Joey Wilson and Neal Patwari of the University of Utah describe and demonstrate their through-wall wireless network tracking system. Joey enters a home surrounded by simple radio devices. He does not carry any kind of electronic device on his body, nor are any devices deployed inside the home, and the system is able to estimate his location.
You need to be a member of Peacepink3 to add comments!
Comments
here is a link in youtube a lecture from MIT on electricity & magnetism,
they tackle and demonstrate the idea on FIBER OPTIC
http://youtu.be/ab0czJ6_OF8
maybe this can help you about "infra red devices".