Transformée en paquets d'ondelettes des signaux stationnaires: comportement asymptotique des densités spectrales.
Loïc Hervé (1996)
Revista Matemática Iberoamericana
Similarity:
We consider quadrature mirror filters, and the associated wavelet packet transform. Let X = {X} be a stationary signal which has a continuous spectral density . We prove that the 2 signals obtained from X by n iterations of the transform converge to white noises when n → +∞. If is holderian, the convergence rate is exponential.