Conventional algorithms for synthetic aperture radar uses the matched filter and convolves the data with a reference phase signal which changes with range. Its frequency domain implementation is cumbersome. This effects the quality of SAR image. 传统SAR算法在进行聚焦时候都利用了匹配滤波器,数据的相位都要随着距离变化,而且频域处理很繁杂,影响了SAR成像的精度和质量。