基于NSGA-Ⅱ的波前相位畸变特性分析

doi:10.12305/j.issn.1001-506X.2022.05.02

摘要/Abstract

摘要：

多元矢量合成的干扰方法因其能造成波前相位的失真, 被公认为是对抗追踪体制雷达最好的手段之一。但大多数研究都从雷达方分析多元矢量的干扰性能, 需要事先了解雷达的测角体制, 而本文从干扰方的角度考虑, 建立多元矢量合成的干扰场景, 推导合成信号的幅度与相位表达式, 分析多元矢量合成的波形特征, 就中心畸变程度和有效畸变区这两个波形特征, 通过NSGA-Ⅱ算法对各阵元干扰信号幅度增益、相移量、阵元个数等参数进行优化分析。仿真实验表明, 不同阵元数量下波前相位有所不同, 而通过增加适当数量的阵元, 可以有效提高合成波中心畸变的程度, 改善合成波中心点的干扰性能, 但对于有效畸变区影响较小。

关键词: 电子战, 欺骗干扰, NSGA-Ⅱ算法, 波前相位, 交叉眼干扰

Abstract:

The jamming method of multi-vector synthesis is recognized as one of the best means to combat tracking radar because it can cause wave-front phase distortion. However, most of the researches analyze the jamming performance of multi-vector from the radar side, so we need to know the radar angle measurement system in advance. From the point of view of the jammer, this paper establishes the jamming scene of multi-vector synthesis, deduces the expression of amplitude and phase of the synthesized signal, and analyses the waveform characteristics of multi-vector synthesis. The parameters such as amplitude gain, phase shift and number of elements are optimized by the NSGA-Ⅱ algorithm for the purpose of improving the two waveform characteristics of the degree of center distortion and the effective distortion region. The simulation results show that the wave-front phases are not the same for different numbers of elements. By increasing an appropriate number of elements, the degree of center distortion of synthetic waves can be effectively improved, and the jamming performance of the center point of the synthetic wave could be better, but the influence on the effective distortion region is small.

Key words: electronic warfare, deceptive jamming, NSGA-Ⅱ algorithm, wave-front phase, cross-eye jamming

中图分类号:

TN97

陈嘉贝, 王青平, 叶源, 吴微微, 袁乃昌. 基于NSGA-Ⅱ的波前相位畸变特性分析[J]. 系统工程与电子技术, 2022, 44(5): 1439-1446.

Jiabei CHEN, Qingping WANG, Yuan YE, Weiwei WU, Naichang YUAN. Analysis on wave-front phase distortion characteristics based on NSGA-Ⅱ[J]. Systems Engineering and Electronics, 2022, 44(5): 1439-1446.

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参数名称	参数值
雷达频率/GHz	9
波束宽度/(°)	10
阵元孔径	2.54λ
阵元间距/m	10
阵元个数	2、3、4、5、6
干扰距离/m	1 000

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