小时宽带宽积下菲涅耳纹波抑制方法  

Research on Suppression of Fresnel Ripples in Small Time-band Width

作　　者：肖军 张学波[2] 

机构地区：[1]解放军91388部队 [2]海军工程大学

出　　处：《火力与指挥控制》2014年第4期42-44,共3页Fire Control & Command Control

基　　金：水声对抗国防科技重点实验室基金资助项目(2011ssdkzd03.02)

摘　　要：针对小时宽带宽积线性调频信号时,海明内加权匹配滤波器难以有效抑制旁瓣的问题,研究了余弦幅度锐化和3次相位预失真两种减小菲涅尔纹波影响的方法,并对两种方法与传统海明内加权方法的脉压结果进行了比较,最后分析了两种方法的TB积适用性和多普勒敏感性。仿真结果表明,两种方法都能有效减小小时宽带宽积下菲涅尔纹波的影响。The sidelobe can’t be suppressed efficiently by internal Hamming weighted compression filters in low Time-Bandwidth Product （TBP）linear FM signal case. In order to reduce, this paper discusses two methods,i.e. amplitude tapering of the rectangular FM signal and cubic phase predistortion of the rectangular transmitted pulse,compares the compression results between the presented methods and the conventional internal Hamming weighted method,and analyzes the performance of both two methods. The simulation indicates that both two methods can reduce the effect of Fresnel ripples on sidelobe suppression in low TBP case.

关 键 词：菲涅尔纹波 旁瓣抑制 幅度锐化 3次相位预失真 

分 类 号：TP56[自动化与计算机技术]