In the algorithm, the phase gradient algorithm (PGA) was performed, and the signals of multiple scatters on a few range bins were utilized.
该算法采用了相位梯度算法(PGA)的处理结构，利用了多个距离单元上的散射点信号。
If the scatter selected in phase gradient algorithm(PGA) algorithm is not isolated, the accuracy of the phase error estimation will be degraded.
当相位梯度算法挑选的散射点不是孤立散射点时，导致相位误差估计的准确性下降。
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