Study on Time-Frequency Calculation and Analysis Method of Frequency Spectrum Characteristic of Transient Frequency Conversion Signal

The transient frequency conversion signal has the characteristics of short time and time-varying frequency. At present, the frequency spectrum of the interference signal can only be measured by the receiver 0-SPAN mode, which has many problems, such as high cost and time consuming. On the basis of summing up the advantages and disadvantages of time-frequency calculation and analysis methods for transient frequency conversion signals, this paper puts forward a new method of time-frequency computation and analysis of full spectrum filtering and one-sided sparse sample of transient frequency conversion signal. The results of verification show that the proposed calculation and analysis method has high accuracy, wide range of application and reasonable calculation speed.