Morales Céspedes, MáximoGarcía-Armada, Ana2023-02-212023-02-212019-08-27Morales Céspedes, M. & García Armada, A. (27-30 August 2019). Characterization of the visible light communications during the construction of tunnels [proceedings]. 16th International Symposium on Wireless Communication Systems (ISWCS), Oulu, Finland.978-1-7281-2527-5https://hdl.handle.net/10016/36619Proceedings of: 16th International Symposium on Wireless Communication Systems (ISWCS), 27-30 August 2019, Oulu, Finland.Visible Light Communications (VLC) are proposed to provide connectivity within the framework of the Industry 4.0 because of their resilience in industrial environments in comparison with radio-frequency (RF) transmission systems. In this work, we focus on providing connectivity during the construction of tunnels. Notice that other aLTErnatives such as the radiant cable are restricted to implement them once the construction of the tunnel has been finished. First, we characterize the optical channel taking into consideration the reflections that occur in a confined structure. It is shown that the quality of the channel, and therefore, the symbol error rate, depends on the angle of incidence of the receiver. We propose the use of receivers composed of multiple photodiodes following an angle diversity arrangement with the aim of ensuring a minimum symbol error rate (SER). Simulation results show that this approach allow us to improve the robustness of the VLC systems during the construction of tunnels or other confined structure.5eng© 2019, IEEEOptical transmittersPhotodiodesNonlinear opticsOptical receiversOptical pulsesRadio frequencyconference proceedingsTelecomunicacioneshttps://doi.org/10.1109/ISWCS.2019.8877189open access3563602019 16th International Symposium on Wireless Communication Systems (ISWCS)CC/0000030435