Researchers train drones to use Wi-Fi to look through walls


A new system by University of California, Santa Barbara researchers Yasamin Mostofi and Chitra R. Karanam uses two drones, a massive Wi-Fi antenna, and a little interpolation to literally see through solid walls.

The system is two-fold. The one drone blasts Wi-Fi through the structure and another picks up the signal. Then, working in tandem, the two drones fly around the solid structure until it maps the differences in wave strength at different points. Using this information the researchers have been able to create a 3D model of a closed building.

In the video below you can see the drones idly flying around a brick structure. They cannot see inside. As the waves penetrate the brick they change as they pass through other structures behind the wall. After a few passes the drones…

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