基于时间延时的调频步进频率ISAR欺骗干扰  

Deception Jamming Against ISAR based on Frequency-stepped Chirp Signal with the Time Delay

作　　者：张振锋[1] 朱丰[2] 池龙[1] 张群[1,3] 冯有前[2] 

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]复旦大学波散射与遥感信息国家教育部重点实验室,上海200433

出　　处：《火力与指挥控制》2010年第7期25-28,共4页Fire Control & Command Control

基　　金：国家自然科学基金(60971100)(60672032);陕西省自然科学基础资助项目(2007F28)(SJ08F10)

摘　　要：逆合成孔径雷达由于其独特的成像原理,具有比普通雷达更强的抗干扰能力。调频步进信号具有在保持瞬时带宽较小的同时通过合成宽带技术获得距离高分辨,降低系统实现的复杂度的优点,提出了一种基于时间延时的对调频步进信号体制成像雷达欺骗干扰方法,利用对调频步进雷达接收到的回波信号进行距离向延时和方位向延时后转发,从而合成假目标对调频步进频率ISAR进行欺骗干扰。仿真结果表明这种方法行之有效。ISAR based on frequency-stepped chirp signal has greater capability of anti-jamming than that of the conventional radar due to its peculiar characteristic. Frequency-stepped chirp signal can achieve total large bandwidth while maintaining narrow instantaneous bandwidth, thus reducing the complexity of radar systems. A method of jamming the ISAR imaging is proposed, where the received signal is retransmitted after the time delay has been done on the cross-range and the range. Therefore the false targets can be constructed and the deception jamming against frequency-stepped ISAR is successfully accomplished. Simulations are given to validate the effectiveness of the proposed method.

关 键 词：电子对抗 线性调频步进信号 图像合成 假目标 欺骗干扰 

分 类 号：TN95[电子电信—信号与信息处理]