Abstract
In this paper, we report a System-on-Chip (SoC) architecture for OFDM-based Visible Light Communication (VLC). The OFDM block was implemented as VLC PHY layer. The OFDM block comprises of transmitter and receiver. In transmitter block, there are Reed-Solomon encoder, modulator, IFFT, and preamble generator. While in receiver block, there are Reed-Solomon decoder, demodulator, FFT, and synchronizer. In SoC, these blocks are designed as IP cores. The industry standard AXI4-Stream protocol was used for data exchange between IP cores. The OFDM model in SoC was verified by comparing with a MATLAB simulation.
Highlights
Visible Light Communication (VLC) is an alternative optical-based wireless communication technology, it employs visible light as its medium
There are several digital and analog modulations that can be employed in VLC, the most known modulation used includes OOK, PPM and its variations, PWM and its variations, modulations with OFDM schemes such as BPSK, QPSK, QAM
We more highlight the OFDM model that can be divided into two workloads: OFDM block with customized Xilinx IP cores and OFDM block that are designed from scratch, in which ref. [3] is used as the basis of model
Summary
Visible Light Communication (VLC) is an alternative optical-based wireless communication technology, it employs visible light (between Ultraviolet and Infrared spectrums) as its medium. Some research has designed prototypes for VLC. The OFDM modulation was employed in this prototype. In reference [4], a network-enabled VLC system prototype was carried out in the Zynq-7000 SoC platform. The system designed in [4] can reach a throughput about 900 Kb/s In this short paper, we report an SoC model for OFDM-based VLC system. The model was designed and simulated in Xilinx Zynq-7000 SoC. [4] that uses no modulation scheme (directly fed from UART), we used the OFDM modulation for this work. We more highlight the OFDM model that can be divided into two workloads: OFDM block with customized Xilinx IP cores and OFDM block that are designed from scratch, in which ref. The readers can track other research results in [6,7,8] including modulator and demodulator parts the overall systems
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