【作者】 杜昊泽； 王知非； 马无忌； 李辰； 陈继新； 徐刚；

【Author】 DU Haoze;WANG Zhifei;MA Wuji;LI Chen;CHEN Jixin;XU Gang;State Key Laboratory of Millimeter Waves, Southeast University;

【机构】 东南大学毫米波国家重点实验室；

【摘要】 毫米波雷达具有很高的测量精度,能够实现微小信号检测。本文提出了一种基于调频连续波(FMCW)毫米波雷达的生命体征信号监测方法。首先介绍了雷达检测生命体征信号的基本原理,并建立了相应的信号模型。然后对雷达回波数据进行处理,提出目标距离单元的锁定方法,通过扩展的差分-交叉相乘算法、一阶差分和滤波处理得到目标的相位信息,进而利用带通滤波提取并分离呼吸、心跳信号,并通过短时傅里叶变换(STFT)方法计算出目标的呼吸率和心率。最后进行了多组实验,验证了算法的准确性、实时性和可靠性。更多还原

【Abstract】 Millimeter wave radar has high measurement accuracy and can detect tiny signals. In this paper, a vital signs monitoring method using frequency modulated continuous wave(FMCW) millimeter-wave radar is proposed.Firstly, the principle of radar detection of vital signs is introduced, and the corresponding signal model is established.Then, the radar echo data is processed, and the locking method of the target distance unit is proposed. The phase information of target is obtained through the extended difference-cross multiplication algorithm, first-order difference and filtering processing. And the respiration and heartbeat signal are extracted by band-pass filtering.The target’s respiration and heart rate are calculated by the short-time Fourier transform(STFT) method. Finally,several experiments are conducted to verify the accuracy, real-time performance and reliability of the algorithm.更多还原