Extraction Method for the Characteristic Points of Missile Targets Based on Compound Filter
In order to solve the problem that wavelet transform is difficult to extract the character-istic points time of radar missile targets under the condition of low signal-to-noise ratio,a composite filter method including three-layer filter structure is proposed.Through STFT filter,Butterworth band-pass filter and wavelet transform,the noise and main target signals of missiles are filtered,and the de-tectability of the characteristic points time in the wavelet reconstruction waveform under the condition of low signal-to-noise ratio is greatly improved,which extends the application range of wavelet trans-form in radar missile target characteristic point extraction.The effectiveness of this method is verified by an example application and data comparison.
radar measurementextraction of characteristic pointscompound filterwavelet trans-form
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