| MIMO-SAR等效相位中心误差分析与补偿 |
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| 引用本文： | 王力宝,许稼,皇甫堪,彭应宁. MIMO-SAR等效相位中心误差分析与补偿[J]. 电子学报, 2009, 37(12): 2688-2693 |
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| 作者姓名： | 王力宝 许稼 皇甫堪 彭应宁 |
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| 作者单位： | 1. 国防科技大学电子科学与工程学院,湖南长沙,410073
2. 清华大学电子工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金,航天科技重点创新基金,航空科学基金,部委预研基金,航天支撑基金 |
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| 摘 要： | 受等效相位中心误差的影响,多输入多输出合成孔径雷达(MIMO-SAR)方位成像结果存在"假峰"而导致成像质量下降.基于MIMO-SAR回波模型,本文推导了等效相位中心误差的解析表达式,并定量研究其对方位成像质量的影响.分析指出周期性的二阶相位误差是等效相位中心误差的决定因素,补偿该项误差能有效克服"假峰"的影响.理论分析和数值试验验证了本文分析和补偿方法的有效性.
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| 关 键 词： | 多输入多输出 合成孔径雷达 宽测绘带 高分辨率 等效相位中心 |
| 收稿时间： | 2008-08-14 |
Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR |
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| WANG Li-bao,XU Jia,HUANGFU Kan,PENG Ying-ning. Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR[J]. Acta Electronica Sinica, 2009, 37(12): 2688-2693 |
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| Authors: | WANG Li-bao XU Jia HUANGFU Kan PENG Ying-ning |
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| Affiliation: | WANG Li-bao1,XU Jia2,HUANGFU Kan1,PENG Ying-ning2(1.School of Electronic Science and Engineering,National University of Defense Technology,Changsha,Hunan 410073,China,2.Department of Electronic Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Due to the equivalent phase center error,the imaging quality of the Multiple-Input Multiple-Output synthetic aperture radar(MIMO-SAR) may be degraded with a series of spurious peaks in the cross-range direction.Based on a proposed model of MIMO-SAR,this paper derives the analytic expressions for the equivalent phase center error,and its influence on the imaging quality is studied.It is shown that the periodical quadratic phase error is a key factor in the equivalent phase center error,and its compensation m... |
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| Keywords: | multi-input multi-output (MIMO) synthetic aperture radar (SAR) wide-swath high-resolution equivalentphase center |
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