CAJ | 학술논문

针对单通道LFM引信欺骗干扰抑制问题，提出了一种基于时频解耦盲分离( TFD-BSS)的干扰抑制算法。该方法首先通过Stretch变换将时频混叠的LFM信号转化为两差频信号，然后利用自适应滤波技术滤出干扰差频信号，并对其进行二次Stretch变换将干扰差频转化为欺骗信号以构造虚拟通道，从而将欠定盲分离转化为非欠定问题，最后通过延时差量法将干扰滤除。实验仿真表明，回波和干扰延时相差5 ns以上即可取得良好的分离效果。该方法不仅可为引信抗欺骗干扰提供借鉴，也是单通道盲分离算法的理论扩展。
침대단통도LFM인신기편간우억제문제，제출료일충기우시빈해우맹분리( TFD-BSS)적간우억제산법。해방법수선통과Stretch변환장시빈혼첩적LFM신호전화위량차빈신호，연후이용자괄응려파기술려출간우차빈신호，병대기진행이차Stretch변환장간우차빈전화위기편신호이구조허의통도，종이장흠정맹분리전화위비흠정문제，최후통과연시차량법장간우려제。실험방진표명，회파화간우연시상차5 ns이상즉가취득량호적분리효과。해방법불부가위인신항기편간우제공차감，야시단통도맹분리산법적이론확전。
An algorithm based on time-frequency decoupling BSS ( TFD-BSS ) is proposed to solve the problem of single-channel deception jamming suppression of LFM fuze. First, the method transforms the signal of time-frequency mixed LFM fuze into two difference frequencies,and then filters out the deception difference frequency signal using the technique of adaptive filtering,and constructs a virtual channel by the second stretch transformation which can transform the jamming difference frequency into deception jamming signal,thus the underdetermined problem can be converted to well-posed BSS to take advantage of it to re-alize the separation and suppression of deception jamming. The experiment results indicate that the mixed signals can be separated successfully when the delay difference is more than 5 ns,and this method can pro-vide reference for deception jamming resistance of the fuze,and it is also the theory extension of single-channel BSS.