TY - GEN
T1 - Evaluation of Modulation Techniques in MIMO-VLC Systems
T2 - 2025 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, CHILECON 2025
AU - Guaña-Moya, Javier
AU - Cañizares, Milton Román
AU - Romero, Laura
AU - Játiva, Pablo Palacios
AU - Azurdia-Meza, Cesar A.
AU - Zabala-Blanco, David
AU - Soto, Ismael
AU - Reyes, Maria Camila
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - Visible Light Communication (VLC) can be substantially improved by using 2 × 2 Multiple-Input Multiple-Output (MIMO) links, which increase both throughput and coverage; however, the presence of ambient illumination remains a major performance limiter. In this work, we analyze three modulation options-Non-Return-to-Zero (NRZ), Return-to-Zero (RZ), and Quadrature Phase-Shift Keying (QPSK)-for a MIMO-VLC transmission and benchmark them against a Single-Input Single-Output (SISO) baseline. Trace-based OptiSystem simulations indicate that MIMO increases the noise-free reach from 1.12 km (SISO) to 1.45 km when using QPSK, and it reduces the Bit Error Rate (BER) at short ranges by roughly a factor of two. When two ambient interferers are present (fluorescent lamp and white LED), the MIMO reach decreases by 13.6% but still remains 150 m longer than the SISO link. Overall, NRZ and QPSK show the highest robustness, achieving BER < 10−3 with the smallest power penalty. The results highlight that compact MIMO combined with spectrally efficient modulation enables long-reach VLC under practical lighting conditions.
AB - Visible Light Communication (VLC) can be substantially improved by using 2 × 2 Multiple-Input Multiple-Output (MIMO) links, which increase both throughput and coverage; however, the presence of ambient illumination remains a major performance limiter. In this work, we analyze three modulation options-Non-Return-to-Zero (NRZ), Return-to-Zero (RZ), and Quadrature Phase-Shift Keying (QPSK)-for a MIMO-VLC transmission and benchmark them against a Single-Input Single-Output (SISO) baseline. Trace-based OptiSystem simulations indicate that MIMO increases the noise-free reach from 1.12 km (SISO) to 1.45 km when using QPSK, and it reduces the Bit Error Rate (BER) at short ranges by roughly a factor of two. When two ambient interferers are present (fluorescent lamp and white LED), the MIMO reach decreases by 13.6% but still remains 150 m longer than the SISO link. Overall, NRZ and QPSK show the highest robustness, achieving BER < 10−3 with the smallest power penalty. The results highlight that compact MIMO combined with spectrally efficient modulation enables long-reach VLC under practical lighting conditions.
KW - Ambient-light interference
KW - data rate
KW - modulation formats
KW - multiple-input multiple-output (MIMO)
KW - optical wireless communications
KW - visible light communication (VLC)
UR - https://www.scopus.com/pages/publications/105038019316
U2 - 10.1109/CHILECON66915.2025.11476086
DO - 10.1109/CHILECON66915.2025.11476086
M3 - Contribución a la conferencia
AN - SCOPUS:105038019316
T3 - Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon
BT - 2025 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, CHILECON 2025
A2 - Lefranc, Gaston
A2 - Cubillos, Claudio
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 28 October 2025 through 30 October 2025
ER -