| 摘要: |
| 针对单脉冲雷达抗干扰能力强的特点，可以采用多环路反向交叉眼进行干扰。该文对多环路反向交叉眼干扰进行建模，分析了平台运动在不同干扰环路间引入的多普勒频率差。运用泰勒级数展开推导了多普勒频率差的表达式，给出了补偿公式，并分析了多普勒频率差补偿的敏感度和多普勒频率差对参数容限的影响。仿真结果表明，多普勒频率差在干扰机转角为45°时最大，干扰机天线应尽可能对准单脉冲雷达以减小多普勒频率差；对不同环路之间的多普勒频率差补偿得越精确，干扰环路相位差越小，参数容限越宽松，多环路反向交叉眼的干扰效果就越稳定。 |
| 关键词: 单脉冲雷达 交叉眼干扰 多普勒频率差 参数容限 干扰效果 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.06.004 |
| 分类号:TN97；TN958.4 |
| 基金项目: |
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| Research on Doppler Frequency Difference of Multi-Loop Reverse Cross-Eye Interference |
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XIAO Yang，LUO Ming
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Key Lab of Electronic Information Countermeasure and Simulation Technology, Ministry of Education, Xidian University, Xi’an 710071, China
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| Abstract: |
| In view of the strong anti-interference ability of monopulse radar, the multi-loop reverse cross-eye can be used to interfere with monopulse radar. The multi-loop reverse cross-eye interference is modeled. The Doppler frequency difference caused by platform motion between different interference loops is analyzed. The Taylor series expansion is used to derive the expression of the Doppler frequency difference. The compensation formula is given, and the sensitivity of Doppler frequency difference compensation is analyzed. The simulation results show that the largest Doppler frequency difference appears when the jammer’s rotation angle is 45°, and the jammer antenna should be aligned with the monopulse radar as much as possible to reduce the Doppler frequency difference. The more accurate the compensation of the Doppler frequency difference between different loops is, the smaller the phase difference of the interference loop is. The looser the parameter tolerance is, the more stable the interference effect of the multi-loop reverse cross-eye is. |
| Key words: monopulse radar cross-eye interference Doppler frequency difference parameter tolerance interference effect |
