Open Access Open Access  Restricted Access Subscription or Fee Access

Remote Heartbeat Detection Using Microwave System from Four Positions of a Normally Breathing Patient

(*) Corresponding author

Authors' affiliations



This paper presents a microwave system for the detection of the cardiopulmonary activity. Measurements are performed at different operational frequencies and from different sides of a healthy subject who is breathing normally while sitting at 1 meter from the system. Simultaneously with the microwave system, a PC-based electrocardiograph is used in order to validate the heartbeat rate detection. Cardiopulmonary signals are processed using wavelet transforms in order to extract the heartbeat signal. The obtained results upon using the proposed system show the ability of detecting the cardiopulmonary signals at four sides of the subject, and the signal processing techniques show high accuracy in extracting the heartbeat signal and the heartbeat rate.
Copyright © 2016 Praise Worthy Prize - All rights reserved.


Doppler Radar; Electrocardiograph; Heartbeat Rate; Microwave System; Noncontact Detection

Full Text:



J. Kuutti, M. Paukkunen, M. Aalto, P. Eskelinen, R. E. Sepponen, Evaluation of a Doppler radar sensor system for vital signs detection and activity monitoring in a radio frequency shielded room, Measurement, Volume 68, May 2015, Pages 135–142.

G. Wang, C. Gu, T. Inoue, C. Li, A hybrid FMCW- Interferometry Radar for indoor precise positioning and versatile life activity monitoring, Microwave Theory and Techniques, IEEE Transactions, Volume 62, (Issue 11), November 2014, Pages 2812-2822.

A. Rahman, E. Yavari, G. Xiaomeng, V. Lubecke, O. Boric-Lubecke, Signal processing techniques for vital sign monitoring using mobile short range Doppler radar, IEEE conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS), pp. 1-3, San Diego, CA, 25-28 Jan., 2015.

G. Wang, J.-M. Munoz-Ferreras, R. Gomez-Garcia, C. Li, Clutter interference reduction in coherent FMCW radar for weak physiological signal detection, IEEE International conference on Microwave Symposium (IMS), pp. 1-4, Tampa, FL, 1-6 June, 2014.

L. Crocco, V. Ferrara, A review on ground penetrating radar technology for the detection of buried or trapped victims, IEEE International conference on Collaboration Technologies and Systems (CTS), pp. 535–540,Minneapolis, 19-23 May, 2014.

C. Li, V. M. Lubecke, O. Boric-Lubecke, J. Li, A Review on Recent Advances in Doppler Radar Sensors for Noncontact Healthcare Monitoring, IEEE Transactions on Microwave Theory and Techniques, Volume 61, (Issue 5), May 2013, Pages 2046-2060 .

J. Li, L. Liu, Z. Zeng, F. Liu, Advanced Signal Processing for Vital Sign Extraction With Applications in UWB Radar Detection of Trapped Victims in Complex Environments, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Volume 7, (Issue 3), May 2013, Pages 783–791.

M. K. Singh, A. Gupta, S. Permanand, U. Singh, O. P. Singh, Y. H. Kim, A. K. Singh, System modeling and signal processing of microwave Doppler radar for cardiopulmonary sensing, Signal Processing and Communication (ICSC), pp. 227-232, Noida, March 2015.

S. El-Samad, D. Obeid, G. Zaharia, S. Sadek, G. El Zein, Contact-Less measurement system or cardiopulmonary activity, Proc. of 2014 Mediterranean Microwave Symposium (MMS), pp. 1-4, Marrakech, December 2014.

W.Hu, Z. Zhao, Y. Wang, H. Zhang, F. Lin, Noncontact Accurate Measurement of Cardiopulmonary Activity Using a Compact Quadrature Doppler Radar Sensor, IEEE Transactions on Biomedical Engineering, Volume 61, (Issue 3), November 2013, Pages 725–735.

H. Zhang, S. Li, X. Jing, P. Zhang, Y. Zhang, T. Jiao, G. Lu, J. Wang, The Separation of the Heartbeat and Respiratory Signal of a Doppler Radar Based on the LMS Adaptive Harmonic Cancellation Algorithm, International Symposium on Computational Intelligence and Design (ISCID), Vol. 1, pp. 362-364, Hangzhou, October 2013.

D. Obeid, G. Zaharia, S. Sadek, G. El Zein, “Microwave Doppler radar for heartbeat detection vs electrocardiogram,” Microwave and Optical Technology Letters, Volume 54, (Issue 11), November 2012, Pages 2610-2617.

P. Byung-Kwon, S. Yamada, O. Boric-Lubecke, V. Lubecke, Single channel receiver limitations in Doppler radar measurements of periodic motion, Radio and Wireless Symposium, IEEE, pp. 99–102, San Diego, January 2006.

D. Obeid, S. Sadek, G. Zaharia, G. El Zein, Multitunable microwave system for touch less heartbeat detection and heart rate variability extraction, Microwave and Optical Technology Letters, Volume 52, (Issue 1), January 2010, Pages 192–198.

G. A. Blackburn, J. GarkeFerwerda, Retrieval of chlorophyll concentration from leaf reflectance spectra using wavelet analysis, Remote Sensing of Environment, Volume 112, (Issue 4), April 2008, Pages 1614-1632.

American National Standard, Cardiac monitors, heart rate meters, and alarms (ANSI/ AAMI EC1, 2002).


  • There are currently no refbacks.

Please send any question about this web site to
Copyright © 2005-2024 Praise Worthy Prize