Li-Fi: The Brighter Way to Communicate

Globally, Wi-Fi has been used for years to access and transmit data. But more often than not, Wi-Fi and their modems have elicited unsavoury remarks when more users have logged on. 

 Li-Fi is now poised to transform for the better the scenario of data transfer and access.

What is Li-Fi???

  • Li-Fi is a bidirectional, high-speed, fully-networked wireless communications technology. 
  • In simple words, it can be considered a light-based Wi-Fi. Where radio waves are deployed to transmit data and information in Wi-Fi, Li-Fi uses light waves, which is faster and acts as a better tool for communication.
  • In Li-Fi, LED lamps fitted with transceivers can light a room and receive information too. 
  • Unlike Wi-Fi, which can hold limited access points only, Li-Fi can have multiple. 
  • Considered a Visible Light Communications (VLC) system that runs wireless communications at extremely high speeds, Li-Wi uses common household LED (light-emitting diode) bulbs to transfer data, ensuring speeds of up to 224 gigabits per second.

How Li-Fi is generated??

  1. A LED bulb is a semiconductor light source. 
  2. Consequently, the constant current of electricity supplied to a LED bulb can be dimmed and dipped up and down at very high speeds without being detected by the human eye. 
  3. For instance, data can be fed into a LED light bulb via signal-processing technology.
  4. Thereafter, this data is embedded in its beam and sent back at rapid speeds to the photo-detector or photodiode. 5. Miniscule changes in the LED bulb’s swift dimming are converted by the receiver into electrical signals. 
  5. Finally, the signal is reconverted into a binary data stream recognisable as web, video or audio applications running on Internet-enabled devices.

The spectrum of visible light is considered 10,000 times bigger than that of radio waves on the electromagnetic spectrum, which measures radiation frequency. Deploying light can avoid the expenses required for the limited range of radio waves.

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