| 摘要: |
| 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。 |
| 关键词: LFM雷达引信 欺骗干扰抑制 盲分离 单通道 时频解耦 |
| DOI： |
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| 基金项目: |
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| Single-channel LFM fuze deception jamming suppression based on BSS |
| YIN Hong-wei,LI Guo-lin,LU Cui-hua |
| () |
| Abstract: |
| 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 realize 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 provide reference for deception jamming resistance of the fuze,and it is also the theory extension of single-channel BSS. |
| Key words: LFM radar fuze deception jamming suppression blind source separation single-channel time-frequency decoupling |
《电讯技术》编辑部 