摘要
经验模态分解(empirical mode decomposition,EMD)方法不能解决探地雷达信号的混频现象,文章提出了探地雷达信号时域集合经验模分解(ensemble empirical mode decomposition,EEMD)分析方法。通过分析可知,EEMD方法可以克服EMD方法的模态混频现象。文中由时域有限差分(finite difference time domain,FDTD)方法正演出探地雷达模型的信号,利用EEMD方法分离探地雷达特征模量,并对不同的特征模量进行分析,将受到白噪声干扰的探地雷达正演信号通过EEMD方法去噪,结果表明去除干扰效果显著。
Empirical mode decomposition（EMD） method can not effectively solve the phenomenon of ground penetrating radar（GPR） frequency mixing. In this paper, the method of ensemble empirical mode decomposi- tion（EEMD） analysis of GPR signal in the time domain is proposed. The result shows that the EEMD method can overcome the modal frequency mixing of the EMD method. The finite difference time domain （FDTD） methods are performed to simulate the signal of GPR model. Then the GPR intrinsic modulus is isolated by u- sing the EEMD method from forward signal and different intrinsic modal features are analyzed. Furthermore, the EEMD method is used to remove the noise from the GPR signal with white noise. The experimental re- sults verify the effectiveness of interference removal.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第5期639-642,共4页
Journal of Hefei University of Technology：Natural Science
基金
江苏省博士后基金资助项目(1401124C)
江西省数字国土重点实验室开放基金资助项目(DLLJ201506)
关键词
噪声干扰
特征模量
探地雷达
模态混频
noise interference
intrinsic modtdus
ground penetrating radar（GPR）
modal frequency mixing
