| 基于图像质量评估的MIMO-SAR等效相位中心误差界 |
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| 引用本文： | 王力宝,许稼,皇甫堪,彭应宁.基于图像质量评估的MIMO-SAR等效相位中心误差界[J].清华大学学报(自然科学版),2010(4). |
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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： | 国防科技大学电子科学与工程学院;清华大学电子工程系; |
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| 基金项目： | 国家自然科学基金资助项目(60901087); 部委预研资助项目(9140A07051208JW0111); 航天科技创新基金资助项目(CASC200904); 航空科学基金资助项目(20080158001) |
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| 摘 要： | 受等效相位中心误差的影响,新体制的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。该文提出基于虚假旁瓣比、积分旁瓣比及峰值能量损失等图像质量指标联合评价"假峰"对SAR成像质量的影响,进而确定MIMO-SAR等效相位中心误差界,为系统设计和信号处理提供了依据。结果表明:当等效相位中心误差超过0.2rad时,一般需要对其进行补偿以满足常规指标要求;星载系统较机载系统更适合等效相位中心处理,通常可忽略等效相位中心误差的补偿环节。
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| 关 键 词： | 多输入多输出合成孔径雷达(MIMO-SAR) 等效相位中心误差 假峰 图像质量 |
Equivalent phase center error bound in MIMO-SAR based on image quality evaluation |
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| WANGLibao,XUJia,HUANGFUKan,PENGYingning.Equivalent phase center error bound in MIMO-SAR based on image quality evaluation[J].Journal of Tsinghua University(Science and Technology),2010(4). |
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| Authors: | WANGLibao XUJia HUANGFUKan PENGYingning |
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| Institution: | WANG+Libao1,XU+Jia2,HUANGFU+Kan1,PENG+Yingning2(1.+School+of+Electronic+Science+,+Engineering,National+University+of+Defense+Technology,Changsha+410073,China,2.+Department+of+Electronic+Engineering,Tsinghua+University,Beijing+100084,China) |
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| Abstract: | The image quality of novel multi-input multi-output synthetic aperture radar (MIMO-SAR) may be degraded with a series of spurious peaks in the cross-range direction due to equivalent phase center error. The influence of spurious peaks on image quality was analyzed by evaluating SAR image quality using the guidelines of spurious side lobe ratio,integral side lobe ratio and peak power loss. The equivalent phase center error bound in MIMO-SAR was then determined,which benefits MIMO-SAR system design and signal... |
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| Keywords: | multi-input multi-output synthetic aperture radar (MIMO-SAR) equivalent phase center error spurious peak image quality |
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