基于多特显点综合的SAR/ISAR自聚焦  

The SAR/ISAR autofocus based on the multiple dominant scatterers synthesis

作　　者：黄源宝[1] 郑义明[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2001年第1期105-109,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目! (6 98310 40 ) ;电科院科技预研资助项目!(7 4 2 1)

摘　　要：利用积累 (相干或非相干 )提高信杂噪比的概念 ,并考虑实际存在的问题 ,对基于多特显点的自聚焦原理进行了综合研究 ,进而对现在应用较多的两种方法做了比较 ,并对PGA法进行了改进 .Many SAR/ISAR autofocus methods have been presented and are successfully used in reality, some of which are based on the multiple dominant scatterers synthesis. They synthesize multiple scatterers to increase the signal to clutter and noise ratio (SCNR), consequently increasing the precision of the estimation of he initial phase error. The comparison between the methods has been made in a lot of literature. But they only compare the results of computer simulation or real data. Based on the concept of coherent/incoherent accumulation to increase the SCNR and considering the existing problems, we discuss the SAR/ISAR autofocus methods based on the multiple dominant scatterer synthesis and compare the performance of these methods. Finally, an improved PGA algorithm is presented.

关 键 词：SAR/ISAR自聚焦 多特显点综合 逆合成孔径雷达 

分 类 号：TN958[电子电信—信号与信息处理]