A Framework for Human Activity Recognition Based on WiFi CSI Signal Enhancement

<div>Sliding window variance and N-iterative signal enhancement. (a) The sliding window variance of subcarrier No. 24 of bending action; (b) N-iterative signal enhancement of No. 24 subcarrier of bending action.</div>

International Journal of Antennas and Propagation

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Figure 5

Figure 5: A Framework for Human Activity Recognition Based on WiFi CSI Signal Enhancement 