Uplink design in VLC systems with IR sources and beam steering. Issue 3 (1st February 2017)

• Record Type: Journal Article
• Authors: Alresheedi, Mohammed T.; Hussein, Ahmed Taha; Elmirghani, Jaafar M.H.
• Is Part Of: IET communications. Volume 11:Issue 3(2017)
• Page Start: 311
• Page End: 317
• Publication Date: 2017-02-01
• Subjects: beam steering -- free‐space optical communication -- light emitting diodes -- indoor communication; uplink design -- VLC systems -- IR sources -- beam steering -- high‐speed local area networks -- multimedia transmission application -- video transmission application -- visible light communication systems -- light emitting diodes -- LED -- uplink channel design -- indoor VLC -- infrared link -- fast adaptive beam steering IR system -- FABS‐IR -- received optical power signal -- adaptation process -- channel delay spread mitigation -- hybrid diffuse IR link -- signal‐to‐noise ratio -- multipath dispersion -- receiver noise -- transmitter mobility; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2016.0495
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : The need for high‐speed local area networks to meet the recent developments in multimedia and video transmission applications has recently focused interest on visible light communication (VLC) systems. Although VLC systems provide lighting and communications simultaneously from light emitting diodes (LEDs), LEDs, the uplink channel design in such a system is a challenging task. In this study, the authors propose a solution in which the uplink challenge in indoor VLC is resolved by the use of an infrared (IR) link. The authors introduce a novel fast adaptive beam steering IR system (FABS‐IR) to improve the uplink performance at high data rates while providing security for applications. The goal of the authors' proposed system is to enhance the received optical power signal, speed up the adaptation process and mitigate the channel delay spread when the system operates at a high transmission rate. The channel delay spread is minimised from 0.22 ns given by hybrid diffuse IR link to almost 0.07 ns. At 2.5 Gb/s, the authors' results show that the imaging FABS‐IR system accomplished about 11.7 dB signal to noise ratio in the presence of multipath dispersion, receiver noise and transmitter mobility.