Performance Analysis of Dimming Methods in Visible Light Communication Systems

The Visible Light Communication (VLC) has been taken very attentions from many researchers due to its efficiency substructure. In specially, the VLC systems provide both lighting and data transmission at same time. This paper investigated performance analyses of modulation schemes which support brightness control for Communication. this sense, it focused on differences between M-ary VPPM (M-ary Variable Pulse Position Modulation) scheme VPAPM (Variable Amplitude was proposed ensure multilevel scheme. particular, a comparison given techniques with respect Bit Error Rate by considering bit length consisted in symbol. is modified generating signals two power levels. Moreover, based-transmission model assure accurate dimming target values under condition long runs bits (1 s or 0 s) that encode signal amplitude. However, system lower rate when compare traditional VPAPM. receiver suggested decode received signals. demodulator architecture observed terms BER versus distance transmitter.