High-Resolution ISAR Imaging with Wideband V-FM Waveforms

Abstract

V-FM waveforms, composed of two chirp signals with the opposite slopes, can also achieve high range resolution with wide bandwidth via intrapulse frequency modulation. In this paper, a framework for inverse synthetic aperture radar (ISAR) imaging of moving targets with V-FM waveforms is investigated, where the range compression of the received signals is achieved by the dual-channel dechirping and the azimuth compression is done via the traditional Fourier transform (FT). The two corresponding reconstructed temporary high-resolution range profiles (HRRPs) from the double channels are synthesized for the HRRPs of the target, in which one is flipped from left to right and added to the other. Then the final HRRPs are arranged into a two-dimensional (2D) array and the azimuth compression is done via FT to achieve the ISAR imaging after the motion compensation. Simulated trials, adopting the scattering center modeling of the Yak-42 plane, are used to validate the correctness of the analyses and the finally well-focused images greatly support the effectiveness of V-FM waveforms in ISAR imaging.

Applying Polarimetric Target Decomposition to 2D Turntable ISAR Imagery of a Complex Vehicle

“…is task usually requires a training set of ground-truth images for a typical range of target and data collection parameters. In particular, wide-angle collections have recently received increasing attention owing to the need for high-resolution imagery [1][2][3][4][5]. However, target signatures show strong uctuations as the aspect angle varies, and thus, a considerably large dataset should be gathered for a representative range of view angles.…”

Bistatic ISAR Imaging with a V-FM Waveform Based on a Dual-Channel-Coupled 2D-CS Algorithm

“…CS has been adopted to achieve high resolution and well-focused ISAR images using sparse sampling data [ 14 , 15 , 16 ]. ISAR imaging with wideband V-FM waveforms has been proposed in [ 17 ]. Gu and Pan et al in [ 12 ] adopted dual-channel CS-based dechirping (CS-D) to achieve high resolution range profiles (HRRPs) of V-FM waveforms.…”