2ASK可见光通信系统的硬件设计与实现  

Hardware design and realization of visible light communication system based on 2ASK modulation

作　　者：梁景熙 刘宏展[1] 

机构地区：[1]华南师范大学信息光电子科技学院,广东广州510006

出　　处：《现代电子技术》2015年第21期56-59,共4页Modern Electronics Technique

基　　金：国家自然科学基金(61475049)资助;国家973计划(2013CB29204)资助

摘　　要：可见光通信(VLC)是一种基于白光发光二极管(LED)的新颖无线光通信技术,它能够将照明以及通信两大功能合二为一。为了提高传输距离,考虑到白光LED本身带宽有限,提出一种二进制振幅键控(2ASK)调制预处理方案,设计与实现了相应的LED调制发射、解调接收系统。分模块阐述了系统各部分的原理与电路结构,并且在硬件实验中探究该通信系统的性能。结果证明,在调制信号频率为50 k Hz时,该系统最大不失真传输距离达到503 cm,满足低速、较长距离通信的要求。The visible light communication（VLC） is a novel wireless optical communication technology based on white LED. It can integrate the illumination function with communication function. To increase the transmission distance,the binary amplitude shift keying（2ASK）modulation and pretreatment scheme is proposed by considering the limited bandwidth of white LED. The corresponding LED modulation transmitting and demodulation receiving systems were designed and realized. The principle and circuit structure of each module in the system are described. The performance of this communication system was explored in hardware experiments. The experimental results prove that the maximum distortionless transmission distance can reach503 cm when the modulation frequency is 50 k Hz,which can satisfy the requirement of low-speed long-distance transmission.

关 键 词：可见光通信 白光发光二极管 二进制振幅键控 硬件设计 调制效果 

分 类 号：TN929.1[电子电信—通信与信息系统]