Coding schemes in a communication system based on visible-light communication

Paula Louro, M. Vieira, M. A. Vieira

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

Abstract

White LEDS revolutionized the field of illumination technology mainly due to the energy saving effects. Besides lighting purposes LEDs can also be used in wireless communication systems when integrated in Visible Light Communication (VLC) systems. Indoor positioning for navigation in large buildings is currently under research in order to overcome the difficulties associated with the use of GPS in such environments. The motivation for this application is also supported by the possibility of taking advantage of an existing lighting and WiFi infrastructure. In this work it is proposed a bidirectional communication system between a static infrastructure and a mobile picking robot. The LED luminaires at the warehouse ceiling are used to lighten the warehouse space, and to transmit information for positioning and about available racks. The picking robots communicate with the ceiling luminaires to send information about the rack that is being removed and carried to the packaging station. Different codification schemes are proposed to establish both uplink and downlink communication between LED luminaires and mobile robots. Tri-chromatic white LEDs with the red and blue chips modulated at different frequencies and a pinpin photodetector with selective spectral sensitivity are used at the emitter and receiver modules.

Original languageEnglish
Title of host publicationNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII
EditorsGuifang Li, Xiang Zhou
PublisherSPIE-International Society for Optical Engineering
ISBN (Electronic)9781510625365
DOIs
Publication statusPublished - 2019
EventNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII 2019 - San Francisco, United States
Duration: 4 Feb 20197 Feb 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE-International Society for Optical Engineering
Volume10947
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII 2019
CountryUnited States
CitySan Francisco
Period4/02/197/02/19

Keywords

  • Indoor positioning
  • On-off modulation
  • Optoelectronics
  • Picking robot
  • Spectral sensitivity
  • Visible light communication
  • White LEDs

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