Spectral Analysis of Very Low Frequency (VLF) Transients Using Empirical Mode Decomposition

Author(s)	Amrendra Kumar, Ashutosh Kumar, Deepak Kumar Sondhiya
Country	India
Abstract	Empirical Mode Decomposition (EMD) combined with Hilbert spectral analysis provides an adaptive framework for analyzing nonlinear and non-stationary signals. In this study, Very Low Frequency (VLF) transient signals are analyzed using EMD to extract intrinsic mode functions (IMFs) and instantaneous frequency characteristics. The results demonstrate clear identification of dispersive and spiky whistler structures, resonance phenomena, and harmonic components. The method provides improved time–frequency resolution compared to conventional spectral techniques.
Keywords	Keywords- Empirical Mode Decomposition (EMD), Very Low Frequency (VLF) transient signals, spectral techniques.
Field	Engineering
Published In	Volume 8, Issue 1, January-February 2026
Published On	2026-01-10

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