| The continuous change and evolution of communication mode from fiber optic communication based on wired transmission to WiFi communication using wireless transmission has had an important impact on people’s life style.At the same time,a new generation of mobile communications technology-5G,has begun to reach the homes of ordinary users,as the need for high-speed,low-latency Internet access,which has been highlighted.However,with the rapid interconnection of more and more mobile devices and the emergence of various services and applications brought by the industrial revolution that 5G may cause,the originally crowded RF communication bandwidth resources are bound to be further compressed,which will bring challenges to the networking of various digital terminals in the future.Looking for a kind of "optical communication" from the traditional "electric communication"to the new generation of communication technology in the future can not only solve the limited short board of the traditional communication spectrum,but also the theoretical communication rate of light is much higher than that of electricity.Visible light communication as a booming in recent years,a new type of information and communication technologies,with a high bandwidth,ubiquitous coverage,green energy saving,accurate positioning and safety characteristics of the typical technologies,having a broad application prospect in the areas of positioning,wireless communication technology,which is expected to become the mainstream in the future.Based on the application prospect of visible light communication,this paper focuses on the application of visible light in indoor broadband information network technology research and development.However,most current research based on visible light communication focuses on the use of MATLAB programming to generate complex high-order digital modulation,using large instruments such as AWG and BERT as the transmission of visible light communication equipment.The high-speed simplex communication rate is realized by the filter and the focusing lens at the receiving end and the receiving end,which is difficult to be applied to scenes such as industry and real life.This thesis is based on the research and development of indoor broadband visible light communication network technology.The main innovations and work content are as follows.1.Micro-LED as a new generation of light and LED display device,analyzeing the high-speed transmission in the visible light communication as one-way data link.Proposing the microstructure of annular structure to enhance the role of the system bandwidth,and thus promoting the communication rate.Proposing a certain thickness of the wall repair function to the promotion of luminous intensity,which can raise communication distance.2.Based on practical application requirements and considering the complexity and cost of visible light communication system,the research scheme adopts hardware to realize visible light uplinking and downlink full-duplex communication,verifying the possibility of high-speed long-distance communication based on visible light communication in ordinary home users.3.Independently designed the hardware circuits of the transmitter and receiver in the uplink and downlink of visible light communication,and designed the micro-USB power supply circuit of the whole machine;The transmitter includes Ethernet signal extraction circuit,differential to single end circuit,light source drive circuit,and the receiver end includes photoelectric detection circuit,signal processing circuit and other circuit design.4.From the perspective of productization,integration and practicality,the integrated design of each hardware circuit module is integrated on a single board without the need for complex external wiring;The visible light full-duplex communication link was set up and tested,with the communication rate up to 100MBPS and the communication distance up to 10m. |
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