| 低频UWB SAR的冲击响应函数 |
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| 引用本文： | 邹鲲,梁甸农. 低频UWB SAR的冲击响应函数[J]. 信号处理, 2006, 22(3): 329-332 |
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| 作者姓名： | 邹鲲 梁甸农 |
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| 作者单位： | 中国人民解放军国防科技大学电子科学与工程学院 |
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| 摘 要： | 提取系统的冲击响应函数(impulse response function,IRF)是测量雷达系统性能指标的前提,IRF来自理想点目标的雷达图像。对于低频超宽带合成孔径雷达(ultra wide band synthetic aperture radar,UWB SAR),参考点目标的电磁散射特性是频率和方位角的函数,不满足理想点目标的散射特性要求。本文从IRF的定义出发,结合低频UWBSAR系统处理模型,利用二维数字聚焦方法消除杂波的影响,同时利用低频电磁散射数值建模的方法计算参考点目标的电磁散射特性,最后给出了计算系统IRF的方法。
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| 关 键 词： | 低频超宽带合成孔径雷达 冲击响应函数 电磁散射模型 |
| 修稿时间： | 2004-11-03 |
Impulse Response Function of Low Frequency UWB SAR |
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| Zou Kun,Liang Diannong. Impulse Response Function of Low Frequency UWB SAR[J]. Signal Processing(China), 2006, 22(3): 329-332 |
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| Authors: | Zou Kun Liang Diannong |
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| Abstract: | Extraction of the synthetic aperture radar( SAR) system impulse response function(IRF)from the SAR image of a point target is the premise of system performance measurement. For the low frequency and ultra wide band(UWB) SAR system, the reference point target, of which scattering characteristic is the function of frequency and aspect angle, cannot approximate to be an ideal point target. In this paper, based on the definition of the IRF, with the low frequency UWB SAR processing model, using the low frequency e-lectromagnetic scattering numerical model of the reference point target and the 2D digital focusing algorithm to reduce the clutter, the computation method of the system IRF is proposed. |
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| Keywords: | Low frequency UWB SAR IRF Electromagnetic scattering model |
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