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Journal of Electronic Imaging

New instantaneous frequency estimation method based on image processing techniques
Author(s): Monica Borda; Ioan Nafornita; Dorina V. Isar; Alexandru N. Isar
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Paper Abstract

The aim of this paper is to present a new method for the estimation of the instantaneous frequency of a frequency modulated signal, corrupted by additive noise. Any time-frequency representation of an acquired signal is concentrated around the instantaneous frequency law of its useful component (the projection of the ridges of the time-frequency representation on the time-frequency plane) and realizes the diffusion of its noise component. So, extracting the ridges of the time-frequency representation, the instantaneous frequency of its useful component can be estimated. In this paper a new time-frequency representation is proposed. Using the image of this new time-frequency representation, its ridges can be extracted with the aid of some mathematical morphology operators. This is a ridges detection mechanism producing the projection on the time-frequency plane. This projection represents the result of the proposed estimation method. Some simulations prove the qualities of this method.

Paper Details

Date Published: 1 April 2005
PDF: 11 pages
J. Electron. Imaging. 14(2) 023013 doi: 10.1117/1.1901677
Published in: Journal of Electronic Imaging Volume 14, Issue 2
Show Author Affiliations
Monica Borda, Univ. Tehnica Cluj-Napocã (Romania)
Ioan Nafornita, Univ. Politehnica Timisoara (Romania)
Dorina V. Isar, Univ. Politehnica Timisoara (Romania)
Alexandru N. Isar, Univ. Politehnica Timisoara (Romania)

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