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VLC SYSTEM WITH EXTERNAL MODULATION
Sistema VLC con modulación externa: hacia las comunicaciones por luz solar TOWARDS SUNLIGHT COMMUNICATIONS
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VLC SYSTEM WITH EXTERNAL MODULATION: TOWARDS SUNLIGHT COMMUNICATIONS. (2022). Revista EIA, 20(39), 3901 pp. 1-11. https://doi.org/10.24050/reia.v20i39.1600
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In this work we implemented a visible light communication system with external modulation through a $1.5 USD light valve, a logarithmic scale analog light sensor, a $5 USD Fresnel lens, a 12 V LED operating continuously, and 2 Raspberry Pi 3. This work is an initiative to directly exploit sunlight as a radiation source to complement VLC systems with a low implementation cost. The light valve allowed transmitting data at a rate of 100 bps which suggests an application scenario such as wireless sensor networks and in general for the Internet of Things (IoT). Since there is not much room in the radio spectrum to accommodate new wireless communication services and technologies, VLC systems promise to be a great complement to conventional wireless access networks to balance the traffic load present when there is a massive connection of devices in the IoT paradigm.
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