| 基于属性散射中心模型的SAR超分辨成像算法 |
| |
| 引用本文： | 吴敏,张磊,段佳,邢孟道.基于属性散射中心模型的SAR超分辨成像算法[J].宇航学报,2014,35(9):1058-1064. |
| |
| 作者姓名： | 吴敏 张磊 段佳 邢孟道 |
| |
| 作者单位： | 西安电子科技大学雷达信号处理国家重点实验室，西安 710071 |
| |
| 基金项目： | 国家自然科学基金优秀青年基金（61222108）；中央高校基本科研业务费（K5051302001，K5051302078，K5051302038） |
| |
| 摘 要： | 基于属性散射中心模型，提出一种稳健而快速的SAR超分辨成像算法，在超分辨的同时能够考虑到目标的整体结构。首先利用改进的正交匹配追踪算法（OMP）对简化的属性散射中心模型进行参数估计，然后基于估计的模型参数在信号重构时进行二维频谱外推实现SAR超分辨成像。该算法具有较高的运算效率，相对于传统基于点散射模型超分辨算法，能够有效解决部件不连续的问题，并且初始指向角的利用可以取得良好的聚焦效果。仿真实验验证了该算法的优越性。
|
| 关 键 词： | 合成孔径雷达 超分辨成像 属性散射中心模型 |
| 收稿时间： | 2013-11-15 |
Super Resolution SAR Imaging Algorithm Based on Attribute Scattering Center Model |
| |
| WU Min,ZHANG Lei,DUAN Jia,XING Meng dao.Super Resolution SAR Imaging Algorithm Based on Attribute Scattering Center Model[J].Journal of Astronautics,2014,35(9):1058-1064. |
| |
| Authors: | WU Min ZHANG Lei DUAN Jia XING Meng dao |
| |
| Institution: | National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China |
| |
| Abstract: | To characterize physical properties of a scattering object, a steady and fast algorithm of super\|resolution SAR imaging is proposed based on attribute scattering center in this paper. An improved Orthogonal Matching Pursuit (OMP) algorithm is utilized to estimate the parameters of simplified attribute scattering center model. Based on the model parameters, two dimensional spectrum extrapolation is preformed in signal reconstruction to achieve super resolution SAR imaging. The method has fast computational efficiency and can accurately describe the physical structure compared with the traditional super resolution algorithm based on the point scattering model. In addition, the initial orientation angle can be used to achieve a better focusing performance. The simulation results validate the superiority of the proposed algorithm. |
| |
| Keywords: | Synthetic aperture radar(SAR) Super resolution imaging Attribute scattering center |
|
| 点击此处可从《宇航学报》浏览原始摘要信息 |
| 点击此处可从《宇航学报》下载免费的PDF全文 |
