Abstract
Indoor visible light communications utilizing LED light that are available for not only the illumination but also data transmission are received interest for future home networks. The dimming control function which the illumination brightness can be controlled should not be compromised by the data transmission function. The bit error rate performance of the indoor visible light communications deteriorates by co-channel interference from neighboring LEDs. The Variable N-parallel Code-Shift-Keying (VN-CSK) system using the Modified Prime Sequence Codes (MPSC) has been proposed for indoor visible light communications. The VN-CSK system using MPSC has not only a suppression function for reducing co-channel interference from neighboring LEDs, but also a function for keeping constant data transmission efficiency regardless of dimming control. In this paper, the bit error rate performance of the VN-CSK system using MPSC is evaluated under the indoor visible light communication channel by theoretical analysis. As a result, under the indoor visible light communication channel, the VN-CSK system using MPSC can suppress the influence of co-channel interference by using the group characteristics of MPSC.
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