复杂探测背景下的LFMCW雷达动目标二维检测方法

摘要

为了提高线性调频连续波雷达在复杂探测背景下的动目标检测能力,分析了线性调频连续波雷达回波信号的一维和二维频谱特点,提出了一种基于二维信号变换的动目标检测处理方法.该方法对雷达回波信号进行距离-速度二维变换,将变换结果作为二维恒虚警检测器的输入参考单元来检测淹没在一维距离谱中的运动目标,降低了复杂探测背景对动目标检测的影响,并在目标检测后利用二维变换信息提取了目标距离、速度和方位角度,测量了目标运动轨迹.%In order to improve the detection performance of LFMCW radar under complex background, the echo signal characteristics in the one- and two-dimensional frequency domain are analyzed and a new moving target detection method is presented. This method transforms the signal into the two-dimensional frequency domain and detects the moving target by using the 2-dimensional CFAR algorithm, which eliminates the interferences from complex background. After detection, by utilizing the information in the 2-dimensional frequency domain, the target range, velocity and azimuth angle are acquired and trajectory is measured. Simulation and experimental results demonstrate the effectiveness of this method.