Pulse width modulated visible light communication using digital micro-mirror device projector for voice information guidance system

Motoi Kodama, Shinichiro Haruyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Visible light communication (VLC) is producing many useful and unique applications using the light emitting diode lights as transmitters. In the VLC, there are two major receiver types; a photodiode detector and an image sensor. The photodiode is simple and has high response time but is limited to a short distance communication. On the other hands, the image sensor has high spatial resolution, but its low frame rate and heavy image processing task are obstacles to realize a high speed and spatial-modulated VLC. In our previous works, as one of the solutions, we experimentally showed that a digital micro-mirror device (DMD) projector as a transmitter could be used as a fine-grained VLC position detection illumination system with millimeter accuracy using the receiver with Raspberry Pi to demodulate the signals. In this paper, we propose the pulse width modulated VLC (PWM-VLC) using the DMD projector for the voice information guidance system to realize the VLC without a microcomputer, and report its fundamental experiments. Our proposed system uses very simple receiver consisting of analog electric circuits driven by dry batteries for amplification and digital-to-analog conversion, so it does not need a complicated signal processing process with the microcomputer. The experiments showed that the system can transmit four different waves which are sine, square, triangular and sawtooth waves to each different direction at the same time using the PWM-VLC technique. In the future, if a higher-speed DMD projector is available, it will allow users to receive the voice information guidance depending on their position precisely using the simple receiver and the DMD projector.

Original languageEnglish
Title of host publication2019 IEEE 9th Annual Computing and Communication Workshop and Conference, CCWC 2019
EditorsSatyajit Chakrabarti, Himadri Nath Saha
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages793-799
Number of pages7
ISBN (Electronic)9781728105543
DOIs
Publication statusPublished - 2019 Mar 12
Event9th IEEE Annual Computing and Communication Workshop and Conference, CCWC 2019 - Las Vegas, United States
Duration: 2019 Jan 72019 Jan 9

Publication series

Name2019 IEEE 9th Annual Computing and Communication Workshop and Conference, CCWC 2019

Conference

Conference9th IEEE Annual Computing and Communication Workshop and Conference, CCWC 2019
CountryUnited States
CityLas Vegas
Period19/1/719/1/9

Keywords

  • Digital Micro-mirror Device (DMD)
  • Indoor location services
  • Optical Wireless Communication (OWC); Visible Light Communication (VLC)
  • Projector Visible Light Communication (PVLC)
  • Pulse Width Modulation (PWM)
  • Voice information guidance system

ASJC Scopus subject areas

  • Computer Networks and Communications

Fingerprint Dive into the research topics of 'Pulse width modulated visible light communication using digital micro-mirror device projector for voice information guidance system'. Together they form a unique fingerprint.

  • Cite this

    Kodama, M., & Haruyama, S. (2019). Pulse width modulated visible light communication using digital micro-mirror device projector for voice information guidance system. In S. Chakrabarti, & H. N. Saha (Eds.), 2019 IEEE 9th Annual Computing and Communication Workshop and Conference, CCWC 2019 (pp. 793-799). [8666577] (2019 IEEE 9th Annual Computing and Communication Workshop and Conference, CCWC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CCWC.2019.8666577