2. Signal laws

Determining the laws of a signal (amplitude and frequency modulations) is a problem we're trying to solve in many fields (acoustics, radar and sonar detection, etc.). The time-frequency methods mentioned (atomic decompositions or energy distributions) can be used to approximate these modulations. Energy distributions naturally find a privileged field of application here. We define here an equivalent for algorithms related to atomic decompositions, using wavelet analysis as a basic tool. The transposition to the case of FFGs is immediate and yields similar results.