Direct digital synthesis and current mirror based software defined general purpose visible light communication transmitter

Leikanger, Tore; Häkkinen, Juha (2019-05-01)
 
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https://doi.org/10.1109/ISCAS.2019.8702767

Leikanger, Tore
Häkkinen, Juha
Institute of Electrical and Electronics Engineers
01.05.2019

T. Leikanger and J. Häkkinen, "Direct Digital Synthesis and Current Mirror Based Software Defined General Purpose Visible Light Communication Transmitter," 2019 IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan, 2019, pp. 1-4. doi: 10.1109/ISCAS.2019.8702767

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doi:https://doi.org/10.1109/ISCAS.2019.8702767
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Abstract

In this paper, a visible light communication transmitter using a LED matrix with low-cost LEDs is shown. This design use a DAC to control the LED drivers, through a discrete component current mirror circuit. The DAC is controlled using an FPGA, which together works as a highly configurable direct digital synthesiser. The design proposed in this paper is thus well suited as a transmitter node in a software defined radio using visible light communication. In this paper, we describe the design, and show its behaviour when programmed to transmit a number of carriers modulated with amplitude and phase modulation schemes.

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