Cardiopulmonary Activity Monitoring with Contactless Microwave Sensor

The aim of this paper is to provide a contactless microwave sensor allowing continual remote monitoring of the heartbeat and respiratory rates. This work provides a comparative study to signal detection of heartbeat, considering different frequencies and transmission powers. In addition, a model based on cardiorespiratory measure is presented. This determines the most accurate signal processing technique for the lowest possible signal to noise ratio (SNR) values. This practical approach is a necessary step before dealing with the hardware implementation and system integration.

[1]  Olga Boric-Lubecke,et al.  Detection of Multiple Heartbeats Using Doppler Radar , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[2]  V. M. Lubecke,et al.  10 GHz Doppler radar sensing of respiration and heart movement , 2002, Proceedings of the IEEE 28th Annual Northeast Bioengineering Conference (IEEE Cat. No.02CH37342).

[3]  Jenshan Lin,et al.  Frequency-tuning technique for remote detection of heartbeat and respiration using low-power double-sideband transmission in the ka-band , 2006, IEEE Transactions on Microwave Theory and Techniques.

[4]  Huey-Ru Chuang,et al.  Microprocessor-controlled automatic clutter-cancellation circuits for microwave systems to sense physiological movements remotely through the rubble , 1990, 7th IEEE Conference on Instrumentation and Measurement Technology.

[5]  James C. Lin,et al.  Microwave Apexcardiography , 1979 .

[6]  Ghaïs El Zein,et al.  Multitunable microwave system for touchless heartbeat detection and heart rate variability extraction , 2010 .