期刊
SENSORS
卷 23, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/s23063116
关键词
IR-UWB radar; noncontact; vital-sign monitoring; real time; deep learning
In this study, a deep learning framework was developed to estimate the respiration rate (RR) and heart rate (HR) in real time during sleep using contactless impulse radio ultrawide-band (IR-UWB) radar. The framework showed promising results with average mean absolute errors of 2.67 for RR and 4.78 for HR. This model has potential applications in health management through vital sign monitoring in home environments.
Vital signs provide important biometric information for managing health and disease, and it is important to monitor them for a long time in a daily home environment. To this end, we developed and evaluated a deep learning framework that estimates the respiration rate (RR) and heart rate (HR) in real time from long-term data measured during sleep using a contactless impulse radio ultrawide-band (IR-UWB) radar. The clutter is removed from the measured radar signal, and the position of the subject is detected using the standard deviation of each radar signal channel. The 1D signal of the selected UWB channel index and the 2D signal applied with the continuous wavelet transform are entered as inputs into the convolutional neural-network-based model that then estimates RR and HR. From 30 recordings measured during night-time sleep, 10 were used for training, 5 for validation, and 15 for testing. The average mean absolute errors for RR and HR were 2.67 and 4.78, respectively. The performance of the proposed model was confirmed for long-term data, including static and dynamic conditions, and it is expected to be used for health management through vital-sign monitoring in the home environment.
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