British researchers claim that they have achieved data transmission speeds of up to 10Gb / s through Li-Fi technology, a technology that uses LED bulbs for data transmission.
Li-Fi technology data transmission speed up to 10Gb / s
The researchers used miniature LED bulbs to achieve a 3.5Gb / s data transmission speed through any of the three primary colors that make up white light—red, green, and blue—of which. This means that it is possible to achieve data transmission speeds in excess of 10Gb / s. Li-Fi is an emerging technology that allows special LED light bulbs to provide low-cost wireless network connectivity almost anywhere.
Ultra high speed
The research project is called "Super Parallel Visible Light Communication Engineering". It is a joint project carried out by the University of Edinburgh, St Andrews University, Strathclyde University, Oxford University and Cambridge University. Funded.
Mini LED bulbs, developed by the University of Strathclyde, allow light to be emitted in parallel, thereby increasing the amount of data transmitted at any time. "Imagine a shower head splitting water into parallel streams. This is what we do with light," said Harald Haas, a professor of optical fiber wireless communications at the University of Edinburgh and one of the project leaders.
Using digital modulation technology called "Orthogonal Frequency Division Multiplexing", the researchers can make the brightness of the micro LED bulb change millions of times per second, which is like an extremely fast switch. This allows large amounts of binary data—that is, a series of data consisting of 0s and 1s—to spread at high speed.
Earlier this year, the German Fraunhofer Heinrich Hertz Institute declared that under laboratory conditions, data transmission speeds of up to 1Gb / s are possible. This month, Chinese scientists have developed a microchip LED bulb that can achieve a data transmission speed of 150 Mb / s. One such light bulb can provide network connection for four computers.
Li-Fi technology
In 2011, Professor Haas demonstrated how an LED light bulb with signal processing technology can transmit high-definition video to a computer. He invented the term Li-Fi, and founded a private company PureVLC to use this technology (also known as visible light communication technology, referred to as VLC technology).
Since LED bulbs are very popular and lighting infrastructure is in place, Li-Fi technology is expected to be cheaper and more energy-efficient than existing radio communication systems.
Visible light is a part of the electromagnetic spectrum, which is 10,000 times larger than the radio spectrum, and can relatively have unlimited capacity. Professor Haas said that another advantage is that evenly distributed LED transmitters can provide a more stable and regional Internet connection for the entire building. The disadvantage of traditional Wi-Fi is that the farther you are from it, the weaker the signal you get, resulting in unstable wireless network connections in offices and homes.
Professor Haas also believes that because light cannot pass through walls, VLC technology may be more secure than traditional Wi-Fi connections.
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