Phase Error Suppression by Low-pass Filtering for Synthetic Aperture Imaging Ladar

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 空间激光信息技术研究中心

	Phase Error Suppression by Low-pass Filtering for Synthetic Aperture Imaging Ladar
	Sun, Zhiwei ; Hou, Peipei ; Zhi, Yanan ; Sun, Jianfeng ; Zhou, Yu ; Xu, Qian ; Lu, Zhiyong ; Liu, Liren
	2014
会议名称	conference on unconventional imaging and wavefront sensing
通讯作者	sun, zw (reprint author), chinese acad sci, shanghai inst opt & fine mech, key lab space laser commun & detect technol, pob 800-211, shanghai 201800, peoples r china.
英文摘要	compared to synthetic aperture radar (sar), synthetic aperture imaging ladar (sail) is more sensitive to the phase errors induced by atmospheric turbulence, undesirable line-of-sight translation-vibration and waveform phase error, because the light wavelength is about 3-6 orders of magnitude less than that of the radio frequency. this phase errors will deteriorate the imaging results. in this paper, an algorithm based on low-pass filtering to suppress the phase error is proposed. in this algorithm, the azimuth quadratic phase history with phase error is compensated, then the fast fourier transform (fft) is performed in azimuth direction, after the low-pass filtering, the inverse fft is performed, then the image is reconstructed simultaneously in the range and azimuth direction by the two-dimensional (2d) fft. the high-frequency phase error can be effectively eliminated hence the imaging results can be optimized by this algorithm. the mathematical analysis by virtue of data-collection equation of side-looking sail is presented. the theoretical modeling results are also given. in addition, based on this algorithm, a principle scheme of optical processor is proposed. the verified experiment is performed employing the data obtained from a sail demonstrator.
收录类别	CPCI
会议录	unconventional imaging and wavefront sensing 2014
会议录出版者	spie-int soc optical engineering
语种	英语
内容类型	会议论文
源URL	[http://ir.siom.ac.cn/handle/181231/17162]
专题	上海光学精密机械研究所_空间激光信息技术研究中心
作者单位	1.[Sun, Zhiwei 2.Hou, Peipei 3.Zhi, Yanan 4.Sun, Jianfeng 5.Zhou, Yu 6.Xu, Qian 7.Lu, Zhiyong 8.Liu, Liren] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Space Laser Commun & Detect Technol, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Sun, Zhiwei,Hou, Peipei,Zhi, Yanan,et al. Phase Error Suppression by Low-pass Filtering for Synthetic Aperture Imaging Ladar[C]. 见:conference on unconventional imaging and wavefront sensing.