Abstract: This study used a 2.4 GHz four-channel phase- and quadrature self-injection-locked radar to detect vital signs of a moving person. A modified principal component analysis (MPCA) method was ...
Abstract: Device-free sensing using Wi-Fi channel state information (CSI) is a nonintrusive method of human activity recognition (HAR) in an urban built environment. In this article, we propose an HAR ...
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