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A Radar Jamming Method Based on Time Domain Coding Metasurface Intrapulse and Interpulse Coding Optimization
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摘要: 时域编码超表面是一项可以对电磁波进行时变调制的新技术，针对该技术的调控特性，该文提出了一种基于时域编码超表面脉内-脉间编码优化的雷达干扰方法。首先分别在快时间域和慢时间域建立优化模型，通过优化脉内-脉间相位编码，实现目标能量的搬移，形成距离-多普勒二维图上的欺骗干扰。然后通过遗传算法对该离散优化模型进行求解。另外，该文从超表面编码策略的角度分析了多种调控因素对干扰效果的影响，为实现欺骗干扰的最佳策略提供指导。Abstract: Time Domain Coding Metasurface (TDCM) is an emerging technology enabling dynamic modulation of electromagnetic waves. In response to the control characteristics of this technology, this paper presents a radar jamming method based on TDCM intrapulse and interpulse coding optimization. First, optimization models are established in fast and slow time domains. By optimizing intrapulse and interpulse phase coding, the energy redistribution of targets is achieved, thereby generating deceptive interference on the range-Doppler two-dimensional plot. Subsequently, a genetic algorithm is employed to solve this discrete optimization problem. Furthermore, this paper analyzes the effect of various modulation factors on interference effectiveness in terms of TDCM coding strategies, providing guidance for achieving optimal strategies for deceptive interference.
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图 1 雷达与时域超表面交互示意图
Figure 1. Schematic diagram of radar interaction with time domain metasurface
图 2 超表面2比特相位编码调制示意图
Figure 2. Schematic diagram of metasurface 2 bit phase coding modulation
图 3 超表面调制的LFM回波时频图示意图
Figure 3. Time-frequency diagram of LFM echo with metasurface modulation
图 5 快时间域相位编码优化欺骗干扰
Figure 5. Phase coding optimization of deception jamming in fast time domain
图 6 慢时间域相位编码优化欺骗干扰
Figure 6. Phase coding optimization of deception jamming in slow time domain
图 7 未调制回波与联合编码调制回波距离-多普勒图
Figure 7. Range-Doppler diagram of unmodulated echo and jointly coding modulated echo
图 8 针对相位编码波形的快时间域相位编码优化欺骗干扰
Figure 8. Phase coding optimization of deception jamming in fast time domain for phase coded waveform
图 9 基于相位编码波形的未调制回波与联合编码调制回波距离-多普勒图
Figure 9. Range-Doppler diagram of unmodulated echo and jointly coding modulated echo based on phase coded waveform
图 10 基于二维全局优化编码调制回波距离-多普勒图
Figure 10. Range-Doppler diagram of coded modulation waveform based on two-dimensional global optimization
图 13 快时间域编码调制不同调制间隔、相位调控裕度对比分析
Figure 13. Comparative analysis of different modulation intervals and phase control margin in fast time domain coding modulation
图 14 快时间域编码调制不同干扰距离、相位调控裕度对比分析
Figure 14. Comparative analysis of different jamming position and phase control margin in fast time domain coding modulation
表 1 雷达波形参数设置
Table 1. The parameter setting of radar waveform
参数 数值 脉冲数N 64 脉冲脉宽${T_{\rm p}}$ 20 μs 脉冲带宽B 10 MHz 脉冲重复周期${T_{\mathrm{r}}}$ 100 μs 中心载频$ {f_0} $ 10 GHz 采样率${f_{\mathrm{s}}}$ 20 MHz 
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表 2 优化模型求解算法参数设置
Table 2. The parameter setting of the optimization model solution algorithm
参数 数值 种群大小${P_{\mathrm{s}}}$ 100 迭代次数${G_{\mathrm{s}}}$ 20000 交叉概率${C_{\mathrm{r}}}$ 0.6 变异概率${M_{\mathrm{r}}}$ 0.1
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