Wi-VI TECHNOLOGY
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WI-VI (WirelessVision) is a technology invented at MIT that uses Wi-Fi signals to detect and track moving objects like humans behind walls. It was invented by Dina Katabi and her student Fadel Adib. The system uses a MIMO device with two transmitter antennas and one receiver antenna. It is able to eliminate static objects like walls using a MIMO nulling concept while still detecting moving objects. Potential applications include emergency response, rescue operations, and law enforcement by allowing detection of people in dangerous or obscured areas.
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Wi-Vi Technology - Seminar Presentation
Wireless vision is a device which operates wirelessly and captures the moving objects behind the wall. WiFi or Wireless Fidelity signals are information carriers between a transmitter and a receiver. Through Wireless Vision, WiFi can be extended to our senses thereby allowing visualizing moving objects through closed doors and walls. These signals are helpful in identifying the people number and their locations while they are in a closed room. It can also help in identifying gestures behind the wall and also it combines gestures to communicate the messages to the wireless receiver without carrying any transmitting device.
WIVI Technology
WIVI is based on the principle of RADAR and SONAR imaging which works on Doppler’s effect. RADAR is an Object detection system which uses waves to determine the range, altitude, direction or speed of objects.Depends on its own transmitting signal.
Wi Vi Technology
Seeing through walls using Wireless Vision Technology. Wi-Fi signals are typically information carriers between a transmitter
and a receiver. In this paper, we show that Wi-Fi can also
extend our senses, enabling us to see moving objects through walls and behind closed doors.
Recommended
Wi-Vi Technology - Seminar Presentation
Wireless vision is a device which operates wirelessly and captures the moving objects behind the wall. WiFi or Wireless Fidelity signals are information carriers between a transmitter and a receiver. Through Wireless Vision, WiFi can be extended to our senses thereby allowing visualizing moving objects through closed doors and walls. These signals are helpful in identifying the people number and their locations while they are in a closed room. It can also help in identifying gestures behind the wall and also it combines gestures to communicate the messages to the wireless receiver without carrying any transmitting device.
WIVI Technology
WIVI is based on the principle of RADAR and SONAR imaging which works on Doppler’s effect. RADAR is an Object detection system which uses waves to determine the range, altitude, direction or speed of objects.Depends on its own transmitting signal.
Wi Vi Technology
Seeing through walls using Wireless Vision Technology. Wi-Fi signals are typically information carriers between a transmitter
and a receiver. In this paper, we show that Wi-Fi can also
extend our senses, enabling us to see moving objects through walls and behind closed doors.
Wi-Vi Technology
Presentation on Wireless Vision (Wi-Vi) Technology. Uses of Wi-Vi Technology. Advantages and Disadvantages of this technology. Its application.
Wi-Vi Technology
Wi-Vi is the latest trend in the modern technology. It is all set to revolutionize the technology we know today
Wi Vi technology
Want similar presentation ideas? Interact and follow me in Quora : https://www.quora.com/profile/Liju-Thomas-13 or
Connect with me through Facebook : http://www.facebook.com
/lijuthomas24
Researchers have always tried to build a device capable of seeing people through walls. However, previous efforts to develop such a system have involved the use of expensive and bulky radar technology that uses a part of the electromagnetic spectrum only available to the military. Now a system is being developed by Dina Katabi and Fadel Adib, could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. The device is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors. The system, called “Wi-Vi,” stands for "Wi-Fi" and "vision." is based on a concept similar to radar and sonar imaging. But in contrast to radar and sonar, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall.
Simple definition for Wi-Vi is, as a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the wall, or by other objects. Wi-Vi cancels out all these other reflections, and keeps only those from the moving human body. Previous work demonstrated that the subtle reflections of wireless inter signals bouncing off a human could be used to track that person's movements, but those previous experiments either required that a wireless router was already in the room of the person being tracked. Wi-Fi signals and recent advances in MIMO communications are used to build a device that can capture the motion of humans behind a wall and in closed rooms. Law enforcement personnel can use the device to avoid walking into an ambush, and minimize casualties in standoffs and hostage situations. Emergency responders can use it to see through rubble and collapsed structures. Ordinary users can leverage the device for gaming, intrusion detection, privacy-enhanced monitoring of children and elderly, or personal security when stepping into dark alleys and unknown places.
The concept underlying seeing through opaque obstacles is similar to radar and sonar imaging. Specifically, when faced with a non-metallic wall, a fraction of the RF signal would traverse the wall, reflect off objects and humans, and come back imprinted with a signature of what is inside a closed room. By capturing these reflections, we can image objects behind a wall.
Wi-Vi is a see-through-wall technology that is low-bandwidth, low-power, compact, and accessible to non-military entities. Wi-Vi is a see-through-wall device that employs Wi-Fi signals in the 2.4 GHz ISM band.
Wi-Vi Technology
Wi-Vi or wireless vision is one of the most modern technologies which use wireless fidelity or Wi-Fi as the core principle. Basically, it deals with tracking and manipulation of Wi-Fi signals.
Wi-Vi is used to image the obstacles or solids behind any wall or obstructions. The most important advantage of this is it is completely wireless and no cables or wires are used. Hence it becomes more suitable for usage in mobile devices and other lightweight technologies. Wireless facility also allows it to use in armed force and other security agencies.
As we know that SOANR and RADAR uses the principle of transmission and reflected waves, the Wi-Vi which uses the same principle can be called as an adaptation of those. But it also posses several differences and simpler apparatus. We will see those modifications on the coming pages of the paper.
Wivi report
In this report one can find what can wivi do? how does it work?
challanges faced in making wivi and so on........
Wireless Vision (Wi-vi)- attractive slides by Nirmal Ram
hi,i'm nirmal . here i present you the pictorial representation of my work .a brief description about wi vi without any contents. with pictures i can make you understand things . for more follow me on linked in .
Wireless Fidelity ppt
Wireless Technology is an alternative to wired Technology, which is commonly devices in wireless mode
Wireless Fidelity (WiFi)
Wi-Fi (Wireless Fidelity) is a generic term owned by "WiFi Alliance" which refers to any Wireless Local Area Networks (WLANs) based on IEEE 802.11 standard.
This presentation is prepared as reference of "E-Commerce Infrastructure" for BBA 6th Semester Students of Prime College. Document includes general introduction of WiFi Technology, WiFi Specification, advantages of WiFi and so on. Resources from various portals and slides from other authors has been used as reference.
Li fi(led transmission of data) presentation
LIFI –”LIGHT FIDEALITY” is transmission of data through illumination, i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow. Li-Fi is a light based Wi-Fi it uses light instead of radio waves to transmit information.
HISTORY - The technology truly began during the year 1990’s in countries like Germany , Korea and Japan where they discovered LED’s could be retrofitted to send information . Prof. Harald Hass from university of Edinburgh. continues to wow the world with the potential to use light for communication He demonstrated in year 2012.
5. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission
WiVi Technology
This Technolgy can scan the objects that are behind the wall. This can detect humans as wellas other obejcts which can't beseen through eyes.
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Wi-Vi Technology
Presentation on Wireless Vision (Wi-Vi) Technology. Uses of Wi-Vi Technology. Advantages and Disadvantages of this technology. Its application.
Wi-Vi Technology
Wi-Vi is the latest trend in the modern technology. It is all set to revolutionize the technology we know today
Wi Vi technology
Want similar presentation ideas? Interact and follow me in Quora : https://www.quora.com/profile/Liju-Thomas-13 or
Connect with me through Facebook : http://www.facebook.com
/lijuthomas24
Researchers have always tried to build a device capable of seeing people through walls. However, previous efforts to develop such a system have involved the use of expensive and bulky radar technology that uses a part of the electromagnetic spectrum only available to the military. Now a system is being developed by Dina Katabi and Fadel Adib, could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. The device is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors. The system, called “Wi-Vi,” stands for "Wi-Fi" and "vision." is based on a concept similar to radar and sonar imaging. But in contrast to radar and sonar, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall.
Simple definition for Wi-Vi is, as a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the wall, or by other objects. Wi-Vi cancels out all these other reflections, and keeps only those from the moving human body. Previous work demonstrated that the subtle reflections of wireless inter signals bouncing off a human could be used to track that person's movements, but those previous experiments either required that a wireless router was already in the room of the person being tracked. Wi-Fi signals and recent advances in MIMO communications are used to build a device that can capture the motion of humans behind a wall and in closed rooms. Law enforcement personnel can use the device to avoid walking into an ambush, and minimize casualties in standoffs and hostage situations. Emergency responders can use it to see through rubble and collapsed structures. Ordinary users can leverage the device for gaming, intrusion detection, privacy-enhanced monitoring of children and elderly, or personal security when stepping into dark alleys and unknown places.
The concept underlying seeing through opaque obstacles is similar to radar and sonar imaging. Specifically, when faced with a non-metallic wall, a fraction of the RF signal would traverse the wall, reflect off objects and humans, and come back imprinted with a signature of what is inside a closed room. By capturing these reflections, we can image objects behind a wall.
Wi-Vi is a see-through-wall technology that is low-bandwidth, low-power, compact, and accessible to non-military entities. Wi-Vi is a see-through-wall device that employs Wi-Fi signals in the 2.4 GHz ISM band.
Wi-Vi Technology
Wi-Vi or wireless vision is one of the most modern technologies which use wireless fidelity or Wi-Fi as the core principle. Basically, it deals with tracking and manipulation of Wi-Fi signals.
Wi-Vi is used to image the obstacles or solids behind any wall or obstructions. The most important advantage of this is it is completely wireless and no cables or wires are used. Hence it becomes more suitable for usage in mobile devices and other lightweight technologies. Wireless facility also allows it to use in armed force and other security agencies.
As we know that SOANR and RADAR uses the principle of transmission and reflected waves, the Wi-Vi which uses the same principle can be called as an adaptation of those. But it also posses several differences and simpler apparatus. We will see those modifications on the coming pages of the paper.
Wivi report
In this report one can find what can wivi do? how does it work?
challanges faced in making wivi and so on........
Wireless Vision (Wi-vi)- attractive slides by Nirmal Ram
hi,i'm nirmal . here i present you the pictorial representation of my work .a brief description about wi vi without any contents. with pictures i can make you understand things . for more follow me on linked in .
Wireless Fidelity ppt
Wireless Technology is an alternative to wired Technology, which is commonly devices in wireless mode
Wireless Fidelity (WiFi)
Wi-Fi (Wireless Fidelity) is a generic term owned by "WiFi Alliance" which refers to any Wireless Local Area Networks (WLANs) based on IEEE 802.11 standard.
This presentation is prepared as reference of "E-Commerce Infrastructure" for BBA 6th Semester Students of Prime College. Document includes general introduction of WiFi Technology, WiFi Specification, advantages of WiFi and so on. Resources from various portals and slides from other authors has been used as reference.
Li fi(led transmission of data) presentation
LIFI –”LIGHT FIDEALITY” is transmission of data through illumination, i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow. Li-Fi is a light based Wi-Fi it uses light instead of radio waves to transmit information.
HISTORY - The technology truly began during the year 1990’s in countries like Germany , Korea and Japan where they discovered LED’s could be retrofitted to send information . Prof. Harald Hass from university of Edinburgh. continues to wow the world with the potential to use light for communication He demonstrated in year 2012.
5. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission
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Wi-Fi signals are typically information carriers between a transmitter and receiver. Through this paper, we are trying to extend our senses so as to see the moving object through the walls and closed doors, under this technology communication is possible by a combination of gestures and by messaging without even using any transmitter. In this paper to innovations are being introduced: (1) Use of MIMO interfacing to nullify the effect of a static object and focusing the receiver on a moving target (2) motion of a human body is treated as an antenna and resulting RF beam is tracked. To exemplify, someone walking outdoors at night who thought they were being followed might use it to detect a person behind a fence or around a corner. The key benefits of Wi-Vi over current ways of seeing through walls, such as radar and sonar, are cost, power, and size. At the heart of the technology is its encoding scheme, which can be implemented in silicon. Wi-Vi could be built into a cell phone soon and for not much more than the cost of a regular Wi-Fi module. Bringing wall-penetrating vision to handheld devices could open up a lot more uses for it.
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As we see in today's world, all institutes as well as organizations are planning to shrink the size hardware and are even trying to make it portable, olden days we had local area network wires to transmit data over devices then came in Wi-Fi which didn't have wires but was able to transmit data over devices but its sources are usually wired an sometimes not portable to every place and then now industries are planning to implement li-fi which uses a simple light to transmit data over devices users will just have to carry a small light source which will transmit the data over devices but what about the security measures to be taken that needs to be considered. This paper analysis and defines measures for those security issues faced in Li-fi technology. [1] Jason John D'souza | Seeza Franklin"Li-Fi Security Issues and its Measures" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: http://www.ijtsrd.com/papers/ijtsrd15706.pdf http://www.ijtsrd.com/computer-science/computer-security/15706/li-fi-security-issues-and-its-measures/jason-john-dsouza
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zkStudyClub - Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex Proofs
This paper presents Reef, a system for generating publicly verifiable succinct non-interactive zero-knowledge proofs that a committed document matches or does not match a regular expression. We describe applications such as proving the strength of passwords, the provenance of email despite redactions, the validity of oblivious DNS queries, and the existence of mutations in DNA. Reef supports the Perl Compatible Regular Expression syntax, including wildcards, alternation, ranges, capture groups, Kleene star, negations, and lookarounds. Reef introduces a new type of automata, Skipping Alternating Finite Automata (SAFA), that skips irrelevant parts of a document when producing proofs without undermining soundness, and instantiates SAFA with a lookup argument. Our experimental evaluation confirms that Reef can generate proofs for documents with 32M characters; the proofs are small and cheap to verify (under a second).
Paper: https://eprint.iacr.org/2023/1886
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Wi-VI TECHNOLOGY
- 2. Contents History Introduction Basic Idea Challenges faced in designing WI-VI Flash Effect Tracking Human Movement MIMO NULLING method How it Works Tracking Moving object Advantage And Limitation Applications
- 3. History This Research is invented at MIT's Computer Science and Artificial Intelligence Laboratory. Dina Katabi , a professor in MIT’s Department of Electrical Engineering and Computer Science, and her graduate student Fadel Adib invented this technology.
- 4. Introduction toWI-VI WI-VI stands for WIFI-VISION Wireless Device Capture moving objects behind the walls Use Wi-Fi signals in ISM band(2.4 GHz) Requires a Wi-Fi Hardware 3 Antenna MIMO device(Two Transmitter antenna and one receiver antenna)
- 5. BASIC IDEA Wi-Vi Device wall Moving object Transmitted signal reflected signal
- 6. Challenge Faced inWI-VI Flash Effect
- 8. MIMO NULLING CONCEPT To Eliminate the FLASH EFFECT we use MIMO NULLING CONCEPT h2 h1 px X Y=h1x+ph2x Static objects(Walls , chair etc.) P=-h1/h2 Y=h1x+(-h1/h2)h2x=ZERO Moving Objects Y=h1x+ph2x=NOT ZERO
- 9. HowTechnology work ROUTER 1 ROUTER2 MOVING OBJECT RECEIVER
- 10. WIVI SETUP
- 12. Advantages Wi-Vi is relatively a low-power, low-cost, low-bandwidth, and low-size Wi-Vi requires only few MHz of bandwidth and operates in the same range as Wi-Fi. It operates in ISM band. It allowing us to detect objects in the dark or in smoke. Accurate detection and good accuracy
- 13. Limitations We cannot detect the human if concrete walls thicker than 8". It has low resolution.
- 16. Law Enforcement
- 17. FUTURE SCOPE Wi-vi could be built into a smartphones or a special handheld device. Evolution of seeing humans through denser building material and with a longer range.
- 18. References Fadel adib and Dina katabi, see through walls with wi-fi, ACM SIGCOMM’13 hongkong august 2013. Seeing through walls"- MIT's Lincoln Laboratory, http://www.youtube. com/watch?v=H5xmo7iJ7KA. www.people.csail.mit.edu/fadel/wivi Wi-Vi system uses Wi-Fi to see through walls Gizmag