一种TDM-MIMO FMCW车载毫米波雷达目标检测方法  

Target Detection Scheme for TDM-MIMO FMCW Automotive Millimeter Wave Radar

作　　者：陈思翔 张云华 杨杰芳[1,2] Chen Sixiang;Zhang Yunhua;Yang Jiefang(National Space Sciences Center,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Microwave Remote Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 200049,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院微波遥感技术重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《遥感技术与应用》2021年第4期803-809,共7页Remote Sensing Technology and Application

基　　金：中国家自然科学基金面上项目(61971402和41871274)。

摘　　要：毫米波雷达作为汽车自动驾驶重要传感器之一,其主要功能是对车辆周围目标进行距离、速度和角度的测量。根据车载毫米波雷达一般使用场景,设计了一种以快速chirp信号作为发射波形的2发4收TDM-MIMO FMCW毫米波雷达目标检测方案以及相应的3D-FFT目标检测算法,可同时得到目标距离、速度和角度。通过优化天线阵元排布,该方案可有效解决常规TDM-MIMO由于通道时分复用导致对目标测速时的不模糊速度区间减小的问题。相比于常规发射三角波的车载雷达,该方案可以有效避免多目标速度匹配问题;相比于单脉冲测角,该方案可以极大地改善角度分辨率。最后,通过Matlab仿真验证了该方案和算法的有效性。Millimeter wave radar is one of the important sensors for auto driving.Its main function is to measure the distance,speed and angle of targets around the vehicle.According to the general application scenario of vehi⁃cle-mounted(automotive)millimeter-wave radar,a two-transmitter,four-receiver TDM-MIMO FMCW millimeter-wave radar scheme with a fast chirp signal as the transmission waveform and a corresponding 3DFFT target detection algorithm are designed,which can simultaneously obtain the target distance,speed and an⁃gle.By optimizing the arrangement of antenna elements,our solution can effectively solve the problem of unam⁃biguous speed interval reduction of conventional TDM-MIMO radar due to channel time division multiplexing when measuring the target speed.Compared with conventional triangle waveform radar,the scheme can effec⁃tively avoid the problem of multiple target speed matching.Compared with single pulse angle measurement scheme,the scheme can greatly improve the angular resolution.Finally,we validate the proposed scheme by Matlab simulation.

关 键 词：车载毫米波雷达 TDM⁃MIMO FMCW 目标检测 速度模糊 

分 类 号：TN957.52[电子电信—信号与信息处理]