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2 publications

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    Spike Detection and Processing of TDEM Signals using Wavelet Transform

    By Rajesh T. Keshwani, Vikas Teotia, Gopal Joshi, Sanjay Malhotra, Y K Taly

    Abstract: This paper presents a new method for spike detection, parameterization and processing in ground based Time Domain Electromagnetic (TDEM) signals. Time Domain Electromagnetic methods are used for mineral exploration by sub-surface conductivity measurement of Earth. The Earth’s response measured using inductive sensors are contaminated by spikes in form of sferics and due to load and phase shift in power distribution lines. The spikes present in the measured signal can significantly …

    Published in Current Trends in Signal Processing · Vol. 2, Issue 1-3, 2012 · pp. 82–92 Read article

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    Empirical Mode Decomposition versus Wavelet filtering for Time Domain Electromagnetic Signals

    By Rajesh T. Keshwani, Sanjay Malhotra, Yatindra Kumar Taly

    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 …

    Published in Current Trends in Signal Processing · Vol. 3, Issue 1, 2013 · pp. 8–14 Read article

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