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A Study on LiFi Wireless Visible Light Communication
M. Sowmiya,  G.Visali
Li-Fi Light Fidelity– IEEE 802.15 Standard is high-speed, bidirectional, networked and mobile wireless communications using light. This technology is wireless and uses visible light or infra-red and near ultraviolet (instead of radio frequency waves) spectrum for communication. This form of Visible light communication (VLC) and optical wireless communications (OWC) helps in replacement of data broadcasting. It is measured to be about 100 times faster than Wi-Fi, reaching speeds of 224 gigabits per second. The Visible Light Communication (VLC) is the best solution to overcome the problems faced in RF system like bandwidth, availability, health, security. VLC uses visible light region of electromagnetic spectrum, which is 10000 times broader than RF region. Like Wi-Fi VLC has Light Fidelity (Li-Fi) which uses light as source. The VLC works by modulating the intensity of light from LED array which is detected by photo detector (PD) and then demodulated to electronic signal. Li-Fi is now part of Visible Light Communications (VLC) PAN IEEE 802.15.7 standard. VLC signals work by switching bulbs on and off within nanoseconds which is too quick to be noticed by a human eye. More sophisticated techniques could dramatically increase VLC data rate. Li-Fi is an emerging technology that could see specialized LED (Light Emitting Diode) light bulbs providing low-cost wireless internet connectivity almost everywhere.
Keywords- LED (Light Emitting Diode), VLC (Visible Light Communication), OWC (Optical wireless communications), Li-Fi, Wi-Fi.
Unique Identification Number - IJEDR1601019Page Number(s) - 116-119Pubished in - Volume 4 | Issue 1 | January 2016DOI (Digital Object Identifier) -    Publisher - IJEDR (ISSN - 2321-9939)
Cite this Article
M. Sowmiya,  G.Visali,   "A Study on LiFi Wireless Visible Light Communication"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.4, Issue 1, pp.116-119, January 2016, Available at :http://www.ijedr.org/papers/IJEDR1601019.pdf