基于成像时间段的高海情舰船ISAR成像方法  

Ship ISAR Imaging Method in High Sea Condition Based on Optimal Imaging Time Selection

作　　者：尹松乔[1] 姜义成[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《雷达科学与技术》2010年第4期323-328,共6页Radar Science and Technology

基　　金：国家自然科学基金(No.60872100);教育部博士点基金(No.20092302110032)

摘　　要：针对高海情舰船目标ISAR成像时舰船随机摆动对于成像质量的影响,提出了一种基于多普勒中心的最优时间选取方法。该方法在舰船目标回波的实际数据中计算各个回波的多普勒中心频率,并根据多普勒中心曲线选取舰船目标的最优成像时间。文中给出了实现该方法的具体步骤,并选取了一段实测数据对该方法进行了验证。验证结果表明,采用文中提出的最优时间选取方法,可以提高ISAR成像的方位向分辨率,同时也可以在保证成像质量的前提下减少成像所需的运算难度。A method for selecting optimal imaging time is proposed to solve the problem of imaging ambiguity when there is random sway of ship target in high sea condition in inverse synthetic aperture radar（ISAR） application.The method calculates Doppler center from real echoes of ship target,then chooses optimal imaging time according to the change of Doppler center.This paper develops the process of realizing the method,and then applies it to a piece of real data.The result shows that by applying the method proposed by this paper,the cross-range resolution of ISAR picture is enhanced,and calculation burden could be relieved while the quality of the picture remained the same.

关 键 词：最优成像时间 多普勒中心 高海情 逆合成孔径雷达(ISAR) 

分 类 号：TN957.52[电子电信—信号与信息处理]