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[Author] Aohan LI(3hit)

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  • Improved Indoor Location Estimation Using Fluorescent Light Communication System with a Nine-Channel Receiver

    Xiaohan LIU  Hideo MAKINO  Kenichi MASE  

     
    PAPER

      Vol:
    E93-B No:11
      Page(s):
    2936-2944

    The need for efficient movement and precise location of robots in intelligent robot control systems within complex buildings is becoming increasingly important. This paper proposes an indoor positioning and communication platform using Fluorescent Light Communication (FLC) employing a newly developed nine-channel receiver, and discusses a new location estimation method using FLC, that involves a simulation model and coordinate calculation formulae. A series of experiments is performed. Distance errors of less than 25 cm are achieved. The enhanced FLC system yields benefits such as greater precision and ease of use.

  • Research of Practical Indoor Guidance Platform Using Fluorescent Light Communication

    Xiaohan LIU  Hideo MAKINO  Suguru KOBAYASHI  Yoshinobu MAEDA  

     
    PAPER

      Vol:
    E91-B No:11
      Page(s):
    3507-3515

    This article presents an indoor positioning and communication platform, using fluorescent lights. We set up a practical implementation of a VLC (Visible Light Communication) system in a University building. To finalize this work, it is important that we analyze the properties of the reception signal, especially the length of the data string that can be received at different walking speed. In this paper, we present a model and a series of formulae for analyzing the relationship between positioning signal availability and other important parameters, such as sensor angle, walking speed, data transmission rate, etc. We report a series of real-life experiments using VLC system and compare the results with those generated by the formula. The outcome is an improved design for determination of the reception area with more than 97% accurate signals, and an optimal transmission data length, and transmission rate.

  • A Localization Method Based on Partial Correlation Analysis for Dynamic Wireless Network Open Access

    Yuki HORIGUCHI  Yusuke ITO  Aohan LI  Mikio HASEGAWA  

     
    LETTER-Nonlinear Problems

      Pubricized:
    2021/09/08
      Vol:
    E105-A No:3
      Page(s):
    594-597

    Recent localization methods for wireless networks cannot be applied to dynamic networks with unknown topology. To solve this problem, we propose a localization method based on partial correlation analysis in this paper. We evaluate our proposed localization method in terms of accuracy, which shows that our proposed method can achieve high accuracy localization for dynamic networks with unknown topology.