Overlapping PPM scheme with adjustable parameters for visible light communication systems

The light emitted diode (LED) technology can be used for both data transmission and lighting in Visible Light Communication (VLC) systems. This work presents a new modulator architecture for Overlapping Pulse Position Modulation (OPPM) to provide data transmission by using LEDs. The parameter of OPPM can be changed in modulation process hence the OPPM scheme has an adjustable structure. Additionally, the proposed scheme is implemented on Field Programmable Gate Arrays (FPGA) board. The accuracy of the proposed architecture is shown by observing experimental and simulation results.