摘要
间歇采样转发干扰属于一类脉内相干欺骗干扰,其运用欠采样原理,在距离维上产生多个虚假的目标峰,从而干扰真实目标的检测与跟踪。为了解决这一问题,该文提出了一种基于波形域的匹配滤波前抗间歇采样转发干扰方法。首先,考虑到间歇采样转发干扰的部分匹配特性,该文在匹配滤波过程中引入了扩展域,即波形域,以研究干扰信号与真实目标回波信号元素的局部特征,并在每个波形域上定义了自适应的阈值函数。其次,引入卡尔曼滤波对波形域信号进行状态估计,通过自适应阈值检测筛选出波形域信号中的有效积分元素与无效积分元素,并建立关于有效积分元素的估计状态空间。最后,在抑制波形域信号中的无效积分元素的同时,从有效积分元素的估计状态空间中补充相应长度的积分元素,保留剩余的有效积分元素,通过积分得到不含虚假目标的距离像结果。该文所提方法不倚赖于任何干扰机参数等先验信息,即可有效抑制间歇采样转发干扰。仿真实验表明,与传统方法相比,该文方法实现的抗间歇采样转发干扰性能更优。
Interrupted Sampling Repeater Jamming(ISRJ)falls within the category of intrapulse coherent deception interference.ISRJ employs the principle of undersampling to engender multiple spurious target peaks on the range profile,thereby disrupting the detection and tracking of genuine targets.To address this challenge,this study introduces a novel method grounded in the waveform domain to mitigate ISRJ before matched filtering.First,considering the partial matching attributes of ISRJ,an expanded domain,specifically the waveform domain,is incorporated into the matched filtering.This augmentation enables the investigation of local features within the interference signals and components of authentic target echo signals.Moreover,adaptive threshold functions are defined for each waveform domain.Subsequently,the introduction of the Kalman filter enables the state estimation of waveform domain signals.Additionally,valid and invalid integral elements are discriminated within the waveform domain signals via adaptive threshold detection,and a state space estimation is formulated,specifically concerning the valid integral elements.In conclusion,by suppressing the invalid integral elements within the waveform domain signals,the proposed approach simultaneously supplements the estimated state space of valid integral elements with their corresponding length components.This preservation of residual valid integral elements,coupled with integration operation,yields a range profile outcome devoid of deceptive interference artifacts.Importantly,the approach proposed herein operates independently of any prior information regarding the interference device parameters,thereby substantially reducing the effect of ISRJ.Simulation experiments illustrate that,in comparison with traditional methodologies,the method proposed in this study exhibits remarkably superior resistance against the ISRJ interference challenges.
作者
苏汉宁
潘嘉蒙
鲍庆龙
郭福成
胡卫东
SU Hanning;PAN Jiameng;BAO Qinglong;GUO Fucheng;HU Weidong(State Key Laboratory of Automatic Target Recognition,National University of Defense Technology,Changsha 410073,China;State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China)
出处
《雷达学报（中英文）》
EI
CSCD
北大核心
2024年第1期240-252,共13页
Journal of Radars
基金
国家自然科学基金(62201594,62231026)。
关键词
波形域
抗间歇采样转发干扰
匹配滤波
自适应
Waveform domain
Anti-interrupted sampling repeater jamming
Matched filtering
Adaptability
