超奈奎斯特可见光通信系统的设计与实现  

Design and implementation of faster-than-Nyquist visible light communication system

作　　者：曹明华[1] 张家玮 王效兵 周洪涛 张悦 王惠琴[1] CAO Ming-hua;ZHANG Jia-wei;WANG Xiao-bing;ZHOU Hong-tao;ZHANG Yue;WANG Hui-qin(School of Computer and Communication,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第3期98-103,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(62265010,61875080,62261033)。

摘　　要：为了提升可见光通信系统的通信速率,运用超奈奎斯特通信理论设计了一种超奈奎斯特可见光通信系统.利用波长为660 nm的红光发光二极管、现场可编程门阵列开发板、数/模转换芯片、滤波器芯片和光电二极管以及外围电路模块实现了基于强度调制/直接检测的超奈奎斯特可见光通信系统电路,可以在不显著提高系统复杂度和器件成本的前提下有效提升可见光通信系统的传输速率.性能测试表明,该系统可以实现1 Mbit/s通信速率下超奈奎斯特信号的可靠传输,相较于同等条件下的常规奈奎斯特通信系统,传输速率提升了20%.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 emitting 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 improve 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.

关 键 词：超奈奎斯特 可见光通信 FPGA 

分 类 号：TN929.12[电子电信—通信与信息系统]