In this article we present SHARP, an original approach for obtaining human activity recognition (HAR) through the use of commercial IEEE 802.11 (Wi-Fi) devices. SHARP grants the possibility to discern the activities of different persons, across different time-spans and environments. To achieve this, we devise a new technique to clean and process the channel frequency response (CFR) phase of the Wi-Fi channel, obtaining an estimate of the Doppler shift at a radio monitor device. The Doppler shift reveals the presence of moving scatterers in the environment, while not being affected by (environment-specific) static objects. SHARP is trained on data collected as a person performs seven different activities in a single environment. It is then tested on different setups, to assess its performance as the person, the day and/or the environment change with respect to those considered at training time. In the worst-case scenario, it reaches an average accuracy higher than 95%, validating the effectiveness of the extracted Doppler information, used in conjunction with a learning algorithm based on a neural network, in recognizing human activities in a subject and environment independent way. The collected CFR dataset and the code are publicly available for replicability and benchmarking purposes [1]. © 2002-2012 IEEE.

Meneghello F., Dal Fabbro N., Garlisi D., Tinnirello I., Rossi M. (2023). A CSI Dataset for Wireless Human Sensing on 80 MHz Wi-Fi Channels. IEEE COMMUNICATIONS MAGAZINE, 61(9), 146-152 [10.1109/MCOM.005.2200720].

A CSI Dataset for Wireless Human Sensing on 80 MHz Wi-Fi Channels

Garlisi D.
;
Tinnirello I.;
2023-09-01

Abstract

In this article we present SHARP, an original approach for obtaining human activity recognition (HAR) through the use of commercial IEEE 802.11 (Wi-Fi) devices. SHARP grants the possibility to discern the activities of different persons, across different time-spans and environments. To achieve this, we devise a new technique to clean and process the channel frequency response (CFR) phase of the Wi-Fi channel, obtaining an estimate of the Doppler shift at a radio monitor device. The Doppler shift reveals the presence of moving scatterers in the environment, while not being affected by (environment-specific) static objects. SHARP is trained on data collected as a person performs seven different activities in a single environment. It is then tested on different setups, to assess its performance as the person, the day and/or the environment change with respect to those considered at training time. In the worst-case scenario, it reaches an average accuracy higher than 95%, validating the effectiveness of the extracted Doppler information, used in conjunction with a learning algorithm based on a neural network, in recognizing human activities in a subject and environment independent way. The collected CFR dataset and the code are publicly available for replicability and benchmarking purposes [1]. © 2002-2012 IEEE.
set-2023
https://arxiv.org/pdf/2305.03170.pdf
Meneghello F., Dal Fabbro N., Garlisi D., Tinnirello I., Rossi M. (2023). A CSI Dataset for Wireless Human Sensing on 80 MHz Wi-Fi Channels. IEEE COMMUNICATIONS MAGAZINE, 61(9), 146-152 [10.1109/MCOM.005.2200720].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/613293
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