Radar signal modulation identification method of instantaneous frequency characteristics

The invention discloses a radar signal modulation identification method based on instantaneous frequency characteristics, and relates to the technical field of radar signal modulation identification, and the method comprises the steps: obtaining a first signal, and carrying out the segmentation processing of the first signal, and forming a second signal; performing discrete sampling on each second signal and then recombining the second signals to form a third signal; performing window length traversal on the third signal by using a logarithmic window energy criterion; calculating an instantaneous frequency value of the third signal; mapping the midpoint time in the window length and the instantaneous frequency value to form a time-frequency mapping pair; the third signal is identified based on the time-frequency mapping pair. According to the method, the relative fitting deviation of the radar signals is roughly classified and judged, then the time-frequency ridge curves with the relative fitting deviation la