Journal of Xidian University ›› 2021, Vol. 48 ›› Issue (2): 173-180.doi: 10.19665/j.issn1001-2400.2021.02.022

• Special Issue: Advances in Radar Technology • Previous Articles     Next Articles

Heart rate monitoring method via weighted reconstruction of the 2 nd harmonic signal using the 77GHz FMCW radar

ZHENG Chundi1(),LI Gang2(),CHEN Huihui1(),WANG Aiguo1()   

  1. 1. School of Electronic Information Engineering,Foshan University,Foshan 528225,China
    2. Department of Electronic Engineering,Tsinghua University,Beijing 100084,China
  • Received:2020-09-27 Revised:2020-12-22 Online:2021-04-20 Published:2021-04-28
  • Contact: Gang LI;;;


Under the strong interference of respiration and its harmonics,a weighted reconstruction method of the second harmonic signal of the heartbeat is proposed to significantly improve the measurement accuracy of the heart rate by using the 77GHz FMCW radar.Based on the results of multi-resolution analysis of the chest wall displacement signal,the energy distribution characteristics of each layer is used to weight the sub-band within the second harmonic range of the heartbeat,which can highlight the most likely frequency range of the second harmonic of the heartbeat.Therefore,both the strong interference from respiration and its harmonics and the difficult problem of model order selection in the spectral peak estimation can be avoided.Experimental results from real measured data validate that the proposed method can achieve high-accuracy heart rate monitoring based on the 77GHz FMCW radar.

Key words: heart rate monitoring, vital signs monitoring, non-contact measurement method, frequency estimation, non-contact sensors

CLC Number: 

  • TN951