Transient characteristic extraction based on wavelet packet decomposition and EMD

EMD has its own interpretation of combinations of pure tones, and mode mixing is one of the problems because of the noise and multi component. We give a solution involving wavelet packet decomposition with EMD. The improved signal method is based on wavelet packet decomposition, the noise of the signal is eliminated and we get the IMF without mode mixing. The method also allows EMD to be used to separate components that are similar in frequency that would be inseparable with standard EMD techniques. The experiment shows the method to improve EMD is practical and effective.