多环路交叉眼干扰的波前相位畸变研究

Study on Wave-front Phase Distortion of Multi-loop Cross-eye Jamming

多环路交叉眼干扰能够有效改善交叉眼干扰严苛的实施条件而成为角度欺骗的研究热点。该文提出中心畸变程度和有效畸变区两个指标对多环路交叉眼干扰系统的波前相位畸变特性进行研究。首先,推导建立多元干扰信号的合成场模型,并以中心畸变程度和有效畸变区为目标函数建立约束模型;其次,通过MOEA/D算法对各环路干扰信号幅度比、相位差、环路数等参数进行优化分析;最后,结合对雷达的跟踪角干扰效果进行仿真验证。结果表明,相比于单环路干扰系统,多环路交叉眼干扰系统能够有效提高中心畸变程度和增大有效畸变区,同时随着环路数增加,干扰系统对单脉冲雷达的干扰效果减小,使干扰系统更多地表现为雷达指示器的作用。

As strict implementation conditions of cross-eye jamming can be effectively improved,multi-loop cross-eye jamming has become a stirring research topic.In this paper,the characteristics of wave-front phase distortion in multi-loop cross-eye jamming system are investigated by using two indexes,the degree of center distortion(DCD)and the effective distortion region(EDR).Firstly,the synthetic field model of multi-element jamming signal is derived,and the constraint model is established by taking DCD and EDR as objective functions.Secondly,parameters such as amplitude ratio,phase difference and the number of loops are optimized by MOEA/D algorithm.Finally,the jamming effect of radar tracking angle is verified by simulation.The results show that compared with the single loop jamming system,multi-loop cross-eye jamming system can effectively improve DCD and EDR,while jamming performance decreases with the increase of the number of loops,and the jamming system is more likely to act as a radar indicator.