Representation of ECG signals based on the instantaneous frequency estimation

Electrocardiogram (ECG) signals are nonstationary processes in nature. To present the nonstationarity, time-frequency analysis techniques are suitable tools since they represent signals simultaneously in both time and frequency. In this paper, the instantaneous frequency (IF) estimation technique is applied for analyzing ECG signals. This paper presents a new approach to the representation and analysis of the typical ECG signals. Results demonstrate that the non-stationary characteristics of the ECG signals can be clearly presented