Abstract
Side effect modulation (SEM) has been shown to be an important impairment in visible light communication (VLC) systems. SEM is the unintended modulation of the light caused by the switched mode power supplies which are often used in light emitting diode (LED) luminaires. These power supplies may result in fluctuations in the driving current. In this paper, we investigate the performance of VLC in two different configurations. In both configurations, simulation results show that even low levels of SEM can substantially degrade the performance for most receiver positions. An iterative decision-directed receiver is described which mitigates the effect of SEM. In this receiver, the fundamental frequency component of SEM is estimated and removed from the received signal. The iterative processing is used to improve the estimation accuracy and thus improve performance. The iterative receiver is compared to the previously described decision-directed and pilot-assisted receivers. It is shown that, with only two iterations, the iterative decision-directed receiver effectively mitigates the impact of SEM.
Original language | English |
---|---|
Title of host publication | 2018 28th International Telecommunication Networks and Applications Conference (ITNAC) |
Editors | Khandakar E Ahmed, Kashinath Basu, Keshav Sood |
Place of Publication | Piscataway NJ USA |
Publisher | IEEE, Institute of Electrical and Electronics Engineers |
Pages | 343-348 |
Number of pages | 6 |
ISBN (Electronic) | 9781538671771, 9781538671764 |
ISBN (Print) | 9781538671788 |
DOIs | |
Publication status | Published - 2018 |
Event | International Telecommunication Networks and Applications Conference 2018 - Sydney, Australia Duration: 21 Nov 2018 → 23 Nov 2018 Conference number: 28th https://itnac.org.au/2018/21-23-november-2018-university-new-south-wales-sydney-australia (Conference website) https://ieeexplore.ieee.org/xpl/conhome/8598648/proceeding (Proceedings) |
Conference
Conference | International Telecommunication Networks and Applications Conference 2018 |
---|---|
Abbreviated title | ITNAC 2018 |
Country/Territory | Australia |
City | Sydney |
Period | 21/11/18 → 23/11/18 |
Internet address |
Keywords
- ACO-OFDM
- estimation
- interference
- side-effect modulation
- VLC