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Researchers can identify people through walls by using wireless signals


RF device

Researchers at MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) have created a device that allows them to “see” what a person is doing and track his or her movement even if that person is located behind a wall, and does not hold or wear any other device that would enable tracking.

The device, called RF Capture, transmits specific radio frequency (RF) signals aimed at the wall. While the signals pass through the wall, they reflect off a person’s body back to the device, which then uses them to create a silhouette of the person, and track its movements.

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