High speed transmission of signal level for white light emitting diode (LED) as a transmitter device by using modified phase equalization

by: Maad M. Mijwil

Publication date: 2020-03-01

Usage: Attribution-ShareAlike 4.0 International

Topics: Equalization, Visible light communication, White light emitting diode

Collection: journals_contributions; journals

Language: English

Visible light communication (VLC) also known as "Li-Fi", uses standard
LEDs to transmit data such as information, images, music, and videos.
The first LED was developed in 1927 by Oleg Vladimírovich Lósev (1903-
1942), however it was not used in the industry until the 1960s. In this paper,
will describe the implementation of Modified Phase Equalization (MPH) on
visible white LED lamps signal because it's has slow transition time that
severely limits in the communication system data speeds with phase
equalization that increases the bandwidth of the LED modulation. Employ
two filters with Modified Phase Equalization: first, Complementary (C) filter
to combine between all kinds moving signals and second, finite impulse
response (FIR) filter to obtain all coefficients that respective. Implementation
in two phases: first, frequency 150KHz with number of signals 15000 signals
and second, doubling frequency 300KHz with number of signals 30000
signals of LEDs without losing their main functionality as illumination
sources.