1. Presented by
1Snehal Jaiswal
2Dipali Khond

2. Snehal-
 History
 What Wi-Vi is?
 Operating principle
-how it works?
Dipali-
 Development &futuristic uses
 Conclusion

3.  Its research has been done prominently at
MIT’s Computer Science and Intelligence
Laboratory.
 By Dina Kitabi ,a professor in MIT’s
Department of Electrical engineering and
computer science ,and her graduate student
Fadel Adib.

4.  WI-VI is a wireless device that captures
moving objects behind a wall using low
power WI-FI signal.
 This tech uses reflected WI-FI signal to track
movements of people behind wall.

5.  Based on the principle of RADAR and SONAR
imaging(doppler effect).
 It’s similar to the way radar and sonar work
but without the expensive ,bulky gear and
restricted frequencies that radar requires.
 Depends on its own transmitting signal.

6.  Wi-Vi relies on a simple hardware of 2.4 GHZ
WI-FI radios.
 WI-FI signals easily penetrate through walls.
 Small enough to be portably used.
 Integrated in hand held devices.

7.  WI-VI uses two transmitting antennas and a
receiver.
 Transmitting signals are low power WI-FI
signals.
 The two antennas transmit almost identical
signals, except the second antenna’s signal is
a inverse of first ,resulting in its interference.

9.  As the person moves through the rooms, his
or her distance from the receiver
changes, meaning the time it takes for the
reflected signal to make its way back to the
receiver changes.

11.  Low cost
 Low power
 Small size

12.  Low resolution.
 Short range of communication.
 Low quality of images.

13.  Possible use in smart phones as a hand held
device.
 Monitoring situations in
hospitals,malls,hotels, etc.
 Disaster recovery
 Gaming
 Military purpose

15.  Smart hand held device which give an insight
vision through walls.
 Could prove to be very powerful device for
defence purpose.
 Further improvement will allow WI-VI to
become more expressive hence hoping new
directions of virtual reality.

16.  www.seminarsonly.com
 www.mit.com
 www.gizmag.com
 www.electronicstoday.com
 www.techhive.com