物探化探计算技术2024，Vol.46Issue(4)：446-452,7.DOI:10.3969/j.issn.1001-1749.2024.04.09
VMD-HHT方法在大地电磁强人文干扰去噪中的应用
Application of VMD-HHT in magnetotelluric strong human interference denoising
摘要
Abstract
The magnetotelluric data usually has a wide frequency range and weak target signal.When the signal is collected in the city,it is very easy straightforward to be interfered with by the human electromagnetic noise,which reduces the signal-to-noise ratio,and results in the deviation of the inversion results.Mode aliasing often occurs in the process of empirical mode decomposition(EMD)in the traditional Hilbert-Huang transform denoising.In this paper,an improved Hilbert-Huang trans-form method based on Variational Mode Decomposition(VMD-HHT)is proposed to suppress and denoise the strong human e-lectromagnetic noise in cities.The results show that the improved Hilbert-Huang transform can effectively suppress modal aliasing,and significantly improve the signal-to-noise ratio of electromagnetic data.Thus it can provide high-quality time series for subsequent apparent resistivity inversion.关键词
大地电磁/VMD-HHT/城市人文干扰/去噪Key words
magnetotelluric/VMD-HHT/urban electromagnetic noise/denoising分类
地质学引用本文复制引用
蔡足根,耿德祥,王明明,杨明生..VMD-HHT方法在大地电磁强人文干扰去噪中的应用[J].物探化探计算技术,2024,46(4):446-452,7.基金项目
安徽省高校自然科学研究项目(2023AH052232) （2023AH052232）
宿州学院博士后科研启动基金(2022BSH002) （2022BSH002）
综合地球物理研究所校级平台(2021XJPT54) （2021XJPT54）
