The approach involves three radio antennas—two transmitting and one receiving, pointed at a wall. In the demo, a person walked around the room on the other side of the wall. The system represented that person as a red dot on a computer screen. and could place the person on the other side of the wall n MIT project can track a user with an accuracy of +/- 10 centimeters. Earlier this year, another report from MIT that was following the CSAIL project’s progress, noted that while researchers have long attempted to build a device capable of seeing people through walls, previous efforts involved expensive and bulky radar technology. The system at MIT uses low-cost technology. The goal is to come up with a device that is low-power, portable and simple enough for use to see through walls and closed doors.
Possible scenarios making use of such a system include law enforcement, to avoid personnel walking into an ambush; hostage standoffs; emergency responders trying to see through collapsed structures; and gaming. In addition, the system could be put to use for everyday needs in monitoring children and the elderly.
Read more at: Phys.org