Low-power WiFi system tracks humans, even behind walls - R & D Magazine

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Low-power WiFi system tracks humans, even behind walls (http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNF5Xq6_KKjBKA_RYJXTTnElJ01v2w&url=http://www.rdmag.com/news/2013/06/low-power-wifi-system-tracks-humans-even-behind-walls)
R & D Magazine
As a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the ...





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