采用Chirp变换实现宽带DRFM的技术  

Research on Broadwidth DRFM Adopting Chirp Transform

作　　者：刘璐[1] 

机构地区：[1]西安电子科技大学电子信息攻防对抗与仿真技术教育部重点实验室,陕西西安710071

出　　处：《电子科技》2012年第1期93-95,107,共4页Electronic Science and Technology

摘　　要：宽带线性调频雷达,采用Dechirp信号处理降低信号处理带宽,并能获取大带宽信号处理增益;但对雷达干扰而言,由于采用非匹配处理,无法在较低处理带宽条件下实现DRFM干扰。文中采用Dechirp信号处理的思想,给出了基于Chirp变换的宽带DRFM实现技术,该方法通过Dechirp变换,DRFM和Chirp变化重构雷达信号,理论分析和仿真验证表明,能较好保留雷达照射信号的时频特征,同时较大地降低了信号处理带宽。Broadband linear frequency modulation radar adopts Dechirp signals to reduce the bandwidth of the signal, and to obtain a huge processing gain of the broad bandwidth. Because of unmatched signal processing, it is difficult to realize the DRFM based jamming through narrowband processing. Illumed by Dechirp signal processing, this paper presents a broadband DRFM based on Chirp transform. The method can reconstruct radar signals through Deehirp transform, DRFM and Chirp transform. Theoretical analysis and simulation show that this method can reserve the time frequency characteristics and lower the processing bandwidth.

关 键 词：解线频调 Chirp变换 DRFM 

分 类 号：TN957.51[电子电信—信号与信息处理]