Abstract — Future electric lights will be composed of white LEDs (Light Emitting Diodes). Indoor wireless optical communication
systems utilizing white LED lights have been proposed from our laboratory and we have been studying about it.
Generally, plural lights are installed. Therefore, their optical path difference must be considered. In this paper, the influence
of an optical path difference has been investigated and an optical OFDM (Orthogonal Frequency Division Multiplexing) has
been proposed. From the results of computer simulations, we have found that this approache is feasible for the wireless optical
communication systems utilizing white LED lights.