ISAR Autofocus Imaging Algorithm for Maneuvering Targets Based on Phase Retrieval and Keystone Transform
Joint Authors
Shi, Hongyin
Yang, Ting
Liu, Yue
Si, Jingjing
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-03-26
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
In the current scenario of high-range resolution radar and noncooperative target, the rotational motion parameters of the target are unknown and migration through resolution cells (MTRC) is apparent in the obtained inverse synthetic aperture radar (ISAR)images, in both slant-range and cross-range directions.
In the case of the high-speed maneuvering target with a small value of rotation, the phase retrieval algorithm can be applied to compensate for the translational motion to form an autofocusing image.
However, when the target has a relatively large rotation angle during the coherent integration time, phase retrieval method cannot get an acceptable image for viewing and analysis as the location of the scatterer will not be true due to the Doppler shift imposed by the target’s rotational motion.
In this paper, a novel ISAR imaging method for maneuvering targets based on phase retrieval and keystone transform is proposed, which can effectively solve the above problems.
First, the keystone transform is used to solve the MTRC effects caused by the rotation component.
Next, phase errors caused by the remaining translational motion will be removed by employing phase retrieval algorithm, allowing the scatterers are always kept in their range cells.
Finally, the Doppler frequency shifts of scatterers will be time invariant in the phase of the received signal.
Furthermore, this approach does not need to estimate the motion parameters of the target, which simplifies the processing steps.
The simulated results demonstrate the validity of this method.
American Psychological Association (APA)
Shi, Hongyin& Yang, Ting& Liu, Yue& Si, Jingjing. 2019. ISAR Autofocus Imaging Algorithm for Maneuvering Targets Based on Phase Retrieval and Keystone Transform. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1158171
Modern Language Association (MLA)
Shi, Hongyin…[et al.]. ISAR Autofocus Imaging Algorithm for Maneuvering Targets Based on Phase Retrieval and Keystone Transform. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1158171
American Medical Association (AMA)
Shi, Hongyin& Yang, Ting& Liu, Yue& Si, Jingjing. ISAR Autofocus Imaging Algorithm for Maneuvering Targets Based on Phase Retrieval and Keystone Transform. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1158171
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158171