Hokkaido University Research Profiles

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visible light communication: 1

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  • High-precision Acoustic Position Recognition, Time Synchronization, Selective Flickerless Visible Light Communication

    Submillimeter-order position measurement and its deployment

    By integrating ranging technology that is more accurate than conventional methods by double digits and original time-synchronization technology using illumination, we can quickly and accurately estimate the 3D position and velocity of mobile terminals and robots. The system also realizes selective flickerless visible light communication and position-dependent information distribution to specific moving objects.

    Research

    To accurately obtain the position of a user in a room or a moving object in real time, we have proposed a high-precision time reference point setting method called the phase-matching method (ranging error of 0.03 mm). Based on this technology, we have developed a smartphone users’ gesture recognition system and a robot tracking system. We have also achieved microsecond-order time synchronization using a camera-equipped mobile terminal and an original algorithm. The integration of LED modulation and terminal location information will allow us to distribute location-dependent information and conduct flickerless visible light communication using indoor lighting.

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    Masanori Sugimoto Professor
    Faculty of Information Science and Technology
    Hokkaido University Researcher Directory

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