一种基于正交脉冲分集的ISAR欺骗干扰消除与识别方法  

A Method of ISAR Identifying and Eliminating Deceptive Jamming Based on Orthogonal Pulse Diversity

作　　者：彭正翔 张群[1] 刘治东 李开明[1] 蔡斌[1] PENG Zhengxiang;ZHANG Qun;LIU Zhidong;LI Kaiming;CAI Bin(Information and Navigation School,Air Force Engineering University,Xi’an 710077,China)

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《空军工程大学学报（自然科学版）》2022年第2期39-45,共7页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金(61631019,61871396);陕西省自然科学基础研究计划(2020JM-348)。

摘　　要：延时转发欺骗性干扰是针对逆合成孔径雷达(ISAR)成像的一种重要干扰方法,为了对抗干扰产生的假目标,提出一种基于正交脉冲分集的ISAR欺骗干扰识别与消除方法。首先建立了逆合成孔径雷达干扰信号模型,研究并给出了针对此干扰的正交脉冲设计应当满足的约束条件,通过设计一组半正交化的脉冲实现了对于延迟转发欺骗干扰的消除与识别。该方法通过对逆合成孔径雷达波形的正交化设计,可以检测并消除延时转发干扰产生的假目标,实现相应的逆合成孔径雷达抗干扰。最后通过仿真实验在20dB的干信比条件下,产生了0.3倍峰值的旁瓣波形,并成功得到ISAR图像。同时在5dB以上的高信噪比条件下,将文中方法与已有方法进行对比,ISAR图像的峰值信噪比提升了约5dB,验证了所提方法的有效性。Delay forwarding deceptive jamming is an important jamming method in the light of the inverse synthetic aperture radar(ISAR)imaging.In order to counter the false target caused by jamming,an ISAR deceptive jamming recognition and elimination method is proposed based on orthogonal pulse diversity.Firstly,ajamming signal model of ISAR is established,and the constraint conditions of orthogonal pulse design for this jamming are studied and given.A group of semi orthogonal pulses are designed to eliminate and identify the delay forwarding deception jamming.This method can detect and eliminate the false target caused by delay forwarding jamming by orthogonal design of inverse synthetic aperture radar waveform,and achieve the corresponding anti-jamming of inverse synthetic aperture radar.Finally,through the simulation experiment,the sidelobe waveform with 0.3times the peak value is generated under the condition of20dB interference signal ratio,and the ISAR image is successfully obtained.At the same time,the existing methods being compared with high signal-to-noise ratio of more than 5dB,the peak signal-to-noise ratio of ISAR image is improved by about 5dB,and the method is valid.

关 键 词：逆合成孔径雷达 抗欺骗干扰 正交波形设计 脉冲分集 

分 类 号：TN957[电子电信—信号与信息处理]