CAJ | 학술논문

越来越多的汽车设计了24 GHz 或77 GHz 的前视雷达系统。本文提出了一个 K 波段的LFMCW雷达的硬件结构，用于对目标车辆距离和速度的测量。文中首先回顾了关于汽车雷达研究的意义和现状，用数学模型分析了LFMCW雷达的原理，推导了距离和速度测量的表达式；其中发射机采用了调谐VCO的方式，设计了一个一发两收的微带阵列天线，也对采用了FPGA和DSP进行数据采集和处理算法部分作了介绍；最后计算结果表明了雷达测量的可行性，并讨论了如何提高性能。
월래월다적기차설계료24 GHz 혹77 GHz 적전시뢰체계통。본문제출료일개 K 파단적LFMCW뢰체적경건결구，용우대목표차량거리화속도적측량。문중수선회고료관우기차뢰체연구적의의화현상，용수학모형분석료LFMCW뢰체적원리，추도료거리화속도측량적표체식；기중발사궤채용료조해VCO적방식，설계료일개일발량수적미대진렬천선，야대채용료FPGA화DSP진행수거채집화처리산법부분작료개소；최후계산결과표명료뢰체측량적가행성，병토론료여하제고성능。
More and more automobiles are designed with forward-looking radar system at 24GHz or 77GHz. The hardware architecture of a LFMCW radar at K band is presented for measuring distance and velocity of target vehi-cles. The significance and status of studying on automobile radar are firstly reviewed; and then, the principle of LFMCW radar is analyzed on basis of mathematical model and the expression on distance and velocity is deduced;the transmitter of the radar utilizes tuning VCO, and a one-transmitting-two-receiving microstrip array antenna is designed;The data acquisition circuit and processing algorithms based on FPGA and DSP are also introduced. In the end, the calculation results prove the feasibility of radar measurements and how to improve the performance is discussed.