基于FPGA的多普勒雷达测速系统  

Doppler radar velocity measurement system based on FPGA

作　　者：张建宏 武锦辉[1] 刘吉[1] 苏凝钢 Zhang Jianhong;Wu Jinhui;Liu Ji;Su Ninggang(School of Information and Communications Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院

出　　处：《国外电子测量技术》2019年第12期72-75,共4页Foreign Electronic Measurement Technology

基　　金：装备预研重点实验室基金（61420010403）;国家自然科学基金（61603352）;装备预研领域基金（6140003050110）项目资助

摘　　要：提出了以多普勒雷达测量弹丸速度的多普勒信号为研究对象,分析了弹丸速度的多普勒信号频率特征,实现了对弹丸速度进行实时性,高精度的测量。并设计了一种基于FPGA的多普勒雷达测速系统。系统以FPGA Cyclone Ⅳ系列为核心处理器,采用高精度ADS828快速采集雷达的多普勒信号,并将数据通过快速傅里叶变换(FFT)进行频谱分析,估算出高速运动弹丸的瞬时频率,求得弹丸速度。测试结果与校准后的激光靶进行比对,测量误差优于0.2%。结果表明,该系统性能稳定,具有准确,快速等优点,验证了系统的可行性。In this paper,the Doppler signal measured by Doppler radar is taken as the research object.The Doppler signal frequency characteristics of the projectile velocity are analyzed,and the real-time and high-precision measurement of the projectile velocity is realized.And an FPGA-based Doppler radar speed measurement system is designed.The system uses the FPGA Cyclone Ⅳ series as the core processor,uses the high-precision ADS828 to quickly acquire the Doppler signal of the radar,and analyzes the data by fast Fourier transform(FFT)to estimate the instantaneous frequency of the high-speed motion projectile,find the projectile speed.The test results are compared with the calibrated laser target,and the measurement error is better than 0.2%.The results show that the system has stable performance,accurate and fast,and the feasibility of the system is verified.

关 键 词：FPGA 多普勒信号 快速傅里叶变换 频谱分析 

分 类 号：TN06[电子电信—物理电子学]