Abstract
A Visible Light Communication (VLC) transmitter based on the use of DC-DC power converters is presented in this work. The architecture is made up of two DC-DC power converters in output-series connection. One of them is responsible for performing the communication functionality by operating at high switching frequency (10 MHz), whereas the second one fulfills the illumination functionality by ensuring a certain biasing point. The proposed structure enables the split of the power, thus reducing the power delivered by the fast-response DC-DC power converter. Therefore, its switching losses do not jeopardize excessively the efficiency of the VLC transmitter. As a result, an overall efficiency around 90% can be achieved even when Si MOSFETs are employed. In addition, the proposed VLC transmitter is able to reproduce a wide range of digital modulation schemes, including Orthogonal Frequency Division Multiplexing (OFDM).
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