相位调制表面周期非均匀间歇调制方法

doi:10.12382/bgxb.2021.0789

摘要/Abstract

摘要：

相位调制表面(PSS)作为一种电磁散射特性动态可调的人工电磁材料,可以通过控制电磁波的反射状态改变雷达目标特性,实现雷达目标模拟或假目标生成。针对相位调制表面周期间歇调制方法控制参数有限、调制效果单一的问题,提出相位调制表面周期非均匀间歇调制方法。在周期性间歇调制信号基础上构建周期性非均匀间歇调制信号模型,根据调制信号特点引入调制系数,对相位调制表面控制参数维度进行扩展。通过理论推导,分析PSS周期非均匀调制方法对雷达线性调频信号的影响。仿真实验结果表明,相比于PSS周期间歇调制方法,该方法具有更为灵活的调制样式和更为多样的调制结果,在雷达目标模拟、雷达目标特性调控等方面具有较高的应用价值。

关键词: 雷达目标, 相位调制表面, 间歇调制

Abstract:

Phase-switched screen (PSS), as a kind of artificial electromagnetic material with dynamically adjustable electromagnetic scattering characteristics, can change radar target characteristics by controlling the reflection state of electromagnetic waves to realize radar target simulation or false target generation. To address the problem of limited control parameters and single modulation effect of the phase-switched screen periodic intermittent modulation method, a phase-switched screen periodic non-uniform intermittent modulation method is proposed. The periodic non-uniform intermittent modulation signal model is constructed on the basis of the periodic intermittent modulation signal, the modulation coefficient is introduced according to the characteristics of the modulation signal, and the dimension of the phase-switched screen control parameter is expanded. Through theoretical derivation, the influence of the PSS periodic non-uniform modulation method on the radar chirp signal is analyzed. The simulation experiment results show that compared with the PSS periodic intermittent modulation method, this method has more flexible modulation styles and more diverse modulation results, thus having higher application value in radar target simulation and radar target characteristic control.

Key words: radar target, phase-switched screen, interval modulation

孔亚盟, 王国玉, 冯德军, 王俊杰. 相位调制表面周期非均匀间歇调制方法[J]. 兵工学报, 2023, 44(4): 1209-1216.

KONG Yameng, WANG Guoyu, FENG Dejun, WANG Junjie. Phase-switched Screen Periodic Non-uniform Intermittent Modulation Method[J]. Acta Armamentarii, 2023, 44(4): 1209-1216.

图/表 9

图1 相位调制表面基本结构

Fig.1 Basic structure of phase-switched screen

图2 相位调制表面工作原理

Fig.2 Operating principle of phase-switched screen

图3 周期非均匀间歇调制模型

Fig.3 Periodic non-uniform intermittent modulation model

图4 周期间歇调制结果

Fig.4 Periodic intermittent modulation result

图5 周期非均匀间歇调制系数d对匹配滤波结果的影响

Fig.5 Effect of periodic non-uniform intermittent modulation factor d on matched filtering results

图6 离散峰幅度变化

Fig.6 Variation curve of discrete peak amplitude

图7 1、2、3阶离散峰幅度均值变化

Fig.7 Variation curve of the mean value of the discrete peak amplitude of 1, 2, and 3 orders

图8 1、2、3阶离散峰幅度方差变化

Fig.8 Variance curve of discrete peak amplitude of 1, 2, and 3 orders

图9 周期非均匀间歇调制频率fs匹配滤波结果的影响

Fig.9 Effect of periodic non-uniform intermittent modulation frequency fs on matched filtering results

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