基于子脉冲LFM的PFES距离模糊函数栅瓣抑制研究  

Eliminating Grating Lobe of Distance Ambiguity Function for PFES Based on Sub-pulse LFM

作　　者：李雅凤[1] 贺知明[1] 陈金梅[1] 宋江[1] 陈松林[1] 

机构地区：[1]电子科技大学,成都611731

出　　处：《电光与控制》2016年第3期19-23,44,共6页Electronics Optics & Control

基　　金：装备预研基金(9140A07030213DZ02097)

摘　　要：子脉冲频率编码信号(PFES)在子脉冲宽度大于最小跳频间隔倒数的情况下,其距离模糊函数在中心模糊带内主瓣周围会产生栅瓣。栅瓣不仅影响单目标自身的准确检测,并且强目标栅瓣会对落入其中的弱目标主瓣造成掩盖,使得弱目标漏检。在原有子脉冲频率编码信号的基础上引入了子脉冲线性调频,深入研究并给出了该复合信号的参数选取准则,从而达到消除子脉冲频率编码信号距离模糊函数栅瓣的目的,最后仿真验证了此效果。The distance ambiguity function of Pulse Frequency Encoding Signal（ PFES） has grating lobes around the main lobe, under the circumstance that the width of sub-pulses is larger than reciprocal of minimal frequency hopping gap. Grating lobes not only have bad effect on accurate detection of single target,but also hide the main lobe of weak target when it locates in grating lobes of others, leading to miss detection. In order to eliminate the grating lobes of distance ambiguity function of frequency-coded subpulses signal, sub-pulses Linear Frequency Modulation（ LFM） was introduced based on the original signal,then parameter choice rules of the composite signal were discussed to achieve that purpose. The effect of the method was verified by using Matlab simulation.

关 键 词：雷达 目标探测 子脉冲频率编码 模糊函数 线性调频 栅瓣抑制 

分 类 号：TN951[电子电信—信号与信息处理]