Human Activity Recognition via Score Level Fusion of Wi-Fi CSI Signals

Wi-Fi signals are ubiquitous and provide a convenient, covert, and non-invasive means of recognizing human activity, which is particularly useful for healthcare monitoring. In this study, we investigate a score-level fusion structure for human activity recognition using the Wi-Fi channel state information (CSI) signals. The raw CSI signals undergo an important preprocessing stage before being classified using conventional classifiers at the first level. The output scores of two conventional classifiers are then fused via an analytic network that does not require iterative search for learning. Our experimental results show that the fusion provides good generalization and a shorter learning processing time compared with state-of-the-art networks.

Automated summary

In this study, a score-level fusion structure using Wi-Fi channel state information (CSI) signals for human activity recognition is investigated. The fusion provides a convenient, covert, and non-invasive means of recognizing human activity, particularly useful for healthcare monitoring. Experimental results show that the fusion provides good generalization and a shorter learning processing time compared with state-of-the-art networks.