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2018-06 LiFi – How does LiFi work

LiFi, short for light fidelity, is a Visible Light Communications (VLC) system that relies on the visible light spectrum to provide wireless Internet connectivity.  Li-Fi can operate using off-the-shelf LED lights that are connected to transceiver access points. The LED lights transfer binary bits and bytes of data by intermittently flashing lights on and off. They’re essentially strobe lights, but at a rate of 15 million times per second, the rapid flickering remains invisible to the human eye. The LED lights operate as transceivers and transmit data to mobile client devices that rely on a LiFi receiver that demodulates the signal to read data. However, because it is a bi-directional technology, the receiver can also act as a transceiver.

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