Download - Light fidelity (li fi) final ppt
![Page 1: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/1.jpg)
LIGHT FIDELITY (LI-FI)BY SAI CHARAN TEJA
![Page 2: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/2.jpg)
• Present Usage of Communication
• Electromagnetic spectrum
• What is Li-Fi?
• History
• Working principle
• Applications
• Limitations
• Conclusion
Contents:
![Page 3: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/3.jpg)
• The Need of wireless data has been increasing day by day in this modern world.
• The major source used for wireless transmission is Radio frequency.
Present usage of communication:
1.4 Million Base
Stations
5 Billion
![Page 4: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/4.jpg)
ELECTRO MAGNETIC SPECTRUM
![Page 5: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/5.jpg)
Radio Frequency-Issues
Availability
Security
Capacity
Efficiency
![Page 6: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/6.jpg)
What is Li-Fi?
• Li-Fi, or light fidelity, is 5G visible light communication systems using light from light-emitting diodes(LEDs) as a medium to deliver networked, mobile, high-speed communication in a similar manner as Wi-Fi and Optical fiber.
• Visible light communications (VLC) signals work by switching bulbs on and off within nanoseconds , which is too quick to be noticed by the human eye.
![Page 7: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/7.jpg)
History:
• Professor Harald Haas, from the University of Edinburgh in the UK, is widely recognized as the original founder of Li-Fi
• Research has been going on in all the developed countries from 1990, but Dr. Harald has stunned the world when he presented on Li-Fi during Global Ted talk 2011.
![Page 8: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/8.jpg)
![Page 9: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/9.jpg)
![Page 10: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/10.jpg)
TYPICAL LI-FI ENVIRONMENT
![Page 11: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/11.jpg)
![Page 12: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/12.jpg)
![Page 13: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/13.jpg)
STREET LIGHTSCENARIOS
![Page 14: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/14.jpg)
UNDER WATER
SCENARIOS
![Page 15: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/15.jpg)
AEROPLANE SCENARIOS
![Page 16: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/16.jpg)
In RF restricted
environments
![Page 17: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/17.jpg)
LIMITATIONS & CHALLENGES
• Interferences from external light sources like sun light, normal bulbs, and opaque materials in the path of transmission will cause interruption in the communication.
• Li-Fi requires line of sight.
• High installation cost of the VLC systems.
• A major challenge facing Li-Fi is how the receiving device will transmit back to transmitter.
![Page 18: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/18.jpg)
CONCLUSION
BROWSE DATA WITH SPEED OF LIGHT
![Page 19: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/19.jpg)
![Page 20: Light fidelity (li fi) final ppt](https://reader031.vdocuments.site/reader031/viewer/2022021500/58ef39841a28ab050e8b45a7/html5/thumbnails/20.jpg)