Abstract
AbstractLight Fidelity, or Li-Fi, is a communication technology that uses light as its medium to deliver high-speed bidirectional communication that complies with the IEEE 802.15.7 standard. It works on the principle of data transmission through illumination by a Light-emitting diode (LED) bulb with greater intensity than even a human eye cannot follow. LED’s have a wide range of applications, and one such application is the ability to transmit data from one point to another in the form of light. Li-Fi technology is a derivative of optical wireless communication to provide connectivity within a network environment. This paper explains how Li-Fi scores more than WiFi. It describes the working principle of Li-Fi and briefly discusses the various modulation techniques used in Li-Fi technology for data transmission. This paper observes the relation between Bit error value and LED brightness level for distances between Transmitter (\( T_{x} \)) and Receiver (\( R_{x} \)). The effect of the threshold value of the photo-detector on the bit error rate for different levels of LED brightness is considered with the help of the On-off Keying (OOK) modulation technique.KeywordsLi-fi technologyLEDData transmissionModulation techniquesBer
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