Su Zhijin
ABSTRACT
Frequency Hopping communication is widely used in communication countermeasures. In order to realize effective tracking interfere to frequency hopping signal, it is necessary to estimate parameters of frequency hopping signal quickly and accurately. In this paper, an estimation method of hopping rate of frequency hopping Signal based on wavelet transform is proposed. Under the background of strong computing power of the current processor, the smooth pseudo Wigner-Ville distribution with high precision and good attenuation of cross terms is used to obtain the time-frequency distribution of the signal. The peak value of time-frequency distribution in the time axis is extracted as the signal for further processing. Then, the wavelet transform of appropriate scale is selected to carry out on the signal. Finally, Fourier transform is carried out to extract the peak value and estimate hopping rate of the signal. Experimental results show that this method has strong anti-noise performance and high stability.
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Cross Ref
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