LED-Assisted Three-Dimensional Indoor Positioning for Multiphotodiode Device Interfered by Multipath Reflections

Authors:
  • JXJindan Xu
    Jindan Xu
  • HSHong Shen
    Hong Shen
  • WXWei Xu
    Wei Xu
  • HZHua Zhang
    Hua Zhang
  • XYXiaohu You
    Xiaohu You

Abstract
Indoor positioning for visible light communication (VLC) has gained significant attentions recently with the popularity of light-emitting diodes (LEDs). In this paper, we consider a typical application of VLC by proposing a three-dimensional positioning scheme for a target terminal equipped with multiple photodiodes (PDs). Given the relative coordinates between the target terminal and receiving PDs along with positions of fixed transmitting LEDs, precise location estimation of the terminal device can be achieved via measuring received signal strength (RSS) through line-of-sight (LoS) channels. Moreover, multipath reflections from interior walls are considered as a major interference in non-LoS environment. It is discovered that the positioning error increases linearly with respect to the reflection coefficient of walls, which also verified by simulation results. The positioning error is achieved in millimeter scale under an ideal condition and in decimeter scale with multipath reflections.

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