Using Control Signals to Obtain Synchronization of Transmitters in Indoor VLC systems

The target of this work is to reduce the effect of multipath propagation in indoor visible light communication (VLC) systems. This is accomplished by giving a control signal (CS) for each transmitter of the systems. The aim of this CS is to synchronize the transmitted data from transmitters. In addition, CSs are used to make the controller, which is used to manage the communication, knows all information about transmitters. This leads to eliminate the difference time propagation between transmitters and reduce the effect of multipath propagation. Results revel that using CSs leads to improve channel bandwidth and signal to noise ratio (SNR) when the system operates at high data rate of 1 Gb/s.