Inverse synthetic aperture ladar imaging based on modified cubic phase function
Inverse synthetic aperture imaging ladar (ISAL) can achieve high-resolution images, and yet it faces pulse-to-pulse high-order phase errors that the microwave radar can ignore. The high-order phase errors are almost caused by mechanical vibrations in general, which blur the azimuth focusing effect....
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| Veröffentlicht in: | Applied optics (2004) 2021-03, Vol.60 (7), p.2014-2021 |
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| container_end_page | 2021 |
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| container_issue | 7 |
| container_start_page | 2014 |
| container_title | Applied optics (2004) |
| container_volume | 60 |
| creator | Gao, Si Zhang, Zenghui Yu, Wenxian Wu, Manqing Li, Guangzuo |
| description | Inverse synthetic aperture imaging ladar (ISAL) can achieve high-resolution images, and yet it faces pulse-to-pulse high-order phase errors that the microwave radar can ignore. The high-order phase errors are almost caused by mechanical vibrations in general, which blur the azimuth focusing effect. This paper presents an ISAL imaging model to obtain high-resolution images. A novel modified cubic phase function (CPF) algorithm is proposed to compensate the additional high-order phase errors. Some high-resolution well-focused ISAL simulation images and real target images are shown to validate the methods. It is shown that the third-order phase errors are compensated by the distinctive digital signal process and the image entropy of real target images is reduced significantly. |
| doi_str_mv | 10.1364/AO.413512 |
| format | Article |
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| ispartof | Applied optics (2004), 2021-03, Vol.60 (7), p.2014-2021 |
| issn | 1559-128X 2155-3165 1539-4522 |
| language | eng |
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| source | Alma/SFX Local Collection; Optica Publishing Group Journals |
| subjects | Algorithms Aperture imaging Digital imaging High resolution Image resolution Signal processing Synthetic apertures Target recognition |
| title | Inverse synthetic aperture ladar imaging based on modified cubic phase function |
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