摘要
线性调频信号(LFM)是应用极为广泛的一种信号体制,这种信号最大的特点就是可以使雷达同时获得远的作用距离和高的距离分辨率。通常,雷达在搜索检测阶段可积累的脉冲数受雷达天线的扫描速度和波束宽度的限制,当目标处于强噪声背景或者目标本身的反射特性较弱时,在有限的积累脉冲数内往往达不到检测所需的信噪比。本文主要通过数字自相关技术及自相关运算来实现去除噪声,从而检测线性调频信号并给出相应实验结果。
LFM signals is the application of a wide range of a signal system, and the signal characteristics is the largest radar at the same time can be long range and high range resolution. Typically, radar detection stage in the search can be accumulated by the pulse of the radar antenna beam width and scanning speed restrictions. When the target is strong and background noise or the reflective properties of target itself is weak, in the limited number of pulse it usually can not achieve the demand ratio of successful detecting SNR （signal to noise ratio）. This paper shows a method to meliorate the SNR which uses digital auto-correlation and auto-correlation technique, and gives the experimental result by testing linear FM signal.
出处
《国外电子测量技术》
2008年第3期43-45,共3页
Foreign Electronic Measurement Technology
