一种LFMCW雷达目标距离范围的划分方法

摘要

In the Linear Frequency Modulated Continuous Wave (LFMCW) radar system, the leakage of the front-end of radar sensor which caused by the wave modulation had a strong impact on the measurement results of long-range goal. In tradition, the division of the distance of the radar target happened after the process of analyzing spectrum of the echo signal. To divide the range of a target before the spectrum analysis, a method based on similarity matching was put forward. According to the threshold which computed on the standardized target, the range of the target is judged. An experiment for an existing LFMCW radar system is designed to verify the feasibility of the method.%在采用对称三角波作为调制信号的线性调频连续波(Linear Frequency Modulated Continuous Wave,LFMCW)雷达系统中,雷达传感器前端产生的三角调制波泄漏信号严重影响远距离目标的测量结果.因此有必要对待测目标进行范围划分.传统的距离划分是在对回波信号进行频谱分析之后进行的.提出的基于相似度匹配法能够在未对信号进行频谱分析之前,根据与标定目标预先计算的阈值作比较,得出目标所在距离范围,并针对实际系统设计实验方案,验证该方法的可行性.