[1]闫龙,郑妍,李颜超.改进的机载SAR相位梯度自聚焦算法[J].应用科技,2012,39(01):39-43.[doi:10.3969/j.issn.1009-671X.201110011]
 YAN Long,ZHENG Yan,LI Yanchao.Improved algorithm of phase gradient autofocus for air-borne synthetic aperture radar[J].Applied science and technology,2012,39(01):39-43.[doi:10.3969/j.issn.1009-671X.201110011]
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改进的机载SAR相位梯度自聚焦算法(/HTML)
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《应用科技》[ISSN:1009-671X/CN:23-1191/U]

卷:
第39卷
期数:
2012年01期
页码:
39-43
栏目:
现代电子技术
出版日期:
2012-04-05

文章信息/Info

Title:
Improved algorithm of phase gradient autofocus for air-borne synthetic aperture radar
文章编号:
1009-671X(2012)01-0039-05
作者:
闫龙1 郑妍1 李颜超2
1. 中国联合通信网络有限公司 哈尔滨分公司 黑龙江 哈尔滨 150001 ;2. 大庆石化公司 通讯中心,黑龙江 大庆163714
Author(s):
YAN Long1 ZHENG Yan1 LI Yanchao2
1. China United Telecommunications Corporation Harbin Branch, Harbin 150001, China; 2. Daqing Petrochemical Corporation, Communications Center, Daqing 163714, China
关键词:
合成孔径雷达多普勒调频率相位梯度自聚焦
Keywords:
synthetic aperture radar(SAR) Doppler rate phase gradient autofocus
分类号:
TN957
DOI:
10.3969/j.issn.1009-671X.201110011
文献标志码:
A
摘要:
相位梯度自聚焦算法的关键步骤是加窗处理,窗宽度的确定决定了成像效果,宽度过大将会引入大量的噪声,反之将无法包含足够成像用的散焦信息. 文中针对复杂场景中强散射点的划分不同,提出了一种改进的相位梯度自聚焦方法,该方法通过对强散射点的划分设定阈值,采用门限式加窗方法. 与原有相位梯度自聚焦方法成像的比较中,在分辨率和清晰度上优越于原有方法,最后使用机载雷达真实数据对该方法的有效性进行检验.
Abstract:
A key step in the algorithm of phase gradient autofocus(PGA) is width of the window, because the determination of the width of the window is very important, if the width of the window is too wide will be mixed with noise, or defocusing cannot contain enough information. In this paper, an improved algorithm of phase gradient autofocus is proposed based on strong distinction between the different scattering, Strong scattering by the algorithm of setting the threshold point of division, using the threshold-type windowing methods. The accuracy of the improved algorithm of phase gradient autofocus is better than the original algorithm, especially in the imaging of point target. Based on real airborne SAR data, the feasibility and validity of the algorithm are demonstrated in conclusion.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:中国博士后科学基金面上资助项目(20110491087).
作者简介:闫龙(1983-),男,硕士研究生,主要研究方向:电路与系统,E-mail:yanlong@hrbeu.edu.cn.
更新日期/Last Update: 2012-04-10