Research Of Visible And Infrared Optical Communication System Based On Inverse Problem Optimization Solution

Visible light communication(VLC:Visible Light Communication)and infrared communication(IC:Infrared communication)belong to optical wireless communication technology(OWC:Optical Wireless Communication),which is a communication technology that uses visible light and infrared light as a carrier for information transmission.The use of inverse problem solving for optical signal restoration has also become a new trend in the field of optical communications in recent years.This paper presents a visible and infrared optical communication system based on the inverse problem optimization solution.The VLC system has been experimented in the 380 nm-780 nm wave band,using the method of transmitting the optical signal at the transmitter end to make the optical signals in different areas appear at different positions on the detection interface of the signal receiver.The light source can use light of the same wavelength as the carrier,and the system data transmission rate can reach 3.84 kbit/s.Based on the inverse problem solving method in the process of optical signal restoration,this paper improves the inverse problem optimization solution algorithms of L₁norm algorithm,L₂ norm algorithm,simulated annealing algorithm and genetic algorithm,and analyzes the signal restoration performance of different algorithms.It shows that the lowest bit error rate of the system when using L₂ norm algorithm can reach 2.25×10^-3.Finally,in the absence of lighting requirements,this paper uses the method of infrared display card combining with CCD,successfully experimented with different experimental structures in the infrared band of 1530nm-1570 nm,and the results verify the feasibility of this infrared optical communication method.Compared with the traditional optical communication system,the optical communication system proposed in this paper is expected to achieve the advantages of signal restoration solution optimization,low system cost,simple structure,and large channel capacity.The method of widening the detection range of the CCD proposed in the article also has a certain guiding significance in the field of infrared communication.