Adaptive Instantaneous Frequency Estimation Based on EMD and TKEO

An adaptive approach to the estimation of the instantaneous frequency (IF) of non-stationary and nonlinear multi-component signals is presented. This method relates to the newly developed empirical mode decomposition (EMD) and Teager Kaiser energy operator (TKEO). EMD can adaptively decompose signal into a series of zero mean amplitude modulation-frequency modulation (AM-FM) intrinsic mode functions (IMFs). TKEO can track the instantaneous frequency (IF) and the instantaneous amplitude (IA) of the AM-FM component at any time instant. Two simulated signals are conducted to evaluate the effectiveness of the proposed method. Simulation results show that EMD and TKEO are effectively applied to signal of multi-component for the extraction of instantaneous frequency.