摘要
线性调频连续波(LFMCW)雷达应用于汽车防撞的首要任务是距离和速度的测量;根据测距测速原理,制定了信号处理流程;构建了基于32位DSP的双FIFO数据采集和数字信号处理硬件平台;通过分析高速公路汽车间安全距离和速度关系,提出测量指标;根据测量指标要求,制定了信号处理技术指标;针对防撞雷达系统多个参数相互制约的问题,以10GHz的工作频率为基础,给出系统工作参数制定的方法和步骤;根据测量指标与频域分辨力关系,分析了1024点FFT时频性能,完成信号处理主要算法。
Distance and velocity measurements are primary mission of LFMCW radar in automobile anti-collision application.The signal processing procedure is established according to the principle of distance and velocity measurement Data acquisition with two FIFOs and signal processing hardware are constructed based on 32 bit DSP.The measurement targets are provided through analyzing the relationship between safe distance and velocity in highway.According to measurement target the signal processing technique targets are established.The system working parameters are restricted each other,to resolve this problem the working parameters formulating method and steps of radar system are provided based on 10GHz carrier frequency.According to the relation between measurement targets and frequency resolution the time-frequency performance of 1024 FFT is analyzed and main algorithms are accomplished.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第7期1656-1658,共3页
Computer Measurement &Control
基金
河南省重点科技攻关项目资助(092102210146)
