Microwave measurement of heart beat applied to daily life

Microwave reflectometric measurement is applied to diagnose human vital signal. The reflectometer signal is processed by a quadrature phase detector in order to obtain both phase and amplitude components of the signal. The phase component is analyzed by using fast-Fourier transform and wavelet transform to evaluate the frequency spectrum of the heartbeat and respiration. In this report, we focus on some challenges such as overnight monitoring and the performance during driving vehicle. The system using Automatic Gain Control (AGC) and integration of reflectometry system are also discussed.

[1]  Jin Joo Choi,et al.  Measurement of human heartbeat and respiration signals using phase detection radar. , 2007, The Review of scientific instruments.

[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]  Jenshan Lin,et al.  Range correlation and I/Q performance benefits in single-chip silicon Doppler radars for noncontact cardiopulmonary monitoring , 2004, IEEE Transactions on Microwave Theory and Techniques.

[5]  A. Mase,et al.  Microwave Measurement of Heart Beat and Analysis Using Wavelet Transform , 2007, 2007 Asia-Pacific Microwave Conference.