875-Mb/s asynchronous bi-directional 64QAM-OFDM SCM-WDM transmission over RGB-LED-based visible light communication system

We experimentally demonstrated a 575-Mb/s downstream and 300-Mb/s upstream bi-directional SCM-WDM visible light communication system based on RGB-LED. BERs in all channels are under pre-FEC limit of 3.8×10-3 after 66-cm free-space transmission.