This brilliant idea was first showcased by Harald Haas From University of Edinburgh, UK, in his TED Global talks on VLC. LI-FI is transmission of data through illumination by taking the fiber out of fiber optics by sending data through an LED light bulb that varies in intensity faster than the human eye can follow. He explained, “Very simple, if the LED is on, you transmit a digital 1, if it is off you transmit a 0.
The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data.” So what you require at all some LEDs and a controller that code data into those LEDs. We have to just vary the rate at which the LED’s flicker depending upon the data we want to encode. Further Enhancements can be made in this method like using an array of LEDs for parallel data transmission or using mixtures of red, green and blue LEDs to alter the light’s frequency with each frequency encoding a different data channel. Such advancements promise a theoretical speed of 10 Gbps – meaning you can download a full high definition film in just 30 seconds.
Since Li-Fi uses just the light, it can be used safely in aircrafts and hospitals that are prone to interference from radio waves. This can even work underwater where Wi-Fi fails completely, thereby throwing open endless opportunities for military operations.It was demonstrated that table lamp that successfully transmit data at speed exceeding 10 Mbps using light waves from LED light to a computer located below the lamp.
The LED bulb will hold a microchip that will do the job of processing the data. The light intensity can be manipulated to send data by tiny changes in amplitude. This technology uses visible spectrum of light, a part of the electromagnetic spectrum that is still not greatly utilized. In fact the technology transfers thousands of streams of data simultaneously, in parallel, in higher speed with the help of special modulation using unique signal processing technology.
Since Li-Fi uses just the light, it can be used safely in aircrafts and hospitals that are prone to interference from radio waves. This can even work underwater where Wi-Fi fails completely, thereby throwing open endless opportunities for military operations.It was demonstrated that table lamp that successfully transmit data at speed exceeding 10 Mbps using light waves from LED light to a computer located below the lamp.
The LED bulb will hold a microchip that will do the job of processing the data. The light intensity can be manipulated to send data by tiny changes in amplitude. This technology uses visible spectrum of light, a part of the electromagnetic spectrum that is still not greatly utilized. In fact the technology transfers thousands of streams of data simultaneously, in parallel, in higher speed with the help of special modulation using unique signal processing technology.
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