对机载预警雷达STAP的慢时调频干扰方法  

Slow-time-frequency-modulation jamming method for STAP airborne early-warning radar

作　　者：陈小舟 邢庆君 张立东 CHEN Xiaozhou;XING Qingjun;ZHANG Lidong(Unit 93209 of the PLA, Beijing 100085, China)

机构地区：[1]中国人民解放军93209部队,北京100085

出　　处：《系统工程与电子技术》2021年第11期3177-3184,共8页Systems Engineering and Electronics

摘　　要：机载雷达的空时自适应处理技术(space-time adaptive processing,STAP)可以通过采样形成二维凹陷,使干扰机难以产生密集的假脉冲。本文提出了一种有效增加假脉冲数量的干扰方法。通过理论分析推导出频率唯一性条件,证明了不同多普勒频率的干扰脉冲无法被STAP采样对消。干扰机可在快时和慢时分别调整干扰脉冲的距离和径向速度,增强干扰的可控性,既可在局部区域内精确掩护,也可以在全距离范围内实现大面积密集遮盖。仿真证明,通过为每个干扰脉冲依次调制不同多普勒相位,可显著提升干扰信号的数量密度,而且对降维STAP依然有良好的干扰作用。Space-time adaptive processing(STAP)on airborne radar can generate two-dimensional notches by means of sampling from received signals,preventing jammers from creating dense false pulses.An effective approach of increasing the number of false pulses is presented in this paper.Frequency uniqueness condition is theoretically deduced,which implies pulses with different Doppler frequencies cannot be sampled yet cancelled by STAP.This method improves controllability,thus we can set ranges and radial velocity of jamming pulses in fast-time and slow-time respectively,which facilitates covering precisely in a region or densely overspreading the whole detection range.Simulations validate that,by means of setting different Doppler phases to each jamming pulses will improve the number and density of jamming signals remarkably.This method also works well to reduced-dimension STAP.

关 键 词：空时自适应处理 干扰 电子战 慢时调频 

分 类 号：TN972[电子电信—信号与信息处理]