同相位梯度自聚焦算法相比，最小熵算法无需在图像域分离出强点目标，因而特别适用于无任何明显特征的图像。

Compared with the PGA autofocus algorithm, the minimum entropy algorithm needs not isolate prominent point target in image domain and is especially suitable for the images without specific ch...

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在现有的相位补偿方法中，相位梯度自聚焦（PGA）算法是较好的一种。

Of the existing phase compensation methods, the phase gradient autofocus (PGA) algorithm is a better one.

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研究了机载合成孔径雷达运动补偿中可以补偿任意阶相位误差的相位梯度自聚焦(pga)算法，提出一种PGA快速算法。

PGA algorithm, which can compensate any-order phase error in airborne SAR motion compensation, is discussed in this article. A fast PGA algorithm is also proposed.

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