Full Aperture Imaging Algorithm of Airborne Synthetic Aperture Ladar

被引：0
|
作者：
Yin H. [1 ]
Guo L. [1 ,2 ]
Yang L. [3 ]
Sun G. [3 ]
Xing M. [3 ]
Zeng X. [1 ]
机构：
[1] School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, 710071, Shaanxi
[2] State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei, 230037, Anhui
[3] National Key Laboratory of Radar Signal Processing, Xidian University, Xi'an, 710071, Shaanxi
来源：
Guangxue Xuebao/Acta Optica Sinica | 2019年 / 39卷 / 09期
关键词：
Full-aperture imaging; Minimum entropy self-focusing; Phase compensation; Remote sensing; Synthetic aperture ladar;
D O I：
10.3788/AOS201939.0928002
中图分类号：
学科分类号：
摘要：
Synthetic aperture ladar (SAL) is a combination of synthetic aperture and ladar, which has developed rapidly in recent years. Since the wavelength of the SAL is short, high-resolution imaging can be achieved in a short period of time. However, short wavelength also brings other problems. For airborne SAL, the wavelength is less than the vibration amplitude of the airplane by 1-2 order of magnitude, and the vibration of the airplane results in a great phase error to the echo. It is difficult for the inertial navigation system (INS) to achieve the positioning accuracy at the laser wavelength level, so the data-based self-focusing is necessary in SAL imaging. In this paper, a full aperture imaging algorithm based on minimum entropy autofocus (MEA) and deramp is proposed to process the SAL real data. The imaging results verify the effectiveness of the proposed algorithm. © 2019, Chinese Lasers Press. All right reserved.
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