摘要
设计了一款基于ARM单片机的线性调频连续波(LFMCW)雷达测距系统,其采用三角波调制的LFMCW雷达实现目标距离测量。介绍了LFMCW雷达的基本结构和实现目标距离测量的原理,并重点研究了LFMCW雷达测距系统的信号处理算法——快速傅里叶变换(FFT)和线性调频Z变换(CZT)联合的测距算法(FFT/CZT联合算法)的实现。经理论计算和MATLAB仿真分析表明,FFT/CZT联合算法可以显著提高计算效率和精度。
A Linear Frequency Modulated Continuous Wave（LFMCW） radar ranging system based on ARM single-chip microcomputer is designed.A LFMCW radar with triangular modulation is adopted to measure target range.The basic structure of LFMCW radar and the principles of using LFMCW radar to measure target range are presented.The signal processing algorithm of LFMCW radar ranging system which combines FFT algorithm and CZT algorithm to process radar signal are emphatically introduced.The theoretical calculation and MATLAB simulation results prove that FFT/CZT algorithm could improve the calculation efficiency and accuracy greatly.
出处
《科学技术与工程》
2011年第33期8191-8194,共4页
Science Technology and Engineering
