1 April 2005 New instantaneous frequency estimation method based on image processing techniques
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J. of Electronic Imaging, 14(2), 023013 (2005). doi:10.1117/1.1901677
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.
Monica Borda, Ioan Nafornita, Dorina V. Isar, Alexandru N. Isar, "New instantaneous frequency estimation method based on image processing techniques," Journal of Electronic Imaging 14(2), 023013 (1 April 2005). https://doi.org/10.1117/1.1901677
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