| 一种双站合成孔径雷达的高分辨率成像与合成方法 |
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| 引用本文： | 钟华,宋广华,杜昌平.一种双站合成孔径雷达的高分辨率成像与合成方法[J].上海交通大学学报,2014,48(3):317-322. |
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| 作者姓名： | 钟华 宋广华 杜昌平 |
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| 作者单位： | （1.杭州电子科技大学 通信学院， 杭州 310018；2.浙江大学 航空航天学院， 杭州 310027） |
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| 基金项目： | 国家自然科学基金(61301248);中国航空科学基金(20120576001);中国博士后科学基金面上项目(2011M501000) |
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| 摘 要： | 针对合成孔径雷达难以提高系统固有分辨率,分析了双站合成孔径雷达之间的频谱关系,提出了一种距离向分辨率自动合成方法.基于该方法,双站合成孔径雷达高分辨率成像处理流程可以分为2步:首先,采用改进的双站非线性Chirp-Scaling算法得到高质量的子图像对;然后,利用子图像对之间存在的频谱偏移关系,利用分辨率自动合成算法将子图像对合成为分辨率更高的图像,从而完成双站合成孔径雷达的高分辨率成像处理.仿真结果表明,该处理技术及成像方法可以得到较好的高分辨率成像效果.
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| 关 键 词： | 双站合成孔径雷达 距离向分辨率 自动合成 |
| 收稿时间： | 2013-04-14 |
Imaging and Auto-Combination Processing Technique for Bistatic Synthetic Aperture Radar |
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| ZHONGHua;SONG Guang-hua;DU Chang-ping.Imaging and Auto-Combination Processing Technique for Bistatic Synthetic Aperture Radar[J].Journal of Shanghai Jiaotong University,2014,48(3):317-322. |
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| Authors: | ZHONGHua;SONG Guang-hua;DU Chang-ping |
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| Institution: | (1. School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China; 2. School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, 310028, China) |
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| Abstract: | To improve the inherent resolution of synthetic aperture radar (SAR), the relationship between the spetrums of bistatic SAR (BiSAR) was analyzed and a novel range resolution auto-combination method was proposed in this paper. Based on the proposed method, the whole procedure was divided into two steps: First, the raw echo of BiSAR was well focused by an modified nonlinear chirp scaling algorithm, where no interpolation was required. Secondly, an auto-combination technique based on image quality was introduced to combine sub-images into an improved resolution image. Simulation results show that this technique is effective and robust. |
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| Keywords: | bistatic synthetic aperture radar range resolution auto-combination |
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