Application of Phase Frequency Measuring Method in Radar Pulse Carrier Frequency Measuring
Wang Lei;Cao Silei;Zeng Weigui;Administrant Brigade of Postgraduate,Navay Aeronautical University;Department of Scientific & Research,Navay Aeronautical University;
Pulse carrier frequency measuring is very important in the radar passive signal sorting, in order to improve the accuracy of the radar signal carrier frequency feature extraction, the phase frequency measuring method is introduced in this paper. The original signal is converted into complex signal by using the Hilbert transform, and the phase and instantaneous frequency corresponding to each sampling point are obtained. The mean frequency of each point is taken as the signal carrier frequency characteristic. The phase frequency measuring method is compared with the Fourier transform method and the counting method. The results show that the accuracy of the phase frequency measuring method is better than the Fourier transform method and the counting method in the case of low carrier frequency and short pulse width. Therefore, the phase frequency measuring method which is applied to the radar carrier frequency feature extraction, can effectively improve the accuracy and stability of frequency measurement. It provides support and guarantee for radar passive signal sorting and identification in complex background.
【CateGory Index】： TN957.51