摘要
雷达被广泛地应用于汽车防撞领域.该文设计了一种基于Zynq平台的汽车雷达防撞数据采集系统,将雷达中频模拟信号进行信号调理,AD(Analog to Digital Converter)采样控制模块控制采样,经AD转换后的数据送入Zynq的PL(Programmable Logic)部分进行处理,缓存到DDR(Double Data Rate),并利用AXI(Advanced Extensible Interface)总线实现DDR数据接口及PL,PS(Processing System)通讯接口设计,并且对PS部分进行FFT运算.实验结果表明该系统工作稳定,转换速率快,有效提高了汽车防撞测距测速功能.
R adar is widely used in the field of autom otive anti-collision. A kind of autom otive anti-collisionradar data acquisition system based on Zynq platform has been designed. F irst of all, radar interm ediatefrequencyanalog signal has been adjusted, and then to AD convert that is controlled by the AD sam plingcontrol m odule. T he Data from ADC will be converted into zynq PL parts for further processing, thencache to the D D R, PS part read the cached data in the DDR at the sam e tim e. T he front-end of system consistsof the signal conditioning circuit, differential output circuit and ADC conversion circuit that w ith highsam pling rate, and the back-end adopted zynq platform that integrated FPG A and A RM . A nd DDR datainterface and P L , PS com m unication interface w as designed by using the AXI bus and the PS part do theF F Tarithm etic. R esults show that the system w orking is stable and w ith fast conversion rate.
出处
《西南师范大学学报（自然科学版）》
CAS
北大核心
2016年第7期126-132,共7页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(51175154
51275157)
湖北省科技厅项目(2010CDB03104)
