| 一种差分SAR层析高分辨成像方法 |
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| 引用本文： | 孙希龙,余安喜,董臻,梁甸农.一种差分SAR层析高分辨成像方法[J].电子与信息学报,2012,34(2):273-278. |
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| 作者姓名： | 孙希龙 余安喜 董臻 梁甸农 |
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| 作者单位： | 国防科技大学电子科学与工程学院 长沙410073 |
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| 基金项目： | 国家自然科学基金，国防科技大学科研计划 |
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| 摘 要： | 城区建筑的4维成像是差分SAR层析的重要应用领域之一。此种应用背景下，如何利用空间-时间2维平面内稀疏分布的观测数据，在保持方位向-距离向分辨率的同时实现高程向-形变速率向的高分辨成像是差分SAR层析面临的难点问题。在确定性点目标模型下，基于松弛(RELAX)算法，该文提出了一种适用于城区建筑目标的差分SAR层析高分辨成像方法。与统计模型下的空间谱估计方法相比，该方法无需多视处理，能够保持方位向-距离向分辨率。与奇异值分解方法相比，该方法具有更优的高程向-形变速率向分辨能力。在仿真实验和Envisat-ASAR实测数据处理中，该方法的有效性得到了验证。
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| 关 键 词： | 合成孔径雷达 差分层析 高分辨 松弛算法 |
| 收稿时间： | 2011-07-03 |
| 修稿时间： | 2011-10-31 |
A High Resolution Imaging Method for Differential SAR Tomography |
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| Sun Xi-long
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Yu An-xi
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Dong Zhen
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Liang Dian-nong.A High Resolution Imaging Method for Differential SAR Tomography[J].Journal of Electronics & Information Technology,2012,34(2):273-278. |
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| Authors: | Sun Xi-long Yu An-xi Dong Zhen Liang Dian-nong |
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| Institution: | (School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | Four-dimensional reconstruction of urban areas and man-made infrastructure is one of the most important applications of differential SAR tomography.In this situation,the urgent problem of differential SAR tomography is how to achieve satisfying elevation-velocity resolution using sparse samples of space-time plane and preserve azimuth-range resolution simultaneously.An imaging method for differential SAR tomography based on RELAXation(RELAX) algorithm is proposed in the framework of deterministic models.Compared the spatial spectral estimation methods with statistical model,this method do not need to implement a spatial multilooking.Compared with the singular value decomposition method,this method has much better resolution.Results obtained by processing simulated data and real data of ENVISAT-ASAR verify the promising potentiality of this method. |
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| Keywords: | SAR Differential tomography High resolution RELAXation(RELAX) algorithm |
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