基于多散射中心联合抽取的步进频雷达成像方法

针对步进频雷达复杂目标抽取一维距离像时存在的多散射中心幅度损失问题，提出了一种基于多散射中心的联合抽取算法.方法根据目标最强散射中心，利用逆向舍弃法得到参考距离像，然后提取目标多散射中心峰值，并由强到弱得出能抽取到相应散射中心峰值的多组抽取起始点集合，依次对这些集合取交集，作为最佳抽取起始点.该方法确定的抽取起始点能够抽取到尽可能多的散射中心峰值，并且各散射中心的测距精度更高.经计算机仿真和实测数据验证，该方法抽取效果优于逆向舍弃法等传统抽取方法. 

Range Profile Extraction Method Based on Cooperative Multi-Scatters for Stepped Frequency Radar

An improved range profile extraction algorithm based on multi-scatters was proposed to solve the problem of scatters'' amplitude loss during the complicated target''s range profile extraction in the stepped frequency radar. First, according to the target''s highest peak of scatters, a reference range profile was extracted based on the inverse discard method. Then the target''s multiple scatters were extracted, and the sets of extraction starting points were obtained based on each scatter''s peak in the descending order of amplitude. Then the intersection among these sets was successively calculated as the ideal starting point. This algorithm can extract as many scatters'' peak amplitude as possible, and the range measurement of each scatter is more accurate. Simulation results and field measured data demonstrate the advantages of the proposed method over the others.