New WiVi Can See Through Walls
A new system being developed by MIT’s Department of Electrical Engineering and Computer Science could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. According to MIT Professor Dina Katabi, “We wanted to create a device that is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors,” Katabi says.
The system, called “Wi-Vi,” is based on a concept similar to radar and sonar imaging. But rather than using a band of the electromagnetic spectrum that is available only to the military, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall.