This paper concentrates on the cross-range resolution of Synthetic Aperture Radar(SAR) based on diving model.In comparison to the azimuth resolution,the cross-range resolution can manifest the two-dimensional resoluti...This paper concentrates on the cross-range resolution of Synthetic Aperture Radar(SAR) based on diving model.In comparison to the azimuth resolution,the cross-range resolution can manifest the two-dimensional resolution ability of the imaging sensor SAR correctly.The diving model of SAR is an extended model from the conventional stripmap model,and the cross-range resolution expression is deduced from the equivalent linear frequency modulation pulses' compression.This expression points out that only the cross-range velocity component of the horizontal velocity contributes to the cross-range resolution.Also the cross-range resolution expressions and the performance of the conventional stripmap operation,squint side-look operation and beam circular-scanning operation are discussed.The cross-range resolution expression based on diving model will provide more general and more accurate reference.展开更多
相对于平飞运动雷达,俯冲运动垂直向下的运动分量会引入额外的多普勒频率,对杂波的空时分布特性产生重要影响。本文针对弹载俯冲非正侧阵雷达,提出了一种俯冲运动空时信号模型,首先推导了多普勒频率与空间角度的耦合关系的一般表达式,...相对于平飞运动雷达,俯冲运动垂直向下的运动分量会引入额外的多普勒频率,对杂波的空时分布特性产生重要影响。本文针对弹载俯冲非正侧阵雷达,提出了一种俯冲运动空时信号模型,首先推导了多普勒频率与空间角度的耦合关系的一般表达式,并详细分析了在实际的阵面几何配置情况下,俯冲运动雷达杂波的空时分布特性,相应提出了适于俯冲运动的基于参数模型和配准补偿(parameter model and registration compensation,PM-RC)的杂波抑制方法。最后通过弹载雷达建模仿真分析了俯冲运动对杂波空时特性的具体影响,并验证了杂波抑制方法的有效性。展开更多
基金Supported by the Chinese Postdoctoral Science Foundation(No. 20080440300)the Fundamental Research Funds for the Central Universities
文摘This paper concentrates on the cross-range resolution of Synthetic Aperture Radar(SAR) based on diving model.In comparison to the azimuth resolution,the cross-range resolution can manifest the two-dimensional resolution ability of the imaging sensor SAR correctly.The diving model of SAR is an extended model from the conventional stripmap model,and the cross-range resolution expression is deduced from the equivalent linear frequency modulation pulses' compression.This expression points out that only the cross-range velocity component of the horizontal velocity contributes to the cross-range resolution.Also the cross-range resolution expressions and the performance of the conventional stripmap operation,squint side-look operation and beam circular-scanning operation are discussed.The cross-range resolution expression based on diving model will provide more general and more accurate reference.
文摘相对于平飞运动雷达,俯冲运动垂直向下的运动分量会引入额外的多普勒频率,对杂波的空时分布特性产生重要影响。本文针对弹载俯冲非正侧阵雷达,提出了一种俯冲运动空时信号模型,首先推导了多普勒频率与空间角度的耦合关系的一般表达式,并详细分析了在实际的阵面几何配置情况下,俯冲运动雷达杂波的空时分布特性,相应提出了适于俯冲运动的基于参数模型和配准补偿(parameter model and registration compensation,PM-RC)的杂波抑制方法。最后通过弹载雷达建模仿真分析了俯冲运动对杂波空时特性的具体影响,并验证了杂波抑制方法的有效性。
