期刊
IEEE SENSORS JOURNAL
卷 20, 期 17, 页码 10187-10198出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2020.2989780
关键词
Monitoring; Wireless fidelity; OFDM; Sensors; Data preprocessing; Biomedical monitoring; Fading channels; 5GHz WiFi; bimodal data; channel state information (CSI); healthcare; Internet of Things (IoT); vital sign monitoring
资金
- NSF [ECCS-1923163]
- Wireless Engineering Research and Education Center (WEREC) at Auburn University
Vital signs, such as respiration rate, can provide useful information for personal healthcare. In this paper, we present ResBeat, a commodity 5 GHz WiFi based system to exploit bimodal channel state information (CSI), including amplitude and phase difference, for realtime, long-term, and contact-free respiration rate monitoring. Specifically, we first present an analysis of breathing signal anomalies based on bimodal CSI data. Then, we present the design of the data preprocessing, adaptive signal selection, and breathing signal monitoring modules of ResBeat, and employ peak detection to estimate respiration rates. We conduct extensive experiments on respiration rate monitoring under three different environments, where superior performance over two alternative methods is demonstrated.
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