Integration of Dimming into LiFi Systems

Autor:	Mohamed Sufyan Islim, Trang Nguyen, Harald Hass
Rok vydání:	2020
Předmět:	Brightness Modulation Computer science Q factor Direct current Electronic engineering Spectral efficiency Field-programmable gate array Communications system Pulse-width modulation
Zdroj:	VTC Spring
DOI:	10.1109/vtc2020-spring48590.2020.9128398
Popis:	This paper investigates practical solutions to control the brightness of a visible light-based Light Fidelity (LiFi) system. The main objective is to achieve a wide dimming range while maintaining a high communication performance. Experimental studies are presented on the integration of dimming techniques into a communication system using a National Instruments (NI) PXIe-1085 and a NI-7966R Field Programmable Gate Array (FPGA). Pulse-width-modulation (PWM) dimming and amplitude-modulation (AM) dimming are applied to direct current (DC)-biased optical frequency division multiplexing (DCO-OFDM) and augmented spectral efficiency discrete multi-tone (ASE-DMT) modulation schemes. A reliable communication link with a measured Q-factor over 15 dB is realized at dimming levels between 5% and 95%. The performance comparison demonstrates that ASE-DMT is more suitable for dimming applications with up to a 7 dB higher Q factor than that of DCO-OFDM.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a6d46c83d47551e0be5657160104b3a https://doi.org/10.1109/vtc2020-spring48590.2020.9128398 Zobrazit plný text záznamu