Method and device for estimating speed, or speed class, of a user mobile communication device in a wireless communication network

A method and system for estimating speed, or speed class, of a user mobile communication device in a wireless communication network are provided. Various embodiments provides acquiring (301) a signal, named original signal (Ri), exchanged between said mobile communication device and a wireless access point of the wireless communication network. Acquiring (301) step may be followed by denoising (302) said original signal (Ri) by deleting the fast fading component of said original signal (Ri) to generate a denoised signal (Si), and then subtraction (303) of said denoised signal (Si) from said original signal (Ri) to generate a residual original signal (RESi), for decomposing (304) said residual original signal (RESi) with a wavelet decomposition function. Speed, or speed class, of the user mobile communication device may then be estimated in function of the result of said residual original signal wavelet decomposition.