29 July 1994 Aspect dependence of impulse radar extracted signature features in the combined time-frequency domain
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Abstract
We study the scattering interaction of electromagnetic pulses of short duration with a target of either simple or complex shape. The complex targets are plastic scale models of two aircraft with metallized surface. The form-function in the back-scattering direction, filtered by the complete system of radar and digitizing signal analyzer, is determined from measured data when the target is illuminated at each one of several different aspect angles. The experimental data are obtained with the aid of an impulse radar system located in an anechoic chamber. We examine the details of how various resonance features of the returned echo evolve in time using a PWD with a suitably selected Gaussian time-window. The results are displayed in a series of 3-D surface plots and 2-D contour plots together with the recorded waveforms and their spectra. Time-frequency signatures from the two scale models of aircraft are examined.
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Hans C. Strifors, Hans C. Strifors, B. Brusmark, B. Brusmark, Steffan Abrahamson, Steffan Abrahamson, Guillermo C. Gaunaurd, Guillermo C. Gaunaurd, } "Aspect dependence of impulse radar extracted signature features in the combined time-frequency domain", Proc. SPIE 2234, Automatic Object Recognition IV, (29 July 1994); doi: 10.1117/12.181021; https://doi.org/10.1117/12.181021
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