一种双天线SAR运动目标成像系统仿真

Xitong Fangzhen Xuebao / Journal of System Simulation(2009)

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Abstract
提出了一种DPCA联合MDCFT的双天线SAR运动目标成像系统.将MDCFT变换应用于经过DPCA杂波对消后的信号,在MDCFT幅值平面内同时完成对运动目标的检测和多普勒参数的估计.建立了适合SAR系统的MDCFT模型,对杂波对消后回波数据的MDCFT幅度值分析证明了该方法的可行性"和有效性.在分数阶博立叶域进行滤波以消除杂波对相位的影响,进而利用通道间的相位差和多普勒中心频率对运动目标准确定位.利用大量的仿真实验对该系统的功能进行了验证.
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Key words
DPCA (displaced phase center antenna),Fractional fourier domain,Linear frequency modulation signal,MDCFT (modified discrete chirp-fourier transform),Moving-targets imaging,Parameter estimation,SAR (synthetic aperture radar)
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