针对线性调频雷达系统的信源数估计算法  

Source Number Estimation Method for LFM Radar System

作　　者：王浩丞 WANG Hao-cheng(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,四川成都610036

出　　处：《舰船电子对抗》2022年第6期54-57,共4页Shipboard Electronic Countermeasure

摘　　要：针对线性调频体制雷达系统,提出了一种基于匹配滤波的快速估计雷达及诱饵数量的方法。首先从雷达和诱饵信号前沿、信号后沿的脉内信息中获取线性调频信号的调频斜率,然后构造匹配函数,采用匹配函数对混合信号进行匹配滤波,最后对滤波后的信号进行搜峰处理,得到雷达与诱饵的数量和。相比于谱估计信源数估计,本方法不受导引头频段、口径的限制,不受弹目距影响,也不受接收处理通道数限制。在小口径、远距离条件下,也能识别低频段雷达诱饵的数量。For the linear frequency modulation(LFM)radar system,a fast estimation method for the number of radar and decoy based on matched filtering is proposed.Firstly,the frequency modulation slope of LFM signal is achieved by using intra-pulse modulation information of front and back edge of radar and decoy signals.Then,the matching function is constructed,and the mixed signal is filtered by using matched function.Finally,the signal spectrum peak search of filtered signal is adopted to get the sum of the radar and the decoy.Compared with the source number estimation by spectrum estimation,this method is not limited with seeker frequency band,antenna aperture,distance between missile and target and the number of receiving and processing channel.The number of low band radar and decoy can be identified in the condition of small aperture,long distance.

关 键 词：线性调频雷达系统 雷达诱饵数量 匹配滤波 

分 类 号：TN971.1[电子电信—信号与信息处理]