Heart rate variability signal analysis based on HHT

A new method of heart rate variability signal analysis based on Hilbert-Huang Transform (HHT) is proposed. Use EMD (Empirical Mode Decomposition) method to decompose signal into a series of IMF (Intrinsic Mode Function). By means of the given boundary conditions and EMD decomposition termination conditions, calculate and analyze instantaneous frequency and instantaneous amplitude of each IMF using HHT, obtain the intrinsic information contained in signal and the sudden change instant and the shifting trend of heart rate variability. Analyzing real heart rate signal with wavelet analysis and HHT method, the comparable experiment result proves that HHT method is feasible and shows its advantages with respect to wavelet analysis method.