HHT and a New Noise Removal Method

摘要

The Hilbert-Huang Transform (HHT) is a new method, developed by Huang et al in late 1990's, for analyzing nonlinear and non-stationary signals. The basic method of HHT is described, the difference between it and other methods used for analyzing instantaneous frequency is analysed, and the law of its HMD and the characteristics of the EMD components (IMFs) of any signal with white noise are studied. Based on these studies, we developed a new white noise removal method―EMD Noise Removal Method is developed. Some examples are given to prove the validity of the EMD Noise Removal Method.