Research And System Implementation Of Miniaturized Visible Light Real-Time Communication Technology

In recent years,the research boom on visible light communication(VLC)technology has continued to heat up,the rate of VLC systems has been continuously improved,and application scenarios are constantly being enriched.VLC technology has been regarded as an important part of traditional wireless radio frequency communication technology since its birth.In addition,because it is green and does not need to apply for spectrum authorization,it attracts more and more scholars to invest in research,and LED-based visible light communication is undoubtedly one of the most attractive directions.LED is being popularized as a new generation of lighting equipment.At the same time,LED is also characterized by small size,light weight,energy saving and long life cycle.Therefore,LED-based VLC technology has received extensive attention and focused research.At this stage,examples of practical applications of VLC technology have emerged,such as VLC-based indoor positioning.Because of the transmission rate bottleneck,VLC has not penetrated into various industries like traditional radio frequency technology,but this does not mean that low-speed VLC systems have no use.In this paper,the research on miniaturized visible light real-time communication technology is carried out,and the experimental system is built to realize data file transmission and audio transmission.The bit error rate is zero at a distance of 70 meters.The main work and innovations of the thesis are as follows:First,the structure and working principle of the VLC system are expounded.The miniaturized real-time VLC system scheme is designed.The performance of the core device is tested and compared,and the selection of the core device is completed.Second,the problems faced by miniaturization of VLC system are analyzed.Based on the test analysis,the optical components of the transceiver end of the miniaturized VLC system are designed.The measured results show that the design solves the problem of signal attenuation of VLC system at a long distance and Quasi-problem.Thirdly,a real-time miniaturized VLC test system based on LED was built,and the file data transmission and audio transmission experiments based on the system were completed.The test results show that the error rate of the system is zero when the data communication is performed at a rate of 100 kbps at a distance of 70 meters.