基于NSGA-Ⅱ的波前相位畸变特性分析  

Analysis on wave-front phase distortion characteristics based on NSGA-Ⅱ

作　　者：陈嘉贝 王青平[1] 叶源 吴微微[1] 袁乃昌[1] CHEN Jiabei;WANG Qingping;YE Yuan;WU Weiwei;YUAN Naichang(The State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410000, China)

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410000

出　　处：《系统工程与电子技术》2022年第5期1439-1446,共8页Systems Engineering and Electronics

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。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.

关 键 词：电子战 欺骗干扰 NSGA-Ⅱ算法 波前相位 交叉眼干扰 

分 类 号：TN97[电子电信—信号与信息处理]