基于可见光通信技术的全双工以太网通信系统设计

Full-Duplex Indoor Ethernet Communication System Based on Visible Light Communication

利用可见光通信技术来传输以太网信号能够克服传统无线通信速率低、频谱资源紧张、使用场景受限等缺点.针对传统的可见光通信系统难以实现高速以太网通信的问题,本文设计了满足以太网技术要求的全双工可见光通信系统.系统主要包括以太网接口处理电路、差分转单端、单端转差分电路、光源驱动电路、光电检测电路,上、下行链路都采用可见光通信技术对以太网信号进行透明传输,无须调制即可实现高速以太网通信.经测试,本系统可在通信距离为10 m的情况下实现100 Mbps以太网的全双工通信.

Using visible light communication technology to transmit Ethernet signals can overcome the disadvantages of traditional wireless communication,such as low communication rate,tight spectrum resources and restricted application scenarios.Aiming at the problem that the traditional visible light communication system is difficult to realize the bidirec⁃tional Ethernet communication,this paper designs a full duplex visible light communication system to meet the technical re⁃quirements of Ethernet.This system mainly includes Ethernet extraction circuit,differential to single-ended circuit,singleended to differential circuit,drive circuit and photoelectric detection circuit.Visible light communication technology is used to transmit Ethernet signals transparently in the both uplink and downlink of the system,which can realize high-speed com⁃munication without modulation.The experimental results show that the system can realize 100Mbps Ethernet full duplex communication under the condition of 10 meters communication distance.