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- W4226076537 abstract "Falling is a common health problem for elderly people. Early detection of falls allows earlier rescue measures to be implemented. Most existing Wi-Fi-based fall detection systems employ learning-based methods, which require large amounts of labeled data for prior training. To address this issue, we in this paper present AFall, a robust model-based fall detection system that does not require prior training for a single person based on Wi-Fi Channel State Information (CSI). Different from previous Wi-Fi-based fall detection systems, we model the relationship between human falls and changes of Angle of Arrival (AoA) of Wi-Fi signals reflected from human body by multiple signal classification (MUSIC) algorithm. In particular, we deploy two receivers in orthogonal spatial layouts to capture diversified AoA information. Since AoA reflected from human body is independent of environments and subjects, the performance of AFall can remain stable when the environment changes slightly, which can meet the daily needs of the elderly people. We implement AFall using commodity Wi-Fi devices and evaluate it in five different indoor environments. The experimental results demonstrate that AFall achieves an average accuracy of 84.31% and an average F1 score of 84.56%." @default.
- W4226076537 created "2022-05-05" @default.
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- W4226076537 date "2023-08-01" @default.
- W4226076537 modified "2023-09-27" @default.
- W4226076537 title "AFall: Wi-Fi-Based Device-Free Fall Detection System Using Spatial Angle of Arrival" @default.
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- W4226076537 doi "https://doi.org/10.1109/tmc.2022.3157666" @default.
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