自适应Chirplet分解的ISAR成像方法  

An ISAR imaging algorithm based on adaptive Chirplet decomposition

作　　者：王勇[1] 姜义成[1] 

机构地区：[1]哈尔滨工业大学电子工程技术研究所,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2008年第9期1397-1399,1407,共4页Journal of Harbin Institute of Technology

摘　　要：为了提高机动目标的逆合或孔径雷达(ISAR)成像质量,提出了一种新的ISAR成像算法,通过将每一距离单元的回波数据进行自适应Chirplet分解,并采用松弛(RELAX)技术来提高参数估计精度,得到了高质量的瞬态ISAR像.外场实测数据成像结果验证了本文方法的有效性.In order to improve the quality of the ISAR images for maneuvering targets, a new ISAR imaging algorithm is proposed by decomposing the echo of each range bin into a series of Chirplets adaptively, and the RELAX technique is used to improve the precision of parameters estimation, then the ISAR image with high quality at different time is achieved. The result of real data indicates the validity of the new method proposed.

关 键 词：ISAR 机动目标 自适应Chirplet分解 

分 类 号：TN957.52[电子电信—信号与信息处理]