撑计划课题(2008BAB29B06);江苏省"333高层次人才培养工程"科研项目(2017-B08037)

摘　　要：针对探地雷达采集的为非平稳信号且存在尖峰或突变状的特点,为了除去信号中的噪声,引入了基于提升算法的小波变换去噪方法.考虑到传统软硬阈值函数去噪方法存在的不足提出了改进的新阈值函数.通过对探地雷达二维正演仿真模型的去噪效果分析,综合计算时间和去噪效果考量,基于改进阈值的提升小波变换在探地雷达信号去噪方面具有一定的应用价值.For the characteristics of noise and peak or mutation-shaped non-stationary signal which exist in the ground-penetrating radar signal acquisition,based on the lifting algorithm,the wavelet transform denoising method is introduced;taking into account the deficiency existing in traditional hard and soft threshold function,a new improved threshold function is proposed.Through analyzing the denoising effect of two-dimensional ground-penetrating radar simulation model and considerations of calculation time and denoising effect,it is found that the threshold increase based on improved wavelet transform denoising in ground penetrating radar signal has a certain value.

关 键 词：探地雷达 新阈值 提升算法 小波分析 信号去噪 

分 类 号：TV698.1[水利工程—水利水电工程]