电波科学学报2025，Vol.40Issue(2)：371-380,10.DOI:10.12265/j.cjors.2024053
线性调频雷达信号的拉伸变换干扰及特性研究
Stretching transform jamming and characteristics of linear frequency modulation radar signal
摘要
Abstract
With the mature development and wide application of digital ratio frequency memory(DRFM),DRFM-based coherent forwarding jamming has become the mainstream of radar jamming technology.Coherent forwarding jamming has the outstanding advantages of high forwarding efficiency and strong coherence,and the processing algorithm in the digital domain is flexible and efficient,which can produce complex and diverse jamming effects.However,after a lot of practice,it is found that when it is necessary to produce a large-scale continuous interference effect,if the jammer adopts dense forwarding,it will not only increase the amount of DRFM computation sharply,but also destroy the constant mode constraint,resulting in a serious decrease in the power amplifier efficiency of the jammer.Based on this situation,this paper proposes a tensile transformation jamming method for linear frequency modulation(LFM)radar signals,which compresses and broadens the pulse width and bandwidth of radar signals in the digital domain,i.e.,tensile transformation,and then radiates them to the radar receiver.After the tensile signal is processed by matching filtering,it will present a large-scale continuous coherent interference effect,which is affected by the tensile transformation factor,which is flexible and adjustable,and the tensile transformation interference satisfies the constant mode constraint.关键词
相干转发干扰/线性调频(LFM)/拉伸变换干扰/恒虚警检测Key words
coherent repeater jamming/linear frequency modulation(LFM)/stretching transform jamming/constant false alarm rate分类
信息技术与安全科学引用本文复制引用
王陶然,庞晨,祝迪,安孟昀,王福来,李永祯..线性调频雷达信号的拉伸变换干扰及特性研究[J].电波科学学报,2025,40(2):371-380,10.基金项目
国家自然科学基金(62301580,61921001) （62301580,61921001）
