| 用于VHF/UHF波段SAR成像的改进型NLCS算法 |
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| 引用本文： | 武拥军,吴先良.用于VHF/UHF波段SAR成像的改进型NLCS算法[J].合肥工业大学学报(自然科学版),2009,32(3). |
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| 作者姓名： | 武拥军 吴先良 |
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| 作者单位： | 1. 安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039;解放军电子工程学院,微波教研室,安徽,合肥,230037
2. 安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039 |
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| 摘 要： | 文章分析了VHF/UHF波段合成孔径雷达的成像特点及其对成像算法的要求,提出用高阶相位滤波来消除距离与方位向之间的高阶相位耦合,用非线性CS技术来消除距离变化引入到二次距离压缩中的残余相位误差,从而得到了一种适用于VHF/UHF波段SAR成像的改进型NLCS算法.通过仿真验证了算法的有效性,该算法对于VHF/UHF波段SAR成像具有较高的实用价值.
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| 关 键 词： | VHF/UHF波段 合成孔径雷达 相位误差 三次相位滤波 NLCS算法 |
A modified NLCS algorithm for VHF/UHF SAR imaging |
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| WU Yong-jun,WU Xian-liang.A modified NLCS algorithm for VHF/UHF SAR imaging[J].Journal of Hefei University of Technology(Natural Science),2009,32(3). |
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| Authors: | WU Yong-jun WU Xian-liang |
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| Institution: | 1.Key Lab of Intelligent Computing & Signal Processing of the Ministry of Education;Anhui University;Hefei 230039;China;2.Microwave Teaching and Research Division;Electronic and Engineering Institute of the PLA;Hefei 230037;China |
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| Abstract: | The imaging features of VHF/UHF SAR and their demands for the imaging algorithm are analyzed.A high-order phase filter is used to eliminate the high-order phase coupling between the range and the azimuth,the nonlinear CS algorithm is used to remove the residual phase error of the secondary range compression(SRC) due to the range-dependent variation,and a modified NLCS algorithm for VHF/UHF SAR is gained.Through the simulation test,the algorithm is verified and the performance of the algorithm is discussed b... |
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