Visible light communications in intelligent transportation systems

Author

Kumar, Navin ; Lourenço, Nuno ; Terra, Domingos ; Alves, Luis N. ; Aguiar, Rui L.

Author_Institution

Telecommun. Inst., Aveiro, Portugal

fYear

2012

fDate

3-7 June 2012

Firstpage

748

Lastpage

753

Abstract

Emerging intelligent transportation systems (ITS) are based on several technologies. A new concept of integrating visible light communications (VLC) in ITS is introduced in this paper. VLC in ITS is a cost effective method of implementation. This paper presents a VLC broadcast system considering LED-based traffic lights. It discusses the integration of traffic light road side unit (RSUs) within the existing ITS architecture. A prototype demonstrator of the designed VLC systems is also presented. A robust modulation technique based on direct sequence spread spectrum (DSSS) sequence inverse keying (SIK) has been implemented to minimize the effect of noise sources. Experimental results show data communication range of over 40m with 200mm custom designed traffic light, even during bright sun light.

Keywords

code division multiple access; optical communication; optical computing; road traffic; spread spectrum communication; traffic engineering computing; DSSS; ITS architecture; LED-based traffic lights; RSU; SIK; VLC broadcast system; cost effective method; direct sequence spread spectrum; intelligent transportation systems; noise sources minimization; robust modulation technique; sequence inverse keying; traffic light road side unit; visible light communications; Modulation; Noise; Prototypes; Receivers; Roads; Spread spectrum communication; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Vehicles Symposium (IV), 2012 IEEE

Conference_Location

Alcala de Henares

ISSN

1931-0587

Print_ISBN

978-1-4673-2119-8

Type

conf

DOI

10.1109/IVS.2012.6232282

Filename

6232282