雷达目标模拟器LFM信号线性度校准研究  

Research on LFM signal linearity calibration in radar target simulator

作　　者：王旭东[1] 潘明海[1] 蒋晓红 梁志国[3] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016 [2]中航雷达与电子设备研究院,无锡214063 [3]北京长城计量测试技术研究所,北京100095

出　　处：《仪器仪表学报》2011年第10期2388-2392,共5页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61071164);南京航空航天大学基本科研业务费专项科研项目(NS2010109)资助

摘　　要：线性调频(LFM)信号由于其良好的时-频聚集性,被广泛应用于雷达系统中,其频率随时间变化的线性程度,对雷达测距精度及距离分辨率影响很大。为准确模拟雷达LFM回波信号,对雷达目标模拟器所产生的LFM信号,必须进行线性度校准。本文提出了一种基于小波变换的雷达目标模拟器LFM信号线性度校准算法,通过对来自不同模拟器的大量实测数据的实验测试,证明了算法的有效性,校准精度优于0.1%。LFM（linear frequency modulated） signal is broadly used in radar system due to its good time-frequency concentration ability.However,radar range measurement precision and distinguishing ability tightly relies on the linearity of LFM signal.In order to simulate LFM radar echoes precisely,linearity calibration has to be carried out for the LFM signals produced by radar target simulator.This paper proposes a novel LFM signal linearity calibration method based on wavelet transformation for radar target simulator.The method has been verified with mass lab data acquired from different radar target simulators,and the calibration accuracy is better than 0.1%,which proves the effectiveness of the method.

关 键 词：雷达目标模拟器 LFM信号 线性度校准 

分 类 号：TN911[电子电信—通信与信息系统]