Empirical Mode Decomposition versus Wavelet filtering for Time Domain Electromagnetic Signals

Authors

  • Rajesh Tikamchand Keshwani Scientific officer, EMAS, CnID, BARC
  • Sanjay Malhotra Head, EMAS, CnID, BARC
  • Yatindra Kumar Taly Head, CnID, BARC

Keywords:

wavelet, EMD, IMF, TDEM

Abstract

Time Domain Electromagnetic (TDEM) methods are used for exploration of deep seated mineral deposits by measuring sub-surface conductivity of the earth. The response of earth is measured by an induction coil. The signals acquired are contaminated by variety of noises. Signal filtering plays a major role in order to obtain deeper information regarding subsurface conductivities. Various methods based on conventional DSP filters, wavelets, etc. have been attempted. This paper explains in short a methodology of Empirical mode decomposition by intrinsic mode functions. The potential of this technique for filtering TDEM signal is demonstrated, further a comparison of EMD technique with wavelet based filter is illustrated.

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Published

2013-05-02

Issue

Vol. 3 No. 1 (2013)

Section

Research Articles

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