| 接收机的非理想性对复相关值测量的影响 |
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| 引用本文： | 赵锋,苗俊刚,万国龙,薛永.接收机的非理想性对复相关值测量的影响[J].北京航空航天大学学报,2008,34(8):896-899. |
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| 作者姓名： | 赵锋 苗俊刚 万国龙 薛永 |
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| 作者单位： | 北京航空航天大学 电子信息工程学院, 北京 100191 |
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| 基金项目： | 优秀人才支持计划，国家自然科学基金 |
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| 摘 要： | 分析了矩形模型接收机频率响应的非理想性对综合孔径微波辐射计复相关值测量的影响.频率响应非理想性包括中心频率不一致、带宽不一致、群延迟不一致、本振相位不一致及带内波动,它们通过条纹洗涤函数产生复相关值测量误差.分析结果表明,群延迟不一致与本振相位不一致是产生复相关值相位误差的主要原因,中心频率不一致、带宽不一致、群延迟不一致及带内波动是产生复相关值幅度误差的主要原因,通过噪声注入法可校正这些幅度和相位误差,并用以上理论对北航二维综合孔径微波辐射计(BHU-2D)校正前后的误差进行了估计.
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| 关 键 词： | 综合孔径微波辐射计 接收机频率响应 条纹洗涤函数 微波成像 |
| 收稿时间： | 2007-07-11 |
Impacts of imperfect receivers on complex correlation of 2D aperture synthesis microwave radiometer |
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| Zhao Feng,Miao Jungang,Wan Guolong,Xue Yong.Impacts of imperfect receivers on complex correlation of 2D aperture synthesis microwave radiometer[J].Journal of Beijing University of Aeronautics and Astronautics,2008,34(8):896-899. |
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| Authors: | Zhao Feng Miao Jungang Wan Guolong Xue Yong |
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| Institution: | School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | The impacts of receivers' rectangular frequency response imperfections on the complex correlation measurement of 2D aperture synthesis microwave radiometer were presented.These imperfections include center frequency imbalance,bandwidth imbalance,group delay imbalance,phase imbalance of local oscillator and in-band ripple.The analytical results show that the phase error of complex correlation mainly comes from group delay imbalance,phase imbalance of local oscillator,and that the amplitude error of complex c... |
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| Keywords: | aperture synthesis microwave radiometers frequency response fringe-washing function microwave imaging |
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