ISAR舰船目标成像时间段选取

Time selection for ship target ISAR imaging

摘要:

定义了图像对比度准则,并提出一种基于该准则的成像时刻和成像积累时间选取的快速算法.针对ISAR舰船目标成像特点,提出一种简化算法确定舰船目标的最优俯视图或侧视图的成像时刻.从该时刻开始积累回波,通过使图像对比度最大来获得最佳成像积累时间.实测数据处理的结果验证了本文算法的有效性和实用性.

Abstract:

The selection of interval of ISAR ship target includes selection of time position and selection of length of the time window.A definition of image contrast is given and a fast algorithm to select the time position and the length of the time window which bases on image contrast is proposed in this paper.According to the features of ISAR ship imaging,a simplified algorithm to determine optimal time position of top view or side view ship images is presented.Integrated echoes from that time,the optimal coherent time will be obtained by making the image contrast maximum.The effectiveness and practicability of the method are proven by real data processing.