On the choice of parameters for the Chirplet transform

Considering that the Chirplet transform (CT) results can not efficiently present the time-frequency (TF) representations of a signal without suitable parameters, a measurement method was proposed on how to choose the optimal values of parameters of the Chirplet transform for the signal to be analyzed. Different from the method used in the modified Chirplet transform, in our method the problem of the scale parameter selection is transformed into that of parameters optimization. The best scale parameter depends on the input of the chirp rate both in time and frequency. Suitable choose of the two parameters as input can get the best scale parameter. With these three parameters the Chirplet transform results will have much higher TF resolution. The dual-component chirp signals and the seismic sedimentary signal are analyzed with this method, and it is found that in the TF plane the two Chirp signals can be clearly presented which can not be distinguished by the short-time-Fourier-transform and the wavelet transform, and the rules of rhyming of the sedimentary signal can be exactly depicted. This shows that the method is a powerful tool for the sedimentary signal analysis using the seismic data.