CSI-based human behavior segmentation and recognition using commodity Wi-Fi

EURASIP Journal on Wireless Communications and Networking

Research

Liangbo Xie¹  Xiaolong Yang¹  Xinxing Tang¹  Jinglong Cheng¹ 

[1] School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China;Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, China;

关键词: Behavior recognition;    Behavior segmentation;    Channel state information;    Graph neural network;   

DOI  :  10.1186/s13638-023-02252-5

 received in 2022-09-19, accepted in 2023-05-17,  发布年份 2023

来源: Springer

【 摘 要 】

In recent years, the behavior recognition technology based on Wi-Fi devices has been favored by many researchers. Existing Wi-Fi-based human behavior recognition technology mainly uses classification algorithms to construct classification models, which has problems such as inaccurate behavior segmentation, failure to extract deep-level features from the original data and design classification models matching the proposed features in the process of behavior recognition. In order to solve above problems, this paper proposes a window variance comparison method by combining the adaptive thresholds calculated to achieve effective segmentation of multiple discontinuous human behaviors, then uses the short-time Fourier algorithm to extract time-frequency features of individual behavior, and extracts the graph structure data from the autocorrelation matrix of time-frequency features and the features themselves. A graph neural network is built for behavior recognition. The experimental results show that the segmentation accuracy of the behavior segmentation method in the two scenes is 0.964 and 0.993, which is better than the existing threshold-based behavior segmentation methods. In addition, this paper extracts graph structure data by spectral energy change method and builds behavior recognition model by using graph neural network, and the recognition accuracy is significantly improved compared with the traditional classification algorithm.

【 授权许可】

CC BY   
© The Author(s) 2023

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