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Two-Dimensional Spectrum for Circular Trace Scanning SAR Based on an Implicit Function

机译:基于隐函数的圆轨迹扫描SAR二维谱

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摘要

For circular trace scanning synthetic aperture radar (CTSSAR), the conventional approximated quadratic range equation assumption does not hold due to the impact of the curved flight path. Thus, existing SAR methods cannot focus the target accurately and efficiently in CTSSAR. To address this problem, the stationary phase can be regarded as an implicit function of the Doppler frequency. Therefore, the 2-D spectrum can be consequently achieved by employing the principle of stationary phase. In this letter, an imaging algorithm based on the derived spectrum is developed for CTSSAR. Promising results from simulation demonstrate the validity and effectiveness of the approach.
机译:对于圆形迹线扫描合成孔径雷达(CTSSAR),由于弯曲的飞行路径的影响,传统的近似二次距离方程假设不成立。因此,现有的SAR方法无法在CTSSAR中准确有效地聚焦目标。为了解决这个问题,可以将固定相位视为多普勒频率的隐式函数。因此,可以通过采用固定相原理来获得二维光谱。在这封信中,针对CTSSAR开发了基于导出光谱的成像算法。仿真的有希望的结果证明了该方法的有效性和有效性。

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