Model and Methodology to Characterize Phosphor-Based White LED Visible Light Communication Links
Pau Salvador1, Vicenç Almenar1, Juan Luis Corral2
1Instituto de Telecomunicaciones y Aplicaciones Multimedia, Universitat Politècnica de València, 46022 Valencia, Spain.
Sensors (Basel, Switzerland)
|July 11, 2023
Summary
This study models visible light communication (VLC) systems using phosphor-based white LEDs. The simulation accurately predicts data transmission performance, validating LEDs for future wireless networks.
Area of Science:
- Optoelectronics
- Optical Communications
- Wireless Networking
Background:
- LED lighting is energy-efficient and widely deployed.
- Visible Light Communications (VLC) leverages LEDs for data transmission.
- Phosphor-based white LEDs offer a low-cost VLC solution but have bandwidth limitations.
Purpose of the Study:
- To present a simulation model for a VLC link using phosphor-based white LEDs.
- To develop a method for characterizing the VLC setup for data transmission experiments.
- To validate the simulation model's accuracy against experimental measurements.
Main Methods:
- Developed a simulation model incorporating LED frequency response, noise, and channel attenuation.
- Included angular misalignment effects in the simulation.
- Employed carrierless amplitude phase (CAP) and orthogonal frequency division multiplexing (OFDM) for data transmission validation.
Main Results:
- The simulation model accurately reflects the frequency response and noise characteristics of the VLC system.
- Simulations showed high agreement with experimental measurements for data transmission.
- The model effectively accounts for propagation channel attenuation and angular misalignment.
Conclusions:
- The proposed simulation model is suitable for analyzing and predicting the performance of phosphor-based white LED VLC systems.
- This work validates the use of LEDs in future high-speed optical wireless communication networks.
- The characterization method aids in optimizing VLC link design and performance.
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