| 引用本文: | 董臻,朱国富,梁甸农,等.条带式合成孔径雷达数字聚束算法.[J].国防科技大学学报,2001,23(5):59-62.[点击复制] |
| DONG Zhen,ZHU Guofu,LIANG Diannong,et al.The Digitally-Spotlight Algorithm for Stripmap-Mode SAR[J].Journal of National University of Defense Technology,2001,23(5):59-62[点击复制] |
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| 条带式合成孔径雷达数字聚束算法 |
| 董臻, 朱国富, 梁甸农, 陈虹 |
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(国防科技大学 电子科学与工程学院, 湖南 长沙 410073)
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| 摘要: |
| 与聚束工作模式的合成孔径雷达(SAR)相比，条带式SAR能够在相同时间内对更大范围的区域进行微波成像。但是在分析条带式SAR图像时，往往需要着重分析某些局部热点区域(ROI,Region-Of-Interest)，而ROI外散射体的回波会降低ROI图像的对比度。本文的数字聚束(Digitally-Spotlight)算法可以在成像前将ROI外的回波“过滤”，实现等效的的聚束工作模式，从而提高SAR对比度。仿真验证了该算法的有效性。 |
| 关键词: 合成孔径雷达 数字聚束 参考信号 低通滤波 图像对比度 |
| DOI： |
| 投稿日期：2001-02-16 |
| 基金项目:国家部委基金项目资助(7.5.3.2) |
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| The Digitally-Spotlight Algorithm for Stripmap-Mode SAR |
| DONG Zhen, ZHU Guofu, LIANG Diannong, CHEN Hong |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073,China)
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| Abstract: |
| The Stripmap-mode SAR is able to image larger area during the same time than the Spotlight-mode SAR. There are always some ROIs which should be emphasized in the whole SAR image. But the signature from those scatters outside the ROI will decrease the contrast of ROI's image. The digitally-spotlight algorithm is able to filter the unwanted signature before imaging to achieve the equivalent purpose to spotlight-mode SAR and increase the contrast of the SAR image. The simulation results prove its validity. |
| Keywords: SAR digitally-spotlight refrence signal lowpass filter image contrast |
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