Application of S-transform for removing baseline drift from ECG

The three major sources of noise in an ECG signal are baseline drift, powerline interference and other electromagnetic interferences. With the recent success of Wavelet transform in identifying and eliminating noise from a wide variety of signals, frequency transformation techniques are gaining more and more importance for eliminating noise from ECG signals. This paper applies S-transform in eliminating baseline wander from ECG signals and the proposed approach is subsequently compared with the method based on wavelet transform.