Fundamental analysis for visible-light communication system using LED lights

TLDR

White LEDs provide high brightness, reliability, low power consumption, long lifetime, and are expected to be key lighting sources in future generations, with multiple units commonly installed in rooms. The paper investigates how interference and reflection affect the performance of a white‑LED visible‑light communication system. The system uses white LEDs for both illumination and optical wireless communication, requiring consideration of optical path differences among multiple LEDs. Numerical analyses demonstrate that the proposed indoor visible‑light communication system using white LEDs is a promising next‑generation solution.

Abstract

White LED offers advantageous properties such as high brightness, reliability, lower power consumption and long lifetime. White LEDs are expected to serve in the next generation of lamps. An indoor visible-light communication system utilizing white LED lights has been proposed from our laboratory. In the proposed system, these devices are used not only for illuminating rooms but also for an optical wireless communication system. Generally, plural lights are installed in our room. So, their optical path difference must be considered. In this paper, we discuss about the influence of interference and reflection. Based on numerical analyses, we show that the system is expected to be the indoor communication of the next generation.