Device-Free Human Activity Recognition Based on Dual-Channel Transformer Using WiFi Signals

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/wcmc/volume-2022/4598460/figures/4598460.fig.009a.svgz" name="4598460.fig.009a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Temporal channel only</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/wcmc/volume-2022/4598460/figures/4598460.fig.009b.svgz" name="4598460.fig.009b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Frequency channel only</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/wcmc/volume-2022/4598460/figures/4598460.fig.009c.svgz" name="4598460.fig.009c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Dual-channel</td></tr></table>

<div>The confusion matrix of activity recognition. (a) Only employ temporal channel. (b) Only employ frequency channel. (c) Employ dual-channel.</div>

Wireless Communications and Mobile Computing

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Figure 9

Figure 9: Device-Free Human Activity Recognition Based on Dual-Channel Transformer Using WiFi Signals 