基于MTD的LFM雷达对抗DRFM干扰方法  

DRFM Jamming Suppression Method Based on MTD for LFM Radar

作　　者：奚舒靓 张仁李[1] 盛卫星[1] 李兴熔 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]中国航天科工集团十院十部,贵州贵阳550009

出　　处：《制导与引信》2017年第1期37-41,共5页Guidance & Fuze

摘　　要：针对数字射频存储器(Digital Radio Frequency Memory,DRFM)干扰作用下,线性调频脉压雷达无法稳定检测与跟踪目标的问题,提出了一种基于动目标检测的DRFM干扰对抗算法。该算法利用动目标检测处理分别将目标和干扰回波的能量进行相参积累这一特性,根据恒虚警检测后峰值分选出两种回波信号,通过逆动目标检测和逆脉冲压缩处理恢复时域信号,最后使用相位统计次数方差鉴别目标和干扰。仿真结果表明,在低信噪比条件下,该方法能够有效地对抗DRFM干扰。Linear Frequency Modulation （LFM） pulse radar suffers from detection and tracking performance degradation in the situation of Digital Radio Frequency Memory （DRFM） jamming. To solve this problem, based on Moving Target Detection （MTD）, an algorithm to suppress the DRFM jamming is proposed. The algorithm is divided into three steps. Firstly, MTD is utilized to coherently integrate the energy of target and DRFM jamming separately in two peaks which are detected by Constant False Alarm Rate （CFAR） processor. Secondly, the time-domain echoes at the two peaks are recovered separately by in- verse MTD processing and inverse pulse compression processing. Finally, the target and DRFM jamming are discriminated by using a statistic named Variance of Phase Statistical Times （VPST）. Simulation results＇are given to demonstrate the efficiency of the proposed method. It shows that under the condition of low signal-to-noise ratio, the proposed method can suppress the DRFM jamming.

关 键 词：数字射频存储器 动目标检测 线性调频 相位量化 

分 类 号：TN974[电子电信—信号与信息处理]