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http://dx.doi.org/10.5515/KJKIEES.2016.27.1.69

A Study on the Rotational Motion Compensation Method for ISAR Imaging  

Kang, Byung-Soo (Department of Electronic Engineering, Pohang University of Science and Technology)
Bae, Ji-Hoon (Department of Electronic Engineering, Pohang University of Science and Technology)
Chung, Sung-Eun (Department of Electronic Engineering, Pohang University of Science and Technology)
Kim, Chan-Hong (Agency for Defense Development)
Kim, Kyung-Tae (Department of Electronic Engineering, Pohang University of Science and Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.27, no.1, 2016 , pp. 69-75 More about this Journal
Abstract
In this paper, we propose a inverse synthetic aperture radar(ISAR) rotational motion compensation(RMC) method to remove residual blurring caused by non-uniform rotational motion of a target. First, a range bin having an isolated scatterer is selected. Next, polynomial phase signal in the selected range bin is estimated by using both Fourier transform(FT) and polynomial-phase transform(PPT). Finally, a new slow time variable that uniformly samples radar signal along the aspect angle directions is defined by using the estimated phase signal, and we interpolate radar signal in terms of the new time variable. As a result, rotational motion to blurr ISAR images is removed, and focused ISAR images are obtained. Simulation results using battleship model validate the robustness and effectiveness of our proposed RMC method.
Keywords
Inverse Synthetic Aperture Radar(ISAR) Image; Rotational Motion Compensation(RMC);
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