基于逆Radon变换的圆迹SAR三维成像算法OA北大核心CSTPCD

With the increasing application demand for synthetic aperture radar(SAR),the imaging mode of circular SAR appears,which solves the problem that the traditional linear trajectory SAR can only obtain two-dimensional slant distance images,and has higher application potentials in topographic mapping,building extrac-tion,disaster assessment and other fields.The existing circular SAR three-dimensional imaging algorithm still has such problems as large computation load and complex implementation,etc.through the combination of the slant distance geometric analysis of the circular SAR model and the echo signal model,the wave-number domain compensation function is designed,and the range compression curve is corrected to the sine curve with zero base-line.The inverse Radon transform is used to realize the two-dimensional focus of the sinusoidal curve of the tar-get.By stacking the two-dimensional imaging results of each height plane,three-dimensional imaging of the tar-get is realized.Finally,the imaging quality of the proposed algorithm is analyzed by simulation,and the effective-ness of 3-D imaging of the proposed algorithm is verified.