RT Journal Article
T1 Design and implementation of a multi-colour visible light communication system based on a light-to-frequency receiver
A1 Martínez-Ciro, Roger Alexander
A1 López-Giraldo, Francisco Eugenio
A1 Betancur-Perez, Andrés Felipe
A1 Luna-Rivera, Jose Martín
AB Colour-shift keying (CSK) is a visible light communication (VLC) modulation scheme used in the existing IEEE 802.15.7 standard. In CSK, information is transmitted by changing the light intensities of the RGB LEDs. In this work, a low-complexity VLC system is proposed using CSK modulation and a novel receiver based on a light-to-frequency (LTF) converter. At the receiver, CSK symbols are interpreted and decoded in terms of frequencies, which are processed by a counter module of a generic microcontroller, thus avoiding the use of analog-to-digital converters (ADCs), which results in a low-cost VLC system. The main contributions of this work are summarized in the following key points: (1) A low-complexity receiver for CSK modulation is introduced; (2) A particle swarm optimization (PSO) algorithm for CSK constellation design is suggested considering the restrictions of the LTF based receiver; (3) Experimental and theoretical validation is perfomed for the proposed multi-colour VLC system. The results show that this system can provide a transmission speed of 100 kbps using a 4-CSK-LTF constellation for a symbol error rate (SER) of 10−4 and a signal to noise ratio (SNR) around 35 dB. These results suggest that the analysed system could find applications on those scenarios where low transmission speeds and ease of deployment are the goals.
PB MDPI
SN 2304-6732
YR 2019
FD 2019-06-01
LK https://hdl.handle.net/10016/37831
UL https://hdl.handle.net/10016/37831
LA eng
DS e-Archivo
RD 30 jun. 2024