基于多维匹配场处理技术的扩展杂波抑制算法  

A New Spread Clutter Suppression Algorithm Based on Multiple dimension Matched Field Processing Technique

作　　者：卢琨[1] 刘兴钊[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《现代雷达》2004年第7期33-36,共4页Modern Radar

摘　　要：高频天波超视距雷达通过电离层的折射作用 ,具有同时超视距监测大区域范围的能力。但是由于高频HF段的电波传输环境复杂 ,存在相位路径失真和多模式传输等多种不利因素 ,会导致接收到的杂波展宽 ,从而淹没于杂波附近的目标回波。主要讨论了位于相邻探射区域反射的一致杂波的展宽现象 ,在针对该现象的原始匹配场处理方法的基础上 ,提出了多路信号形成多维交叉相关的方法。通过实验仿真说明 。High frequency skywave over-the-horizon radar can provide a wide coverage beyond the horizon by means of refraction within the ionosphere. However, due to the complex propagation conditions of electromagnetic wave in HF band, many disadvantageous factors, such as phase path contamination and multimode propagation, will cause the neighboring target submerged in the spread clutter. In this paper, the spread effect of uniform clutter backscattered from the adjacent dwell illumination region has been discussed. On the basis of the existing matched field processing method specifically developed for this problem, the multiple dimension cross correlation method using the multiple channel signals is proposed and used to the temporal data directly. Experimental simulations are given which demonstrate that the modified method is effective to suppress the spread clutter. [

关 键 词：高频天波超视距雷达 扩展杂波 匹配场处理 盲通道识别 

分 类 号：TN957.51[电子电信—信号与信息处理]