where C is a constant. Therefore, the time resolutionbecomes arbitrarily good at high frequencies, while thefrequency resolution becomes arbitrarily good at lowfrequencies [13]. This property helps to overcome thelimitation of Short Time Fourier Transforms (STFT) inwhich the time–frequency resolution is fixed. In orderfor an inverse wavelet transform to exist, the motherwavelet should satisfy the admissibility condition