线性调频步进体制ISAR相干干扰方法  

A Coherent Jamming Approach of Frequency-stepped Chirp ISAR

作　　者：于涛[1] 池龙[1] 冯有前[2] 李长栋[3] 朱丰[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077 [2]空军工程大学理学院,西安710051 [3]空军航空大学航空理论系,长春130022

出　　处：《现代雷达》2010年第7期53-57,62,共6页Modern Radar

基　　金：国家自然科学基金资助项目(60971100);陕西省自然科学基础研究计划基金资助项目(2007F28)和(SJ08F10)

摘　　要：逆合成孔径雷达(ISAR)是在合成孔径雷达(SAR)技术基础上发展起来的一种新的微波成像雷达体制,是雷达成像的重点发展方向之一。由于其成像是通过对距离向和方位向二维压缩实现,因此比普通雷达具有更强的抗干扰能力。线性调频步进信号由于其独特的优点在成像中占据了重要地位。文中提出了一种利用步进频率信号对线性调频步进信号体制ISAR的相干干扰方法,以较小的功率干扰ISAR成像。ISAR is a kind of new microwave imaging system on the basis of developing of SAR imaging technology. It is the one of important development directions of imaging radar. Because of its imaging via two-dimension compress （range and cross-range compress）, its anti-jamming capability is stronger than that of traditional radars. Frequency-stepped chirp signal is very significant in ISAR imaging due to its special advantages. In this paper, a new coherent jamming approach against frequency-stepped chirp ISAR by using frequency-stepped signal is proposed, and ISAR images can be contaminated by using the method with comparatively low power.

关 键 词：线性调频步进信号 相干干扰 粗高分辨距离像 精高分辨距离像 二维ISAR像 

分 类 号：TN974[电子电信—信号与信息处理]