Abstract
An integrated remote wireless sensor to measure respiration and heart rate without any contact is presented. The low-power wireless sensor system uses RF transceiver with embedded DSP algorithm to monitor cardiac and respiratory activities. The prototype system is implemented using a quadrature Low-IF Bluetooth transceiver at 2.4 GHz with a 30 KHz single-side band reference tone. The low-IF signal is digitized at 100 KHz and the embedded DSP algorithm estimates the Doppler phase shift, while reducing the system noise, LO phase noise, 1/f noise, DC offset, and minimizes the clutter, multi-path and echo signals. A new Pattern Search in Noise Subspace (PSNS) algorithm is used to estimate the sub-HZ phase shift due to heart and respiratory movement. The prototype system is tested in the lab with multiple individuals at 5-20 ft distance with less than 5% error.
Original language | English (US) |
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Title of host publication | IEEE Biomedical Circuits and Systems Conference: Engineering for Healthy Minds and Able Bodies, BioCAS 2015 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Print) | 9781479972333 |
DOIs | |
State | Published - Dec 4 2015 |
Event | 11th IEEE Biomedical Circuits and Systems Conference, BioCAS 2015 - Atlanta, United States Duration: Oct 22 2015 → Oct 24 2015 |
Other
Other | 11th IEEE Biomedical Circuits and Systems Conference, BioCAS 2015 |
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Country/Territory | United States |
City | Atlanta |
Period | 10/22/15 → 10/24/15 |
Keywords
- Biomedical monitoring
- Biomedical telemetry
- Doppler radar
- MUSIC
- Patient monitoring
- Subspace spectrum estimation
ASJC Scopus subject areas
- Biotechnology
- Instrumentation
- Biomedical Engineering
- Electrical and Electronic Engineering