ISAR目标中频回波模拟器设计  

A Design of ISAR IF Echo SimulatorLIU Chao-jun,WANG Wei,CHEN Zeng-ping

作　　者：刘朝军[1] 王伟[1] 陈曾平[1] 

机构地区：[1]国防科技大学ATR实验室,长沙410073

出　　处：《现代雷达》2006年第1期6-8,共3页Modern Radar

基　　金：国家"863"资助项目(2002AA731130)

摘　　要：介绍了一种ISAR目标中频回波模拟器的设计实现方法:首先以固定点目标为例,分析了ISAR目标的中频回波信号特点;然后根据信号特点,介绍了基于AD9857正交数字上变频器的中频回波信号产生技术;最后给出了信号模拟中相参性问题的解决方法。经过实践证明,该模拟器产生的信号相位稳定,频谱纯度高,并具有复杂波形生成的能力。该模拟器已经成功地在某型高分辨率空间目标跟踪探测雷达的研制过程中得到应用。A design and implementation method of ISAR target IF echo is introduced. At first, the ISAR IF echo characteristics are analyzed, taking a stationary point-target as an example. Then, according to the signal property, the signal generation technique based on AD9857 quadrature digital upconverter is introduced. At last, how to solve the problem of signal coherence is described. According to practice, this simulator has stable signal phase, pure signal spectrum, and ability to produce any complex waveform. In the development process of one kind of high resolution radar used for space target searching and tracking, this simulator has been successfully employed.

关 键 词：逆合成孔径雷达 回波模拟 AD9857芯片 正交数字上变频 

分 类 号：TN955[电子电信—信号与信息处理]