Enhanced inter‐lighting interference cancellation using power control to improve the performance of indoor visible light communication systems. Issue 6 (1st December 2018)

• Record Type: Journal Article
• Authors: Romero‐Munoz, Gabriela Alejandra; Kim, Kyuntak; Lee, Kyesan
• Is Part Of: IET optoelectronics. Volume 12:Issue 6(2018)
• Page Start: 273
• Page End: 279
• Publication Date: 2018-12-01
• Subjects: light emitting diodes -- interference suppression -- error statistics -- indoor communication -- power control -- LED lamps -- optical communication; average bit error rate performance -- multiple‐input‐single‐output visible light communication system -- VLC -- LEDs transmit simultaneously different data -- co‐channel interference -- E‐ILIC -- closed loop power control -- different power level -- power allocation -- received power ratio -- average BER performance -- power weights -- enhanced inter‐lighting interference cancellation -- indoor visible light communication systems -- received signals -- equal powers; Optoelectronics -- Periodicals; 621.36
• DOI: 10.1049/iet-opt.2018.5046
• Languages: English
• ISSNs: 1751-8768

Abstract

Abstract : In this study, the authors propose an enhanced inter‐lighting interference cancellation (E‐ILIC) in order to distinguish the received signals, combating the equal powers at the receiver side and hence improve the average bit error rate (BER) performance of a multiple‐input‐single‐output visible light communication (VLC) system. VLC is a promising technology for indoor environments, it makes use of the light emitting diode (LED) lamps already installed to transmit information through the visible light. When several LEDs transmit simultaneously different data to increase the transmission capacity, it leads to co‐channel interference that degrades the BER performance. For this reason, they investigate E‐ILIC that is a combination of ILIC with closed loop power control to receive the signals with different power level. It employs power allocation at the transmitter when the received power ratio does not comply with a specific threshold. Furthermore, it reduces significantly the interference between adjacent LED lamps, obtaining useful information at the receiver side. Through computer simulations, E‐ILIC achieves the best average BER performance in any user position when the assignment of the power weights is correctly performed on the LEDs.