High speed VLC system based on turbo-coded OFDM scheme

Today, the improved wireless communication technique for increasing demand for the next generation communication system is developed variously to transmit a long distance and high data. Visible light communication (VLC) system uses radiated light of LEDs. However, VLC have weak points which deteriorate performance of communication. Because there is multi-path fading that occurs propagation delay by interior walls or other things in indoor environments. In this paper, we propose both turbo codes to mitigate interference at the transmitter and orthogonal frequency multiplexing (OFDM) to provide high speed data transmission. The encoding and decoding of the proposed system are described and simulation results are analyzed.