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- W2898060978 abstract "In this paper, we propose a new method to estimate instantaneous frequency using a combined approach based on the discrete linear chirp transform (DLCT) and the Wigner distribution (WD). The DLCT locally represents a signal as a superposition of linear chirps while the WD provides maximum energy concentration along the instantaneous frequency in the time-frequency domain for each of the chirps. The developed approach takes advantage of the separation of the linear chirps given by the DLCT, and that for each of them, the WD provides an ideal representation. Combining the WD of the linear chirp components, we obtain a time-frequency representation free of cross-terms that clearly displays the instantaneous frequency. Applying this procedure locally, we obtain an instantaneous frequency estimate of a non-stationary multicomponent signal. The proposed method is illustrated by simulation. The results indicate the method is efficient for the instantaneous frequency estimation of multicomponent signals embedded in noise, even in cases of low signal to noise ratio." @default.
- W2898060978 created "2018-10-26" @default.
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- W2898060978 date "2018-10-12" @default.
- W2898060978 modified "2023-09-27" @default.
- W2898060978 title "Instantaneous frequency estimation using the discrete linear chirp transform and the Wigner distribution" @default.
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