一种ISAR目标转动估计和方位定标方法  

Target rotation estimation and azimuth scaling for ISAR

作　　者：逄勃[1] 张然[2] 张磊[3] 

机构地区：[1]海军驻南京地区雷达系统军事代表室,南京210003 [2]中国船舶重工集团公司第七二四研究所,南京210003 [3]西安电子科技大学,西安710071

出　　处：《雷达与对抗》2013年第2期40-44,57,共6页Radar & ECM

摘　　要：获得精确目标转角信息对于逆合成孔径雷达(ISAR)成像至关重要。通过精确的转角估计不仅可实现转动补偿提高ISAR聚焦性能,也是实现成像方位定标的必需条件。本文提出一种稳健的ISAR目标转角估计方法,该方法以目标成像的聚焦程度作为代价函数,通过交替迭代优化求解目标的有效转角速度和加速度,继而实现精确转动补偿和成像方位定标。仿真和实测数据实验验证了该方法的有效性。It is vital for the inverse synthetic aperture radar （ISAR） imaging to get the precise information about the target rotation angles. The precise rotation angle estimation can realize the rotation compensation to boost the focusing performance of the ISAR, and also be indispensable to realize the azimuth scaling of the imaging. A method of estimating the rotation angles for the ISAR is presented. With the focusing degree of the target imaging as the cost function, the valid velocity and acceleration of the rotation angles are obtained through the alternating iteration to realize the precise rotation compensation and azimuth scaling of the imaging. The simulation and test data verify the effectiveness of the method.

关 键 词：逆合成孔径雷达 运动补偿 方位定标 转角估计 

分 类 号：TN957.52[电子电信—信号与信息处理]