基于Chirp Z变换的合成孔径雷达成像算法是一种重要的频域类成像算法,文中对该算法进行了研究。首先给出时频域的算法表示,以及二维频域聚焦函数和新的相位补偿因子;其次推导了Chirp Z成像算法和常用Chirp Scal-ing成像算法在聚焦处理上的等效性,并对两种算法进行了比较分析。最后用点目标仿真和实际数据成像处理的结果验证了所述内容的有效性。

Chirp Z transform based imaging algorithm,an important frequency domain algorithm for synthetic aperture radar,was studied in this paper.Firstly,algorithm expression in time-frequency domain was presented,including focusing function in two dimensions frequency domain and a new phase compensation factor.Secondly,the equivalence of focusing ability between chirp Z algorithm and chirp scaling algorithm was introduced and compared.Lastly,point target simulation and real raw data processing validate the main content of this paper.

TN958