数字波束成形在车载毫米波雷达中的应用

Application of Digital Beamforming in Vehicle Millimeter Wave Radar

汽车智能驾驶辅助系统(ADAS)和无人驾驶汽车是目前汽车领域非常热门的方向,而车载毫米波雷达又是该领域中非常重要的传感器,为车辆决策和执行系统提供目标信息(距离、速度和方位角)。随着技术的发展,现有的SIMO毫米波雷达的分辨能力难以满足自适应巡航(ACC)和紧急制动(AEB)的要求。提出了基于数字波束成形技术的车载MIMO毫米波雷达,采用两发八收天线,在发射天线利用频分复用(FDM)调制,从而达到接收天线不模糊接收回波信号。通过测试和仿真,满足水平方向1度、俯仰方向2度分辨率的3D雷达,进一步提高雷达在ADAS与无人驾驶领域的探测性能。

The advanced driving assistance system （ADAS） and automatic vehicle are very popular in the current automotive field, and the millimeter -wave radar is a very important sensor in the field, providing target information （ range, speed, angle） for vehicle decision and execution systems. With the development of technology, the resolution of existing SIMO millimeter - wave radar is difficult to meet the requirements of adaptive cruise control （ACC） and autonomous emergency braking （AEB）. Aiming at this problem, a vehicle MIMO millimeter - wave radar based on digital beamforming technology is proposed, using two transmit antennas （ TX）, eight receive antennas （RX） and frequency division multiplexing （FDM）. Through testing and simulation, horizontal direction angle accuracy is 1 degree, and vertical direction angle accuracy is 2 degree, in order to further improve the radar detection performance in the field of ADAS and automatic driving.