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This paper is focused on the feature extraction techniques of radar high range resolution profiles (HRRPs). In order to release the translational sensitivity of HRRPs, two translation invariant features, the central moments and distribution entropy, are extracted from the HRRPs and combined to form a new feature vector. Experiment on real data of three airplanes in flight is implemented to evaluate...
Real time ISAR imaging of maneuvering targets is studied, when the target's maneuverability is not too serious and the Doppler variation of scatterer sub-echoes can be approximated as a first order polynomial. A FRFT (fractional Fourier transform) based ISAR range-instantaneous Doppler (RID) imaging algorithm of maneuvering targets is presented. In this algorithm, the FRFT, instead of FFT, is employed...
Translational motion compensation is the key problem in inverse synthetic aperture radar (ISAR) imaging. It is usually accomplished in two steps: range alignment and phase compensation. The calculation load of range alignment is the heaviest in ISAR imaging processing. In order to meet the requirements of real time ISAR imaging, a novel range alignment algorithm is proposed in this paper. This algorithm...
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