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High-Resolution Spaceborne SAR Processing Using the Decomposed Transfer Function

机译:使用分解传递函数的高分辨率星载SAR处理

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In this paper, a new analytic decomposed transfer function (DTF) for spaceborne synthetic aperture radar processing is calculated using the stationary phase approximation and Taylor's series expansion. The DTF copes with large Doppler centroid variations and executes range cell migration correction, secondary range compression, azimuth compression, and higher order effects. A fourth-order (DTF4) and fifth-order (DTF5) algorithms have been implemented using segmented block processing. It is shown that the DTF4 yields high quality 3-look target responses at azimuth resolution 0.3 m and range resolution 0.5 m at low squint (yaw = 0.3°) for X-band. At higher squint (yaw = 7.5°) the DTF5 has to be used to obtain adequate image quality.
机译:在本文中,使用平稳相位近似和泰勒级数展开,计算了一种用于星载合成孔径雷达处理的新的解析分解传递函数(DTF)。 DTF可应对大的多普勒质心变化,并执行距离像元迁移校正,二次距离压缩,方位角压缩和更高阶的效果。已经使用分段块处理实现了四阶(DTF4)和五阶(DTF5)算法。结果表明,对于X波段,在低斜视(偏航= 0.3°)下,方位角分辨率为0.3 m且距离分辨率为0.5 m时,DTF4产生高质量的三眼目标响应。在斜视角度较高(偏航= 7.5°)时,必须使用DTF5以获得足够的图像质量。

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