Avaliação de Eficiência em Canais de Comunicação VLC

Mariana Yukari Yano; Helder May Nunes da Silva Oliveira; Rodrigo Augusto Cardoso da Silva

doi:10.5753/reic.2026.7285

Authors

Mariana Yukari Yano Universidade Federal do ABC
Helder May Nunes da Silva Oliveira Universidade de São Paulo https://orcid.org/0000-0003-3143-6280
Rodrigo Augusto Cardoso da Silva Universidade Federal do ABC https://orcid.org/0000-0002-9874-2605

DOI:

https://doi.org/10.5753/reic.2026.7285

Keywords:

Wireless Optical Communication, Visible Light Communication

Abstract

This paper investigates Visible Light Communication (VLC) systems, an alternative to traditional networks that employs light emitting diodes to transmit data with high security, low cost, and immunity to electromagnetic interference. We analyze the performance of On-Off Keying (OOK) and Variable Pulse Position Modulation (VPPM), as well as the impact of transmitter distance on metrics such as received power, signal-to-noise ratio (SNR), and channel capacity. The results show that VPPM outperforms OOK in spectral efficiency (5 bps/Hz versus 0.2 bps/Hz), particularly at distances shorter than 3 m and for high payloads, due to the more efficient use of the available bandwidth under the constraints imposed by intensity modulation/direct detection (IM/DD) based VLC systems. An optimal transmitter height was identified (2.0 m - 2.5 m), balancing coverage and signal quality; above this range, we observe significant degradation in the communication. We conclude that VPPM is more suitable for high-data rate applications, while OOK remains viable for low–complexity scenarios, and that installation height is a critical parameter for system optimization.

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Evaluation of Efficiency in VLC Communication Channels

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