基于调频连续波雷达的动态背景建立方法

Method of Building Dynamic Background Based on FMCW Radar

通过开机学习来建立固定背景的雷达系统适用于相对稳定且简单的检测环境,若在复杂环境下仍然使用固定背景作为参考,背景的起伏、多径反射、环境能量叠加等因素会使检测时刻的背景信息与初建立时的背景出现较大不同,造成虚报、漏报、误报;介绍了一种建立动态参考背景的方法,确保动目标检测时的参考背景具有较强的时效性,同时使用方差反映背景变化趋势;通过使用此方法,可以有效地提高雷达检测正确性,并且经过工程实践检验,该方法对系统改善效果明显。

From the study when hardware powered on, the Radar system can get the stable background in- formation. But this method can only be used in some simple detecting environment. When the environment is complicated, the changing of background, the multipath reflection, the energy superposition could make the background information be different from the former. This paper introduces a method of building the dynamic background in Radar system, it can make sure that the comparing and detecting algorithms work in real time. And the variance can be used to give out the tendency of changing background. This method can raise the validity of the detecting result and mnk-,= th,= l^oA k