So I assume this tinfoil hat just gives me a greater Wi-Radar cross section. Clearly once the NSA starts deploying this widely I'm going to need a tinfoil yurt.
Through-wall tracking of humans using Wi-Fi: Now more accurate, low power
The MIT boffins that earlier this year demonstrated the ability to “see through walls” using Wi-Fi has now unveiled a more accurate version, WiTrack, that can locate a person in three dimensions, within 10-20 cm, through walls and obstructions. Unlike the earlier Wi-Vi project, the new work by Dina Katabi, Fadel Adib and their …
-
Thursday 12th December 2013 05:20 GMT F111F
End of the Couch Potato?
So, if an entrepreneur were smart, he could build a reproduction of a walk-through of DOOM or some other first person shooter type game, put projection displays on the various walls linked to the game and track/feedback the gamer with this tracking system?
If he then linked it with other walk-throughs, you could have multiple teams duking it out...World of Warcraft in 3-D?
-
-
Thursday 12th December 2013 07:43 GMT Mr C
Re: Yep!
We've done work using very similar concepts about 15 years ago, instead of wifi using sound.
Although the video doesn't mention it i know that this will only work if the receivers have been positioned with accuracy and exact position in relation to each other, with a decent calibration cycle before before you can get any sort of usable accuracy.
Meaning that this technology will only be useful in predetermined areas / setups, in rooms where technicians had time to work and set it up correctly.
NCIS-style-walk-in-the-room-press-a-button-and-see-through-walls isn't going to happen from this any time soon.
-
-
Thursday 12th December 2013 08:57 GMT Pete 2
Big is better
> military are high powered, heavy, and demanded large antenna arrays
Well, yes.
Because military radar isn't used to detect whether the general in the next room has fallen of his/her's perch. The problem with RADAR is that it suffers from an inverse squared, SQUARED law. I.e. 1 / (r ** 4) power/distance relationship. The signal going out from the transmitter is the normal 1/r^2 degradation with distance to the target and the signal reflected off the target (assuming it's "playing the game" by not being stealthy) comes back with the same power::distance ratio. Hence the need for massive amounts of power, huge receiving (and transmitting) antennae and therefore large installations.
I'm sure that given their expertise in the area, the military are more than capable of making a bitsy little version - and could / would / probably-have if there was a requirement ... say from the clandestine services.
Now where did I put that foil-backed wallpaper?
-