ISAR phase correction imaging algorithm based on fractional gradient descent method

In this paper, the fractional stepwise descent method is used to realize the phase correction method of minimizing the Tsallis entropy. This algorithm utilizes the Tsallis entropy of a two-dimensional image to achieve autofocus for radar images. The Tsallis entropy is gradually minimized, resulting in the autofocus of the radar image. The results of Matlab simulation data proved that compared to the other two commonly used methods, this method has good focusing effect and Rate of convergence., and achieves a good compromise between the two.