Signal identification method based on time-frequency image

The invention discloses a signal identification method based on a time-frequency image, which belongs to the field of frequency spectrum management and control, and comprises the following steps: S1, establishing a signal time-frequency image sample library: carrying out frequency spectrum data acquisition on different signals, acquiring frequency spectrum data of a selected duration for each pattern as first-class data, and endowing the first-class data with category label information, storing in a spectrum signal sample library; mapping a selected number of frequency spectrum data into a grey-scale map containing time, frequency and energy according to an acquisition time sequence, and generating a plurality of grey-scale maps in a sliding window mode according to a selected step length, so as to generate a sample library based on time-frequency image recognition, namely completing establishment of a signal time-frequency image sample library; and S2, performing signal identification by using the establishe