SYSTEM FOR VISIBLE LIGHT COMMUNICATIONS WITH MULTI-CARRIER MODULATION AND METHOD THEREOF

摘要

PURPOSE: A visible light wireless communication system by using multi carrier and a method thereof are provided to use multi carrier technique capable of higher order modulation, thereby overcoming the limit of the transmission speed on existing strength modulation method in a VLC(Visible Light Communications). CONSTITUTION: A modulator unit(110) performs the symbol-mapping of transmission data. The modulator unit modulates symbols into parallel data. The modulator unit performs IFFT(Inverse Fast Fourier Transform) of the modulated data. The modulator unit divides the IFFT result value into the real number data and imaginary number data. A DAC(Digital Analog Converter) unit(130) respectively converts the real number data and imaginary number data into analog signal. A transmitting unit(150) transmits the converted real number data and imaginary number data by the visible ray.