TRANSMISSION DEVICE AND METHOD, AND RECEPTION DEVICE AND METHOD IN OPTICAL WIRELESS COMMUNICATION SYSTEM

摘要

A transmission device, according to one embodiment of the present invention, comprises: a plurality of modulators for generating modulation signals by modulating source signals; a mapper for transmitting a source signal, indicating a symbol mapped to a bitstream, to a modulator corresponding to a subcarrier index mapped to the bitstream among the plurality of modulators, by referring to a mapping table; a bias unit for applying a DC bias such that a modulation signal has a positive value; and an optical transmitter for outputting an optical signal according to the modulation signal having a positive value.