Adaptive spectrogram for time-frequency signal analysis

A novel method for the determination of the window parameters of adaptive spectrograms is given in this paper. It is based on detecting the maximum value and the width of the peak of the Radon transform of the modulus of the ambiguity function of the signals. The proposed method effectively reduces the cross-terms and the noise of linear frequency modulated signals compared with the Wigner distribution and the classical fix window spectrogram. A possible further extension of the method is also given to fit it to larger classes of signals