Comments on: See through walls via wireless network

By: ReKlipz

ReKlipz — Fri, 02 Oct 2009 06:49:53 +0000

@saimhe

The article doesn’t mention anything other than 802.15.4, which can be any of three ranges of frequencies. [1] I would assume this is 2.4GHz though, which means it may be feasible with 802.11, depending on the topology type they were using and whether or not the same signal attributes are available in the 802.11 specification.

[1] http://en.wikipedia.org/wiki/IEEE_802.15.4-2006#The_physical_layer

By: cde

cde — Fri, 02 Oct 2009 05:35:41 +0000

I can also figure out if a wifi signal exists or not if someone moves. Physical intrusions in a wifi path kill my pirated signal :O

By: Bob38

Bob38 — Fri, 02 Oct 2009 05:28:56 +0000

Time to put up the metal wallpaper in every room of the house.

By: calebkraft

calebkraft — Fri, 02 Oct 2009 01:05:01 +0000

@coyote,
wrong story I think. was that meant for the power producing backpack?

By: cptfalcon

cptfalcon — Fri, 02 Oct 2009 00:37:32 +0000

in batman they had a much more complex problem, the positions of the receivers were not known with fine granularity beyond gps/cell triangulation, where in this case it seems the locations were fairly well known.

By: Insipid Melon

Insipid Melon — Thu, 01 Oct 2009 23:54:12 +0000

please don’t mention that part of the movie it was pretty embarassing

By: scott topic

scott topic — Thu, 01 Oct 2009 23:37:45 +0000

didn’t they do this in batman? with cell phones.

By: Kee Coyote

Kee Coyote — Thu, 01 Oct 2009 22:54:19 +0000

Combine with a power generating bra and women in the infratry will have more power for their equipment than men. :D

By: James

James — Thu, 01 Oct 2009 22:35:28 +0000

Not really radar though is it, as that uses phase scattering, this uses intensity measurement? Still an interesting use of existing kit, I like it. Maybe its RIMDAR? (Radio intensity motion detection and ranging) :-)

By: saimhe

saimhe — Thu, 01 Oct 2009 21:42:53 +0000

Perhaps a RADAR but based on communications modules available to anyone. From the article:

“They’ve even tested the idea with a 34-node wireless network using the IEEE 802.15.4 wireless protocol, the protocol for personal area networks employed by home automation services such as ZigBee.”

Now I’m wondering how thick the walls can be; and would it eventually be possible to build a georadar with useful range (yes, a lot sexier than a metal detector).

By: tinker monkey

tinker monkey — Thu, 01 Oct 2009 21:24:26 +0000

I think this amazing new discovery is called Radio Active Detecting And Range-ing .RADAR ! ! !

By: justin

justin — Thu, 01 Oct 2009 21:22:30 +0000

First:cool as hell
Second: Maybe I am missing something but I wonder if this could be implemented with standard wifi, if not could some one give me an explanation as to why not, I am thinking to much interference.
Thanks

By: monkeyslayer56

monkeyslayer56 — Thu, 01 Oct 2009 20:40:15 +0000

cool my not be the best way of doing things but still very cool

By: samurai

samurai — Thu, 01 Oct 2009 20:37:56 +0000

@Tim
Ok, I trust you.

(???)

By: Tim

Tim — Thu, 01 Oct 2009 20:05:56 +0000

Trust me, this will never be practical.