ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume IV-3
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-3, 61–64, 2018
https://doi.org/10.5194/isprs-annals-IV-3-61-2018
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-3, 61–64, 2018
https://doi.org/10.5194/isprs-annals-IV-3-61-2018

  23 Apr 2018

23 Apr 2018

JOINT PROCESSING OF ENVELOPE ALIGNMENT AND PHASE COMPENSATION FOR ISAR IMAGING

Tao Chen, Guanghu Jin, and Zhen Dong Tao Chen et al.
  • School of Electronic Science and Engineering, National University of Defense Technology, 410073 Changsha, P.R. China

Keywords: Envelope Alignment, Phase Compensation, ISAR, Joint Processing

Abstract. Range envelope alignment and phase compensation are spilt into two isolated parts in the classical methods of translational motion compensation in Inverse Synthetic Aperture Radar (ISAR) imaging. In classic method of the rotating object imaging, the two reference points of the envelope alignment and the Phase Difference (PD) estimation are probably not the same point, making it difficult to uncouple the coupling term by conducting the correction of Migration Through Resolution Cell (MTRC). In this paper, an improved approach of joint processing which chooses certain scattering point as the sole reference point is proposed to perform with utilizing the Prominent Point Processing (PPP) method. With this end in view, we firstly get the initial image using classical methods from which a certain scattering point can be chose. The envelope alignment and phase compensation using the selected scattering point as the same reference point are subsequently conducted. The keystone transform is thus smoothly applied to further improve imaging quality. Both simulation experiments and real data processing are provided to demonstrate the performance of the proposed method compared with classical method.