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In this paper, it is proposed to treat the square wavelet coefficients as a probability density function in order to be able to measure energy concentration/dispersion in the tiled time-frequency plane. The proposed measure is the average distance to the center of mass of the tiled time frequency plane. This measure not only indicates energy concentration/dispersion in the tiled time-frequency plane...
The frequency spectrum is a fundamental quantity for the analysis and design of a system. When a system is turned on or off, the frequency spectrum of its output changes with time. We define the transient spectrum as the time-frequency spectrum of the system output during the transient phase. We obtain the exact transient spectrum for a wide class of random systems, and we formulate it with respect...
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