What is it about?
Breathing signal monitoring can provide important clues for health problems. Compared to existing tech- niques that require wearable devices and special equipment, a more desirable approach is to provide contact- free and long-term breathing rate monitoring by exploiting wireless signals. In this article, we propose Ten- sorBeat, a system to employ channel state information (CSI) phase difference data to intelligently estimate breathing rates for multiple persons with commodity WiFi devices. The main idea is to leverage the tensor de- composition technique to handle the CSI phase difference data. The proposed TensorBeat scheme first obtains CSI phase difference data between pairs of antennas at the WiFi receiver to create CSI tensors. Then canoni- cal polyadic (CP) decomposition is applied to obtain the desired breathing signals. A stable signal matching algorithm is developed to identify the decomposed signal pairs, and a peak detection method is applied to estimate the breathing rates for multiple persons. Our experimental study shows that TensorBeat can achieve high accuracy under different environments for multiperson breathing rate monitoring.
Photo by Misha Feshchak on Unsplash
Why is it important?
Smart connected health is an important problem. This paper utilizes WiFi to detect vital signs for multiple subjects, which is an important step towards smart connected health, to make healthcare cheaper and easier to deploy.
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This page is a summary of: TensorBeat, ACM Transactions on Intelligent Systems and Technology, January 2018, ACM (Association for Computing Machinery), DOI: 10.1145/3078855.
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