Time-Frequency Ridge-Based Parameter Estimation for Sinusoidal Frequency Modulation Signals

In this paper, the time-frequency (TF) ridge technique is employed to obtain the accurate parameters estimation of the sinusoidal frequency modulation (SFM) signals. By extracting the TF ridge, a high energy-concentrated time-frequency representation (TFR) of the given signal can be obtained. And then a TF ridge-based method for estimating parameters of the SFM signal is proposed. The advantages of this method over the S-method-based method are (1) it can be easily implemented, (2) it costs less computation and storage space, and (3) it has a high precision. Numerical results provided in this paper show the superiority of the novel method.