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New instantaneous frequency estimation method based on image processing techniques

[+] Author Affiliations
Monica Borda

Technical University, Cluj-Napoca, Romania

Ioan Nafornita, Dorina Isar, Alexandru Isar

“Politehnica” University Timisoara, Romania E-mail: isar@etc.utt.ro

J. Electron. Imaging. 14(2), 023013 (May 6, 2005). doi:10.1117/1.1901677
History: Received Oct. 21, 2003; Revised May 6, 2004; Accepted Oct. 29, 2004; May 6, 2005; Online May 06, 2005
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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. © 2005 SPIE and IS&T.

© 2005 SPIE and IS&T

Citation

Monica Borda ; Ioan Nafornita ; Dorina Isar and Alexandru Isar
"New instantaneous frequency estimation method based on image processing techniques", J. Electron. Imaging. 14(2), 023013 (May 6, 2005). ; http://dx.doi.org/10.1117/1.1901677


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