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At the receiver side, the data is extracted using a photosensitive element able to detect the variations of the light intensity.
A VLC system mainly consists of a VLC transmitter that modulates the light produced by LEDs and a VLC receiver based on a photosensitive element (photodiode) that is used to extract the modulated signal from the light.
Generally, the VLC receivers are based on photosensitive elements which have high bandwidth and offer the possibility of high-speed communications.
Table 5.1: Bit Error Ratio (BER) for Miller and Manchester codes at 15 kHz modulation frequency using a photodiode as a photosensitive element.
The developed prototype is based on a single photosensitive element used for the entire visible light spectrum, from 380 to 780 nm.
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