摘要
为了实现更高的LED带宽和数据传输速率,提出一种基于紫光微型LED和正交频分复用的可见光通信系统。首先,通过一个5像素单元的内部阵列和一个10个像素单元的外部阵列来设计紫光微型LED,以匹配塑料光纤的几何形状。然后,为了实施OFDM的发射器和接收器的运行,生成一个实值OFDM波形和一个伪随机比特序列,使用正交振幅调制对随机比特序列进行调制。实验结果表明,与其它可见光通信系统相比,所提系统具有更高的数据传输速率和带宽。
To achieve higher LED bandwidth and data transmission rate, a new visible light communication system based on micro-violet LED and orthogonal frequency division multiplexing （OFDM） is proposed. Firstly, the micro-violet LED design consists of an internal array of 5 pixel units and an external array of 10 pixel units, so as to match the geometry of the plastic fiber. Then, in order to implement the operation of OFDM transmitters and receivers, a real valued OFDM waveform and a pseudo random bit sequence are gen- erated, and the random bit sequence is modulated using quadrature amplitude modulation （QAM）. Experimental results show that, compared with other designs, the proposed design is superior in data transmission rate and bandwidth.
出处
《光通信技术》
北大核心
2017年第12期20-24,共5页
Optical Communication Technology
基金
国家自然科学基金(40839909)资助
重庆市建设科技计划项目(2015CK01)资助
关键词
可见光通信
紫光微型LED
正交频分复用
正交振幅调制
数据传输速率
visible light communication
micro-violet LED
orthogonal frequency division multiplexing
quadrature amplitude modulation
data transmission rate
