Visible light communication and indoor positioning using a-SiCH device as receiver

M. A. Vieira, M. Vieira, P. Louro, P. Vieira, A. Fantoni

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

Abstract

An indoor positioning system were trichromatic white LEDs are used both for illumination proposes and as transmitters and an optical processor, based on a-SiC:H technology, as mobile receiver is presented. OOK modulation scheme is used, and it provides a good trade-off between system performance and implementation complexity. The relationship between the transmitted data and the received digital output levels is decoded. The system topology for positioning is a self-positioning system in which the measuring unit is mobile. This unit receives the signals of several transmitters in known locations, and has the capability to compute its location based on the measured signals. LED bulbs work as transmitters, sending information together with different IDs related to their physical locations. A triangular topology for the unit cell is analysed. A 2D localization design, demonstrated by a prototype implementation is presented. Fine-grained indoor localization is tested. The received signal is used in coded multiplexing techniques for supporting communications and navigation concomitantly on the same channel. The position is estimated through the visible multilateration metodh using several non-collinear transmitters. The location and motion information is found by mapping position and estimates the location areas. Data analysis showed that by using a pinpin double photodiode based on a a-SiC:H heterostucture as receiver, and RBGLEDs as transmitters it is possible not only to determine the mobile target's position but also to infer the motion direction over time, along with the received information in each position.

Original languageEnglish
Title of host publicationThird International Conference on Applications of Optics and Photonics
PublisherSpie -- the Int Soc for Optical Engineering
Volume10453
ISBN (Electronic)9781510613836
DOIs
Publication statusPublished - 2017
Event3rd Triennial International Conference on Applications of Optics and Photonics - Faro, Portugal
Duration: 8 May 201712 May 2017

Conference

Conference3rd Triennial International Conference on Applications of Optics and Photonics
CountryPortugal
CityFaro
Period8/05/1712/05/17

Keywords

  • A-SiC: H technology
  • Demultiplexer
  • Indoor positioning
  • Optical sensor
  • Receiver
  • Transmitter
  • WDM

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  • Cite this

    Vieira, M. A., Vieira, M., Louro, P., Vieira, P., & Fantoni, A. (2017). Visible light communication and indoor positioning using a-SiCH device as receiver. In Third International Conference on Applications of Optics and Photonics (Vol. 10453). [104530A] Spie -- the Int Soc for Optical Engineering. https://doi.org/10.1117/12.2271362