The wavelet analysis method of stationary random processes

The spectral analysis of stationary random processes is studied by using wa velet transform method. On the basis of wavelet transform, the conception o f time-frequency power spectral density of random processes and time-freque ncy cross-spectral density of jointly stationary random processes are prese nted. The characters of the time-frequency power spectral density and its r elationship with traditional power spectral density are also studied in det ails.