Design and implementation of faster-than-Nyquist visible light communication system
In order to improve the data rate of visible light communications(VLC),a faster-than-Nyquist(FTN)VLC system is proposed based on the faster-than-Nyquist communication theory.Red light emit-ting diode(LED)with the wavelength of 660 nm,field programmable gate array(FPGA),digital/analog(D/A)conversion chip,filter chips,photo-diodes(PD),and related modules are employed to build the transceiver circuits with intensity modulation/direct detection.The proposed system can effectively im-prove the transmission rate of the VLC system without significantly increasing the system's complexity and cost.Performance tests show that the system discussed here can realize FTN signal transmission at 1 Mbit/s,which is about 20％higher than the conventional Nyquist communication system with the same electronic and optical components.
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维普
