Visible Light Communication Receiver, Visible Light Communication System, and Visible Light Communication Method

A visible light communication system comprising:

• a transmitter including a modulator configured to encode a transmission data according to a DC-free RLL code having a minimum run of 1 and NRZI-modulate the transmission data encoded according to the DC-free RLL code, a driving current generator configured to generate a driving current signal by adding a rising pulse and a falling pulse to a rising edge and a falling edge of the transmission data modulated by the modulator, respectively, and a blue light-excited white LED driven by the driving current signal;
• and
• a receiver including a receiving unit configured to receive a visible light signal from the blue light-excited white LED, a photoelectric converter configured to convert the visible light signal received by the receiving unit into an electrical signal, an equalizer configured to equalize the electrical signal generated by the photoelectric converter to a duobinary signal, a discriminator configured to discriminate the duobinary signal outputted by the equalizer to generate a 3-value signal, a maximum-likelihood decoder configured to ML-decode the 3-value signal generated by the discriminator to output a decoded signal and a decoder configured to RLL decode the decoded signal outputted by the maximum-likelihood decoder.