• A. Hari Nagendra Kumar
• Tulasi Vemu

with the advent of the new technologies in wireless communication, the spectrum available in radio frequency is looming gradually. In electromagnetic spectrum, the visible light frequency is greater than ten thousand times of radio frequency. By using visible frequency, we can communicate data through light emitting diode (LED) as a transmitter and photo detector as a receiver. This has been proposed by a German physicist, Harald Hass which he coined the term as Light Fidelity (LiFi) or Data through illumination. LED has a great advantage it varies its intensity which cannot be human perceptible. LED is used as a medium carrier, on the receiving side the photo detector registers the illumination and converts into electrical energy and further it is converted into binary data to an original message. If the LED is on, the photo detector registers a digital one; otherwise it registers it as digital zero with the combination of clock synchronization and they are in same line of sight. So typically by using some modulation techniques we can use LEDs in wireless communications for transmission of data for safer and brighter future.

LED, LiFi, Photo detector, Visible Light Communication, Radio Waves, Spectrum

"Visible Light Communication through Light Emitting Diode in Bidirectional", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 6, page no.775-779, June-2018, Available :http://www.jetir.org/papers/JETIR1806357.pdf

"Visible Light Communication through Light Emitting Diode in Bidirectional", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 6, page no. pp775-779, June-2018, Available at : http://www.jetir.org/papers/JETIR1806357.pdf