Through the analyses to the linearity frequency modulation signal and the phase coding signal, we discusse a method of instantaneous frequency distilling on the base of instantaneous self correlation, and then, it matches the signal using a matching filt.

Diagnosis method of instantaneous frequency for rotor impact-rub fault of aeroengine;

Ultrasonic signal process method based on instantaneous frequency;

Study of analysis of instantaneous frequency in partial wave method;

Aiming at the characteristic of LFM radar signal,this paper analyzes the thoery of distilling instant frequency of LFM signal based on the means of instant phase firstly.

The technology of extracting instant frequency in digital reconnaissance receiver is given and realized by DSP.

According to the accuracy measuring instrument of local oscillator frequency agility radar,an example was presented in which SAWD technology was employed to derive instant frequency.

An approach using transient frequency analysis based on complex analytical wavelet transform is proposed in the paper.

In order to make up for this defect,the time-frequency analysis method of Hilbert-Huang transform(HHT)and the conception of transient frequency were introduced,and the empirical mode decomposition(EMD)and its time-frequency distribution abou.