Abstract
In order to ensure stable, correct and real-time high-speed transmission of indoor visible light communication (VLC), the key modulation and demodulation technologies of orthogonal frequency division multiplexing (OFDM) are studied in this paper. The time-domain synchronization, frequency synchronization and channel equalization of receiver are analyzed and optimized by utilizing short and long training preamble. Moreover, field programmable gate array (FPGA) development board (Xilinx Kintex-7) and Verilog hardware description language are used to realize the design of proposed OFDM-VLC system. Simulation and experiment both verify the feasibility of the hardware designs of this system. The proposed OFDM-based VLC system can process signal in real-time, which can be used in actual VLC application systems.
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This work has been supported by the National High Technology Research and Development Program of China (863 Program) (No.2015AA033303), the National Key Basic Research Program of China (973 program) (No.2013CB329204), the National Nature Science Foundation of China (Nos.61178051, 61321063 and 61335010), and the Science and Technology Project of Guangdong Province in China (No.2014B010120004).
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Wu, Ch., Gao, Zy., Li, Hl. et al. Realization of OFDM modulation and demodulation for visible light communication based on FPGA. Optoelectron. Lett. 13, 58–62 (2017). https://doi.org/10.1007/s11801-017-6233-4
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DOI: https://doi.org/10.1007/s11801-017-6233-4