现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
21期
56-59
,共4页
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
可見光通信%白光髮光二極管%二進製振幅鍵控%硬件設計%調製效果
가견광통신%백광발광이겁관%이진제진폭건공%경건설계%조제효과
visible light communication%white LED%2ASK%hardware design%modulation effect
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 kHz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.
可見光通信(VLC)是一種基于白光髮光二極管(LED)的新穎無線光通信技術,它能夠將照明以及通信兩大功能閤二為一.為瞭提高傳輸距離,攷慮到白光LED本身帶寬有限,提齣一種二進製振幅鍵控(2ASK)調製預處理方案,設計與實現瞭相應的LED調製髮射、解調接收繫統.分模塊闡述瞭繫統各部分的原理與電路結構,併且在硬件實驗中探究該通信繫統的性能.結果證明,在調製信號頻率為50 kHz時,該繫統最大不失真傳輸距離達到503 cm,滿足低速、較長距離通信的要求.
가견광통신(VLC)시일충기우백광발광이겁관(LED)적신영무선광통신기술,타능구장조명이급통신량대공능합이위일.위료제고전수거리,고필도백광LED본신대관유한,제출일충이진제진폭건공(2ASK)조제예처리방안,설계여실현료상응적LED조제발사、해조접수계통.분모괴천술료계통각부분적원리여전로결구,병차재경건실험중탐구해통신계통적성능.결과증명,재조제신호빈솔위50 kHz시,해계통최대불실진전수거리체도503 cm,만족저속、교장거리통신적요구.
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 prin-ciple and circuit structure of each module in the system are described. The performance of this communication system was ex-plored in hardware experiments. The experimental results prove that the maximum distortionless transmission distance can reach 503 cm when the modulation frequency is 50 kHz,which can satisfy the requirement of low-speed long-distance transmission.
