Research On Wide Viewing Angle And Anti-jamming Capability Technology Of Visible Light Communication

Visible light communication technology is the way to carry out information transmission by using LED light source to issue high-speed bright and dark flashing signal.As an emerging wireless communication,visible light communication does not take up the existing spectrum band and makes the carrier frequency band up to the wavelength of 380nm-780 nm within the visible light band.The current signal light source uses the existing LED lighting source,has the features of high luminous efficiency,long life,green environmental protection,Safe and reliable,and so on.The advantages of visible light communication are obvious and the application prospect is large,but there are still many technical difficulties that have not been overcome.For example,the reception angle of the receiver is narrow and the anti-interference ability is poor,which seriously affects the practical promotion of visible light communication.In this paper,the reception system of visible light communication is researched deeply,and the problem of small viewing angle and poor anti-interference ability in the current visible light communication is analyzed and proposed a solution.At the receiving end of the communication system,a photodetector array is used instead of a single photodetector and placed on the image plane of the lens group.This paper also designs feasible experimental program.Replace the photodetector array with the OV7670 camera,build hardware test circuit with FPGA,builds a wide viewing angle visible light communication system experimental platform,describes the experimental program in the composition of the circuit to achieve the function of the indoor background and outdoor environment to complete the information and the parameters such as communication distance,viewing angle and background environment are proved.It can prove that the visible light communication can realize communication with more than 60 degrees angle of view,which greatly improves the communication view and the anti-Interference ability of the current visible light communication.