MIMO-ISAR成像空时等效误差校正方法  

Space-time equivalent errors correction in MIMO-ISAR imaging

作　　者：董会旭[1] 张永顺[1] 冯存前[1] 胡晓伟[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《系统工程与电子技术》2015年第11期2487-2491,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61382166);陕西省自然科学基础研究计划(2014JM8308)资助课题

摘　　要：针对多输入多输出逆合成孔径雷达(multiple-input multiple-output inverse synthetic aperture radar,MIMO-ISAR)成像中的空时不等效问题,首先建立了空时等效误差模型,并对模型进行了分析,然后推导出空时等效误差的校正模型,得出了空时等效误差的校正矩阵,且该误差校正矩阵只与空时等效失配率有关。采用特显点方位像熵最小对空时等效失配率进行了估计,并利用它构建出空时等效误差的校正矩阵,实现了MIMO-ISAR空时等效误差的校正。仿真验证了这一方法的有效性。In view of the nonequivalent relationship between the space sampling and time sampling in multi pie-input multiple-output inverse synthetic aperture radar （MIMO-ISAR）, an space-time quivalent errors model is established and analyzed firstly. Subsequently, a formula which can correct the equivalent errors model be- tween space and time is inferred. The error correction matrix is acquired, which only concerns with the space- time equivalent miss matched rate. Space-time equivalent miss matched rate is estimated by the minimum cross- range image entropy method. Then the errors correction matrix is structured and space-time equivalent errors are corrected. The simulation results verify the validity of the proposed algorithm.

关 键 词：多输入多输出逆合成孔径雷达成像 空时等效失配率 空时等效误差校正 

分 类 号：TN957[电子电信—信号与信息处理]