In addition to the achievements made by a group of Chinese researchers in developing a Li-Fi system that can generate data at 150Mbps, another team of scientists from the UK, on Monday (October 28), announced that they were able to transmit data at 10Gbps using micro-LEDs.
The British scientists achieved this feat by simultaneously sending 3.5Gbps streams of data through each of the three primary colours --- red, green and blue—that make up white light. The work was part of an initiative known as the “ultra-parallel visible light communication project” that involves the use of parallel beams of light from very tiny bulbs to transmit data at high speed.
Light Fidelity, in general, employs a technique called Orthogonal Frequency Divisional Multiplexing in which a signal is split into several narrowband channels at frequencies (and in the case of an LED bulb, splits light into millions of alterations in light intensity per second). Hence, it switches the bulb on and off at an ultra-fast rate (not noticeable by the human eye), thereby transmitting large amounts of binary data at very high speeds.
Source: Before It’s News, SearchNetworking.
#Light Fidelity. #Orthogonal Frequency-Division Multiplexing. #ultra-parallel visible light communication.
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