An Improved Method Dealing with the End Effect of Hilbert-Huang Transform

An improved method dealing with the End Effect of Empirical Mode Decomposition is proposed. The period of the signal components is evaluated from high order autocorrelation function in the process of signal decomposition. Then, the signal components are extended based on the proposed criterion. The fluctuant trend of the extended sequences is consistent with the original signal components. Compared with the existed extending method, the proposed method ensure that the extended sequence is continual at the two ends and agree with original fluctuant trend, it is a low complexity and efficient method, which fit for periodic or quasi-periodic signal whose frequency modulation range is narrow¿Simulation results show the validity of the method.