一篇详细介绍驻定相位原理和方法的文章，首先介绍了驻定相位原理的定义和方法，然后对SAR成像处理中需要使用的线性调频信号进行快时间的FFT-A detailed article in the principles and methods of the given phase, first introduced in principle given phase definitions and methods, and then SAR imaging process chirp signal you want to use the FFT fast time