In this paper, a method for signal instantaneous attribute analysis using wavelet transform based on EMD (Empirical Mode Decomposition) is proposed. It includes three procedures while extracting instantaneous frequencies and amplitudes of non-stationary signal. First, a non-stationary signal is decomposed into some IMFs (Intrinsic Mode Functions) by using EMD method; second, applying wavelet transform to the IMFs, the wavelet ridge line is extracted from the phase function of the wavelet coefficients; final...