期刊文献+

基于经验模态分解法与小波变换的长周期大地电磁信号去噪方法 被引量:8

AN IMPROVED DENOISING METHOD FOR LONG-PERIOD MAGNETOTELLURIC SOUNDING BASED ON EMD AND WAVELET TRANSFORMATION
下载PDF
导出
摘要 针对大地电磁信号具有非线性、非平稳和非最小相位的特点,提出了一种基于经验模态分解法结合小波变换的联合信号去噪方式,将时间序列信号通过经验模态分解,利用连续均方误差准则确定原始信号能量转折点,进而再使用小波阈值去噪法对剩余固有模态函数分量进行去噪,最后重构出消噪信号。通过对实测信号处理前后结果的对比,表明了本方法能够有效地应用于信号时域去噪。 In consideration of the nonlinear,non-stationary and non-minimum phase characteristics of the magnetotelluric signal,this paper has proposed a denoising method based on empirical mode decomposition and wavelet transform,in which the time series signal is decomposed by EMD transform,the continuous mean square error criteria are used to determine a turning point in the original signal energy,then the wavelet threshold denoising method is employed to denoise the residual amount of intrinsic mode function,and finally the signal is reconstructed.Tests of signal processing show that the method can be effectively applied to signal denoising process.
出处 《物探与化探》 CAS CSCD 2012年第3期452-456,共5页 Geophysical and Geochemical Exploration
基金 国家自然科学基金项目"扬子地台西缘深部地质结构与油气赋存背景研究"(40839909) 国家自然科学基金项目"汶川大地震余震综合监测与龙门山前山断裂带活动性分析"(40841012) 国家自然科学基金项目"龙门山中段地壳与上地幔电性结构及其动力学特征"(40674035)
关键词 长周期大地电磁测深 经验模态分解 小波分析 时间域去噪 long-period magnetotelluric sounding EMD wavelet analysis noise suppression in time domain
  • 相关文献

参考文献13

  • 1覃庆炎,王绪本,罗威.EMD方法在长周期大地电磁测深资料去噪中的应用[J].物探与化探,2011,35(1):113-117. 被引量:6
  • 2杨力.MALLATS信号处理的小波导引[M].北京:机械工业出版社,2002.
  • 3Huang N E,Long S R,Shen Z.Frequency downshift in nonlinear water wave evolution[J].Adv Appl Mech, 1996,32:59-117.
  • 4Huang N E,Shen Z,Long S R,et al.The empirical mode decompo-sition and the Hilbert spectrum for nonlinear and non-stationarity time series analysis[J].Proc R Soc London,Ser A,1998,454:903-995.
  • 5Huang N E,Wu M C,Long S R,et al.A condifidence limit for the empirical mode decomposition and the Hilbert spectral analysis[J].Proc R Soc London,Ser A,2003,459:2317-2345.
  • 6蔡剑华.基于Hilbert_Huang变换的大地电磁信号处理方法与应用研究.长沙:中南大学,2010.
  • 7Huang N E,Shen Z,Long S R.A new view of nonlinear water waves:the Hilbert spectrum[J].Annual Review of Fluid Mechanics,1999:417-457.
  • 8Flandrin G,Rilling G,Goncalves P.Empirical mode decomposition as a filter bank[J].IEEE Signal Processing,2004,11(2).
  • 9汤井田,化希瑞,曹哲民,任政勇,段圣龙.Hilbert-Huang变换与大地电磁噪声压制[J].地球物理学报,2008,51(2):603-610. 被引量:105
  • 10Donoho D L,Johnstone I.Wavelet shrinkage asymptopia[J].Journal of Royal Statistical Society,1995,57(2).

二级参考文献25

共引文献134

同被引文献88

  • 1李钢虎,李亚安,贾雪松.水声信号的混沌特征参数提取与分类研究[J].西北工业大学学报,2006,24(2):170-174. 被引量:6
  • 2聂百胜,何学秋,何俊,翟盛锐.电磁辐射信号的小波变换去噪研究[J].太原理工大学学报,2006,37(5):557-560. 被引量:8
  • 3戴吾蛟,丁晓利,朱建军,陈永奇,李志伟.基于经验模式分解的滤波去噪法及其在GPS多路径效应中的应用[J].测绘学报,2006,35(4):321-327. 被引量:145
  • 4王家映,Oldenburg D,Levy S.大地电磁测深的拟地震解释法[J].石油地球物理勘探,1985,20(1):67-79.
  • 5Sokolova E Y, Varentsov I M, EMTESZ-Pomerania Working Group. RRMC technique fights highly coherent EM noise Workshop thesis[A]. Wohl denberg, Germany, 2005, 124 -136.
  • 6Ernst T, Sokolova E Y, Varentsov I M, et al. Comparison of two techniques for magnetotelluric data processing using synthetic data sets[J]. Acta Geophysica Polonica, 2001, 49 (2): 213- 243.
  • 7Egbert G D, Booker J R. Robust estimation of geomagnetic transfer functions [J]. Geophysical Journal International, 1986, 87(1): 173-194.
  • 8Egbert G D, Livelyhrooks D W. Single station magnetotelluric impedance estimation: Coherence weighting and the regression M-estimate[J]. Geophysics, 1996, 61 (4): 964- 970.
  • 9Gamble T D, Goubau W M, Clarke J. Magnetotellurics with a remote magnetic reference[J]. Geophysics, 1979, 44 (1): 53 -68.
  • 10Chave A D, Thomson D J. Some comments on rnagnetotelluric response function estimation [J]. Journal of Geophysical Research, 1989, 94(B10): 14215-14225.

引证文献8

二级引证文献50

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部