Using Wi-Fi to Get 3D Images of Surrounding Location
The radio signals emitted by a commercial Wi-Fi router can act as a kind of radar, providing images of the transmitter’s environment, according to new experiments. Two researchers in Germany borrowed techniques from the field of holography to demonstrate Wi-Fi imaging. They found that the technique could potentially allow users to peer through walls and could provide images 10 times per second.
News article.
jones • May 16, 2017 8:23 AM
FYI, this is a new adaptation of a considerably older technique:
https://www.thefreelibrary.com/Lockheed+Martin%27s+%27Silent+Sentry(TM)%27+Surveillance+System+Receives…-a054592193
https://en.wikipedia.org/wiki/Passive_radar