基于FMCW毫米波雷达的人体生命体征检测实验设计  

Experimental Design of Vital Sign Detection Based on FMCW Millimeter Wave Radar

作　　者：杨天虹 屈乐乐 YANG Tianhong;QU Lele(College of Electronic Information Engineering,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学电子信息工程学院,沈阳110136

出　　处：《实验室研究与探索》2024年第6期60-65,共6页Research and Exploration In Laboratory

基　　金：辽宁省研究生教育教学改革项目(LNYJG2022089)。

摘　　要：利用线性调频连续(FMCW)毫米波雷达设计人体生命体征检测教学实验。基于FMCW毫米波雷达采集多个人体目标回波数据;采用快时间维快速傅里叶变换和Capon算法生成距离角度图;利用线性约束最小方差准则进行数字波束形成,提取各个目标所对应的慢时间维信号,使用改进的微分交叉相乘算法完成相位信号的提取;结合差分增强处理和带通滤波器实现对呼吸和心跳频率的估计,完成对多目标生命体征检测。有助于学生对雷达系统工作基本原理和信号处理方法的理解,提高雷达原理课程的教学效果。A teaching experiment for human vital sign detection is designed by using the frequency modulated continuous wave(FMCW)millimeter wave radar.Firstly,the echo data of multiple human targets are collected by using the millimeter wave FMCW radar.Subsequently,the fast time Fourier transform(FFT)and Capon algorithm are employed to generate the range angle map.Then,the linearly constrained minimum variance(LCMV)criterion is utilized for digital beamforming to extract the slow time signal corresponding to each human target,and the modified differentiate and cross-multiply(MDACM)algorithm is used for phase signal extraction.Finally,the differential enhancement(DE)processing and bandpass filtering are combined to estimate the respiration and heartbeat signal frequencies.This paper provides the detailed description of the experimental principle and process for human vital sign detection,which is helpful for students to understand the basic working principle and signal processing method of radar system.The designed teaching experiment can improve the teaching effect of radar principle course.

关 键 词：毫米波雷达 调频连续波 生命体征检测 实验设计 

分 类 号：G642.0[文化科学—高等教育学] TN951[文化科学—教育学]