UWB ISAR Imaging of Near Field Rotating Target with Large Angle

Xu, Yanyun; Zhang, Qunying; Fang, Guangyou

doi:10.3724/sp.j.1146.2010.01335

Cited by 3 publications

(1 citation statement)

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“…But for high-resolution imaging with large bandwidth and large rotation angle, due to the unpredictability of non-cooperative target, it is usually impossible to continuously observe a target for long, resulting in incomplete azimuth data reception, which is called sparse aperture (SA) [5] . Also due to the improvement of resolution, the phenomenon of Migration Through Resolution Cells (MTRC) caused by the rotation in CPI can no longer be ignored [6] , which will seriously affect the actual imaging effect of the target. In these cases, the imaging performance of the traditional R-D algorithm will decline rapidly, so it is necessary to study a high-resolution ISAR imaging method suitable for large bandwidth and large rotation angles.…”

Section: Introductionmentioning

confidence: 99%

A High-Resolution Imaging Method for ISAR Based on Sparse Reconstruction

Fang

Yang

Xie

et al. 2023

J. Phys.: Conf. Ser.

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For the problem of first-order and second-order range migration in ISAR imaging under the condition of wide angle and wide bandwidth, a method for sparse azimuth data is proposed to obtain high-resolution ISAR images. After stretch processing, envelope alignment and residual video phase removal, the sparse recovery algorithm that sparse base is constructed by the Keystone transform is used to achieve range migration correction and the missing range profile reconstruction, and then the second-order phase estimation method based on fractional Fourier transform is used to estimate and compensate the second-order rotational phase. Simulation results show the method can effectively improve the imaging quality.

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Section: Introductionmentioning

confidence: 99%