步进频合成孔径雷达二维间歇采样干扰方法  

Two-dimensional Interrupted-Sampling Jamming Method against Step Frequency Synthetic Aperture Radar

作　　者：杨福荣[1] 亢程龙 梁康贵 唐佳[1] 于海洋 YANG Furong;KANG Chenglong;LIANG Kanggui;TANG Jia;Yu Haiyang(Southwest China Research Institute of Electronic Equipment,Chengdu 610031,China)

机构地区：[1]西南电子设备研究所,四川成都610031

出　　处：《现代信息科技》2022年第14期46-50,共5页Modern Information Technology

摘　　要：步进频合成孔径雷达(SFSAR)通过发射载频步进变化的子脉冲串合成大带宽,获得高距离分辨率,方位通过虚拟合成孔径实现高分辨。其兼具相干积累、脉冲压缩和脉间频率捷变等抗干扰能力,传统储频和噪声干扰样式效果差或能量利用率低。针对该问题,首先分析了SF-SAR波形特点、信号处理流程和对抗难点,并提出了基于二维间歇采样转发的干扰方法,理论上分析了干扰信号的雷达处理响应。最后通过仿真验证了方法的有效性,分析了不同干扰样式参数对干扰效果的影响。Step frequency synthetic aperture radar (SFSAR) synthesizes large bandwidth by transmitting sub pulse trains with step-by-step change of carrier frequency to obtain high range resolution,and high resolution is achieved by virtual synthetic aperture.It has the anti-interference ability of coherent accumulation,pulse compression and inter pulse frequency agility,and the traditional frequency storage and noise interference patterns have poor effect or low energy utilization.Aiming at this problem,firstly,the characteristics of SF-SAR waveform,signal processing flow and countermeasure difficulties are analyzed,and the jamming method based on two-dimensional interrupted-sampling and forwarding is proposed.The radar processing response of jamming signal is analyzed theoretically.Finally,the effectiveness of the method is verified by simulation,and the influence of different jamming pattern parameters on the jamming effect is analyzed.

关 键 词：脉间频率步进波形 合成孔径雷达 二维间歇采样干扰 SAR干扰 

分 类 号：TN974[电子电信—信号与信息处理]