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    Wivi

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    jignas dagadapulla
    Wi-Vi is a technology developed by researchers at MIT that uses Wi-Fi signals to detect and track moving objects like people behind walls. It relies on inexpensive Wi-Fi hardware and works by transmitting low-power Wi-Fi signals that reflect off static objects like walls, but can detect movement based on the Doppler effect. While current resolutions are low, Wi-Vi has applications in security, emergency response, and interactive gaming and has potential to evolve to see through denser materials and at longer ranges with higher quality images.

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    Wivi

    Uploaded by

    jignas dagadapulla
    72 views17 pages
    Wi-Vi is a technology developed by researchers at MIT that uses Wi-Fi signals to detect and track moving objects like people behind walls. It relies on inexpensive Wi-Fi hardware and works by transmitting low-power Wi-Fi signals that reflect off static objects like walls, but can detect movement based on the Doppler effect. While current resolutions are low, Wi-Vi has applications in security, emergency response, and interactive gaming and has potential to evolve to see through denser materials and at longer ranges with higher quality images.

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    Wi-Vi is a technology developed by researchers at MIT that uses Wi-Fi signals to detect and track moving objects like people behind walls. It relies on inexpensive Wi-Fi hardware and works by transmitting low-power Wi-Fi signals that reflect off static objects like walls, but can detect movement based on the Doppler effect. While current resolutions are low, Wi-Vi has applications in security, emergency response, and interactive gaming and has potential to evolve to see through denser materials and at longer ranges with higher quality images.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    72 views17 pages

    Wivi

    Uploaded by

    jignas dagadapulla
    Wi-Vi is a technology developed by researchers at MIT that uses Wi-Fi signals to detect and track moving objects like people behind walls. It relies on inexpensive Wi-Fi hardware and works by transmitting low-power Wi-Fi signals that reflect off static objects like walls, but can detect movement based on the Doppler effect. While current resolutions are low, Wi-Vi has applications in security, emergency response, and interactive gaming and has potential to evolve to see through denser materials and at longer ranges with higher quality images.

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    You are on page 1of 17

    WI-VI (WIreless-VIsion)

    Introduction

    ● Wi-Vi was created by Dina Katabi ,a professor in


    MIT,and her graduate student Fadel Adib.
    ● Wi-vi stands for wireless vision.
    ● It captures movig objects behind the wall.
    ● Device uses typically Wi-Fi hardware.
    What can Wi-Vi do?
    Why use Wi-Fi Signals?

    ● Wi-Fi signals can easily penetrate through walls.


    ● Wi-Vi relies on a simple hardware of 2.GHz Wi-Fi radios
    ● small enough to be portably used.
    ● Integrated in hand held devices.
    ● Low power Wi-Fi signals are used.
    Basic Principle & Working

    ● Based on the principle of RADAR and SONAR imaging.


    ● RADAR and SONA work on the Doppler effect.
    ●  This technology uses reflected Wi-Fi signals to track the
    movement of people behind walls.
    ● It uses two transmitting antennas and a single receiver.
    ●  Transmitting signals are low power Wi-Fi signals.
    ●  The two antennas transmit almost identical signals,
    except the second antenna’s signal is the inverse of the
    first.
    ● Any static objects that the signals hit including the wall
    create identical reflections and they get cancelled out. 
    ● As the person moves through the room, his or her
    distance from, receiver changes and remains
    detectable.
    Challenges Faced:

    ● Flash Effect:
    ● When you take a device, point it at a wall, and transmit Wi-Fi
    signals, a huge amount of reflection is going to come from the
    wall itself.This reflection is 10000* of the beyond wall object’s
    reflection.
    Gesture Based Communication:

    ● Wi-Vi enables a human who does not carry any wireless


    device to communicate commands or short messages to
    a receiver using simple gestures.
    ● It designates a pair of gestures as a ‘0’ bit and ‘1’ bit.
    ● A human can compose these gestures to create
    messages that have different interpretations.
    Advantages:

    ● Wi-vi require same bandwidth & operates in the same


    range as Wi-Fi.
    ● Wi-vi can perform, through wall imaging without access to
    any device on the other side of the wall.
    ● Wi-vi employs signals whose wavelength are 12.5 cm.
    ● Extend human vision beyond the visible electromagnetic
    range, allowing us to detect objects in the dark or in
    smoke.
    Limitations:

    ● Display has very low resolution.


    ● We cannot detect humans behind concrete walls thicker than
    8”.
    ●  To achieve a narrow beam the human needs to move by
    about 50 cm.
    Applications:
    ● Law enforcement:
    ●  Law enforcement personnel can use the device to avoid walking into an ambush,
    and minimize casualties in standoffs and hostage situations.
    Emergency situations:
    ●  Emergency responders can use it to see through rubble and collapsed structures.
    ● Personal Security:
    ● Common users can use it for intrusion detection, or when stepping into dark alleys
    and unknown places.
    ● Smart Sensing:
    ● Wi-Vi can be extended to sense motion in different parts of a building and allow
    automated control of heating/cooling and lighting systems.
    ● User Interface Design:
    ● The technology may also be leverged in the future to enable controlling household
    appliances via gestures, and non-invasive monitoring of children and elderly.
    ● Entertainment:
    ● It enables a new dimension for input-output devices in gaming which does not
    suffer from occlusion and works in non-line-of-sight.
    Future Scope:

    ●
    Wi-Vi technology has just been introduced.
    ● It is an emerging technology with a wide range of
    applications.
    ● In the possible future we would be able to see through
    solid materials by using smart phones.
    ● Evolution of seeing humans through denser building
    material and with a longer range.
    ● High quality images.
    Conclusion:

    ●  The possibilities are numerous and can be explored further. 


    ● If this technology can be put into practical use, It can be used
    in a variety of applications.
    ● We will proceed toward the cleaner, greener, safer and
    brighter future.
    ● Wi-Vi technology can change our world before we realize it.
    THANK YOU

    D. Jignas

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