481
Views
30
Downloads
0
Crossref
N/A
WoS
0
Scopus
N/A
CSCD
When a human body moves within the coverage range of Wi-Fi signals, the reflected Wi-Fi signals by the various parts of the human body change the propagation path, so analysis of the channel state data can achieve the perception of the human motion. By extracting the Channel State Information (CSI) related to human motion from the Wi-Fi signals and analyzing it with the introduced machine learning classification algorithm, the human motion in the spatial environment can be perceived. On the basis of this theory, this paper proposed an algorithm of human behavior recognition based on CSI wireless sensing to realize deviceless and over-the-air slide turning. This algorithm collects the environmental information containing upward or downward wave in a conference room scene, uses the local outlier factor detection algorithm to segment the actions, and then the time domain features are extracted to train Support Vector Machine (SVM) and eXtreme Gradient Boosting (XGBoost) classification modules. The experimental results show that the average accuracy of the XGBoost module sensing slide flipping can reach 94%, and the SVM module can reach 89%, so the module could be extended to the field of smart classroom and significantly improve speech efficiency.
When a human body moves within the coverage range of Wi-Fi signals, the reflected Wi-Fi signals by the various parts of the human body change the propagation path, so analysis of the channel state data can achieve the perception of the human motion. By extracting the Channel State Information (CSI) related to human motion from the Wi-Fi signals and analyzing it with the introduced machine learning classification algorithm, the human motion in the spatial environment can be perceived. On the basis of this theory, this paper proposed an algorithm of human behavior recognition based on CSI wireless sensing to realize deviceless and over-the-air slide turning. This algorithm collects the environmental information containing upward or downward wave in a conference room scene, uses the local outlier factor detection algorithm to segment the actions, and then the time domain features are extracted to train Support Vector Machine (SVM) and eXtreme Gradient Boosting (XGBoost) classification modules. The experimental results show that the average accuracy of the XGBoost module sensing slide flipping can reach 94%, and the SVM module can reach 89%, so the module could be extended to the field of smart classroom and significantly improve speech efficiency.
C. Wang, S. Chen, Y. Yang, F. Hu, F. Liu, and J. Wu, Literature review on wireless sensing-Wi-Fi signal-based recognition of human activities, Tsinghua Science and Technollogy, vol. 23, no. 2, pp. 203–222, 2018.
S. Yue, Y. Yang, H. Wang, H. Rahul, and D. Katabi, BodyCompass: Monitoring sleep posture with wireless signals, Proc. ACM Interact. Mob. Wearable Ubiquit. Technol., vol. 4, no. 2, pp. 1–25, 2020.
K. Qian, C. Wu, Z. Yang, Y. Liu, F. He, and T. Xing, Enabling contactless detection of moving humans with dynamic speeds using CSI, ACM Trans. Embedd. Comput. Syst., vol. 17, no. 2, pp. 1–18, 2018.
T. Hang, Y. Zheng, K. Qian, C. Wu, Z. Yang, X. Zhou, Y. Liu, and G. Chen, WiSH: WiFi-based real-time human detection, Tsinghua Science and Technollogy, vol. 24, no. 5, pp. 615–629, 2019.
L. Zhang, C. Wang, M. Ma, and D. Zhang, WiDIGR: Direction-independent gait recognition system using commercial Wi-Fi devices, IEEE Intern. Things J., vol. 7, no. 2, pp. 1178–1191, 2019.
B. Yu, Y. Wang, K. Niu, Y. Zeng, T. Gu, L. Wang, C. Guan, and D. Zhang, WiFi-Sleep: Sleep stage monitoring using commodity Wi-Fi devices, IEEE Intern. Things J., vol. 8, no. 18, pp. 13900–13913, 2021.
H. Chen, Y. Zhang, W. Li, X. Tao, and P. Zhang, ConFi: Convolutional neural networks based indoor Wi-Fi localization using channel state information, IEEE Access, vol. 5, pp. 18066–18074, 2017.
J. Gu, J. Wang, L. Zhang, Z. Yu, X. Xin, and Y. Liu, Spotlight: Hot target discovery and localization with crowdsourced photos, Tsinghua Science and Technollogy, vol. 25, no. 1, pp. 68–80, 2019.
Z. Song, Z. Cao, Z. Li, J. Wang, and Y. Liu, Inertial motion tracking on mobile and wearable devices: Recent advancements and challenges, Tsinghua Science and Technollogy, vol. 26, no. 5, pp. 692–705, 2021.
Z. Zhang, X. Cong, W. Feng, H. Zhang, G. Fu, and J. Chen, WAEAS: An optimization scheme of EAS scheduler for wearable applications, Tsinghua Science and Technollogy, vol. 26, no. 1, pp. 72–84, 2020.
X. Zhang, C. Xiu, Y. Wang, and D. Yang, High-precision WiFi indoor localization algorithm based on CSI-XGBoost, J. Beijing Univ. Aeronaut. Astronaut., vol. 44, no. 12, pp. 2536–2544, 2018.
C. C. Chang and C. J. Lin, LIBSVM: A library for support vector machines, ACM Trans. Intell. Syst. Technol., vol. 2, no. 3, pp. 1–27, 2011.
This work was supported by the Special Zone Project of National Defense Innovation.
This work is available under the CC BY-NC-ND 3.0 IGO license:https://creativecommons.org/licenses/by-nc-nd/3.0/igo/