WiFi CSI-based Long-Range Person Localization Using Directional Antennas
Keywords: Person Localization, Human Activity Recognition (HAR), WiFi, Channel State Information (CSI)
Abstract: To address limited sensing hardware options in WiFi-based Human Activity Recognition (HAR), we introduce a compact, cost-effective system pairing the Espressif ESP32-S3 microcontroller with a directional antenna for long-range sensing. Constructed exclusively with widely available off-the-shelf components, our solution is highly reproducible. Moreover, its ability to capture person-centric information over extended distances is evaluated in a localization experiment covering an area of 2.6m$\times$20m. In this experiment, a 3D location regression model, trained on Channel State Information (CSI) amplitude spectrograms and the walking trajectories of a person, achieves a promising test RMSE of 0.197m.
Submission Number: 48
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