Multi-user precoder designs for RGB visible light communication systems
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hdl:2117/340347
Tipus de documentArticle
Data publicació2020-11-29
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Abstract
In this paper, we design linear precoders for the downlink of a visible light communication (VLC) system that simultaneously serves multiple users. Instead of using phosphor-coated white light-emitting diodes (PWLEDs), we focus on Red-Green-Blue light-emitting diodes (RGB-LEDs) that allow modulating three separate data streams on the three primary colors of the RGB-LEDs. For this system, we design a zero-forcing (ZF) precoder that maximizes the weighted sum rate for a multilevel pulse amplitude modulation (M-PAM). The precoding design in RGB-based systems presents some challenges due to the system constraints, such as the limited power, the non-negative amplitude constraints per light-emitting diode (LED), and the need to guarantee white light emission while transmitting with RGB-LEDs. For comparison purposes, we also consider the ZF design for a PWLED-based system and evaluate the performance of both a PWLED- and an RGB-based system.
CitacióViñals, R. [et al.]. Multi-user precoder designs for RGB visible light communication systems. "Sensors (Switzerland)", 29 Novembre 2020, vol. 20, núm. 23, article 6836, p. 1-22.
ISSN14248220
Versió de l'editorhttps://www.mdpi.com/1424-8220/20/23/6836
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sensors-20-06836-v2.pdf | 3,156Mb | Visualitza/Obre |