Next Article in Journal
A Low-Order System Frequency Response Model for DFIG Distributed Wind Power Generation Systems Based on Small Signal Analysis
Next Article in Special Issue
Assessment of Energy Storage Operation in Vertically Integrated Utility and Electricity Market
Previous Article in Journal
Analysis of the Relative Price in China’s Energy Market for Reducing the Emissions from Consumption
Previous Article in Special Issue
Design Optimization of a High Power LED Matrix Luminaire
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Energies 2017, 10(5), 655;

Identification of Non-Stationary Magnetic Field Sources Using the Matching Pursuit Method

Department of Marine Telecommunications, Gdynia Maritime University, Morska 81-87, 81-225 Gdynia, Poland
Academic Editor: Rodolfo Araneo
Received: 16 February 2017 / Revised: 23 April 2017 / Accepted: 4 May 2017 / Published: 9 May 2017
Full-Text   |   PDF [4677 KB, uploaded 9 May 2017]   |  


The measurements of electromagnetic field emissions, performed on board a vessel have showed that, in this specific environment, a high level of non-stationary magnetic fields (MFs) is observed. The adaptive time-frequency method can be used successfully to analyze this type of measured signal. It allows one to specify the time interval in which the individual frequency components of the signal occur. In this paper, the method of identification of non-stationary MF sources based on the matching pursuit (MP) algorithm is presented. It consists of the decomposition of an examined time-waveform into the linear expansion of chirplet atoms and the analysis of the matrix of their parameters. The main feature of the proposed method is the modification of the chirplet’s matrix in a way that atoms, whose normalized energies are lower than a certain threshold, will be rejected. On the time-frequency planes of the spectrograms, obtained separately for each remaining chirlpet, it can clearly identify the time-frequency structures appearing in the examined signal. The choice of a threshold defines the computing speed and precision of the performed analysis. The method was implemented in the virtual application and used for processing real data, obtained from measurements of time-vary MF emissions onboard a ship. View Full-Text
Keywords: non-stationary magnetic field (MF); time-frequency analysis; matching pursuit (MP) algorithm non-stationary magnetic field (MF); time-frequency analysis; matching pursuit (MP) algorithm

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Palczynska, B. Identification of Non-Stationary Magnetic Field Sources Using the Matching Pursuit Method. Energies 2017, 10, 655.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top