In this letter, we propose a method for estimating the center of rotation on an experimental radar imaging. The experiment is performed with tomographic approach to obtain the radar cross section images of the target on a rotation table. In an ultrahigh-resolution imaging using tomographic reconstruction, precise knowledge of rotation center of the turntable position is necessary since this has a big influence on the image quality. The position of rotation center can be physically measured, but the result is not accurate due to the delay introduced by the RF components and cables. Thus, we present a method to precisely determine the rotation center based on the rotational symmetry of the received data. The proposed method is verified by doing imaging of several targets using ultrawideband radar with picosecond-length pulses. The system bandwidth is larger than 30 GHz, and the imaging results have subcentimeter resolution.
Bibliographical noteFunding Information:
Manuscript received May 11, 2017; revised June 4, 2017; accepted June 5, 2017. Date of publication June 8, 2017; date of current version August 7, 2017. This work was supported in part by the Ministry of Science, ICT, and Future Planning, Korea, under the ICT Consilience Creative Program (IITP-2017 - 2017-0-01015) supervised by the Institute for Information & Communications Technology Promotion, in part by the Civil-Military Technology Cooperation Program, and in part by the Electronic Warfare Research Center at the Gwangju Institute of Science and Technology, and originally funded by the Defense Acquisition Program Administration and Agency for Defense Development. (Corresponding author: Min-Ho Ka.) The authors are with the School of Integrated Technology, Yonsei Institute of Convergence Technology, Yonsei University, Incheon 21983, South Korea (e-mail: firstname.lastname@example.org; email@example.com; kaminho@ yonsei.ac.kr).
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering