Rotation Center Estimation Algorithm for ISAR Image of the Space Target Based on Image Rotation and Correlation

Lin SHI; Baofeng GUO; Juntao MA; Chaoxuan SHANG; Hui XIE; Huiyan ZENG

doi:10.11999/JEIT181086

Volume 41 Issue 6

Jun. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(6): 1280-1286

Lin SHI, Baofeng GUO, Juntao MA, Chaoxuan SHANG, Hui XIE, Huiyan ZENG. Rotation Center Estimation Algorithm for ISAR Image of the Space Target Based on Image Rotation and Correlation[J]. Journal of Electronics & Information Technology, 2019, 41(6): 1280-1286. doi: 10.11999/JEIT181086

Citation:

Lin SHI, Baofeng GUO, Juntao MA, Chaoxuan SHANG, Hui XIE, Huiyan ZENG. Rotation Center Estimation Algorithm for ISAR Image of the Space Target Based on Image Rotation and Correlation[J]. Journal of Electronics & Information Technology, 2019, 41(6): 1280-1286. doi: 10.11999/JEIT181086

Citation:

Lin SHI, Baofeng GUO, Juntao MA, Chaoxuan SHANG, Hui XIE, Huiyan ZENG. Rotation Center Estimation Algorithm for ISAR Image of the Space Target Based on Image Rotation and Correlation[J]. Journal of Electronics & Information Technology, 2019, 41(6): 1280-1286. doi: 10.11999/JEIT181086

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Rotation Center Estimation Algorithm for ISAR Image of the Space Target Based on Image Rotation and Correlation

doi: 10.11999/JEIT181086

Department of Electronic and Optical Engineering, Army Engineering University Shijiazhuang Campus Shijiazhuang 050003, China

Funds: The National Natural Science Foundation of China (61601496)

Received Date: 2018-11-26
Rev Recd Date: 2019-02-25

Available Online: 2019-03-05

Publish Date: 2019-06-01

Abstract

Abstract

The equivalent rotation center should be estimated accurately in the Inverse Synthetic Aperture Radar (ISAR) for the issue of image defocusing induced by the Migration Through Resolution Cells (MTRC). In this paper, an equivalent rotation center estimation algorithm based on image rotation and correlation is proposed for the space target. First, the instantaneous imaging mechanism of ISAR is analyzed. Second, two images with different observation angles are obtained by using the echo data with the same motion compensation algorithm. Finally, the equivalent rotation center is estimated based on the scaled image pixel rotation and image correlation. Consequently, the estimated position of the rotation center is obtained, when the assumed rotation center is in accordance with the real one and the maximum correlation coefficient of two images is achieved. The results demonstrate the effectiveness and robustness of the proposed algorithm.
- Inverse Synthetic Aperture Radar (ISAR),
- Space target,
- Rotation center estimation,
- Image rotation,
- Image correlation

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References(22)

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