Your WiFi Router Has a Superpower You Didn’t Know

Nobody Ever Thought That You Can See The Number of Person Present In The Room but An Professor Did It , Lets See..  

Hey Guy
Welcome to the Learn4hack..
Today's post is much interesting...
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So guys ,
have u seen "Dark night Movie" actually i save seen the movie i noticed that there is a one technology in which batman and fox used a technology which known as MOBILE SPYING TECHNOLOGY.

" The electrical engineers from the University of California has found a way by which the number of people in a room could be calculated by the WiFi power measurement. "Its much interesting that we can see how many people in that room.

Let's see which method work on that nd wht is a PRINCIPAL behind the Technology...

Here this is introduced by an  professor of University of California name is MOSTFI.

“Our approach can estimate the number of people walking in an area, based on only the received power measurements of a WiFi link" said MOSTFI.
With this approach, we don’t need any WiFi enabled electronic communication device to count the people..

●PRINCIPAL BEHIND THE TECHNOLOGY

To count the number of people, the researchers put two WiFi nodes located in the opposite directions in a 70-sq-meter area. Now by calculating the power measurement in that particular area by those nodes, the number of people were accurately estimated up to nine people- in both outdoor and indoor locations. When people crossed the team between these two nodes, the WiFi signal dropped a bit and vice-versa.

Here,
we show extensive experimental results where a pair of WiFi cards (TX: D-link WBR1310 wireless router and RX: Atheros ar5006x card) are used for counting up to and including 9 people. We show the performance in both outdoor and indoor environments (shown above), as well as with both directional and omnidirectional antennas. In the directional case, an external directional antenna is connected to the WiFi card to limit multipath fading (see the paper for more on this). In the omnidirectional case, the WiFi card and its antenna are used..

Mostfi said, “This is about counting walking people, which is very challenging, counting this many people in such a small area with only WiFi power measurements of one link is a hard problem, and the main motivation for this work.”
This finding related to WiFi signals could be used in various applications like estimation of people to make smart buildings, air-conditioning capacity etc. Apart from these, this could also be used in security related areas.
Thts it guyz.. 
For more research click on the Link ..

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