Research And Implementation Of Visible Light Communication System Supporting Mobile Access

Visible Light Communication(VLC),as its name implies,is a method of communicating by using visible light.In theory,it is a frequency communication signal that is normally not visible to the naked eye by a light source of visible light,thereby transmitting data.An important means of communication.Therefore,it can be said that visible light not only has the function of illumination,but also takes into account the function of communication.Visible light communication has many advantages,such as fast transmission speed,no electromagnetic interference,convenient network arrangement,etc,and has great development potential.Because of the superiority of visible light communication,more and more research on visible light has begun.In the existing research on optical communication,we can not help but think about the following: In the existing visible light communication system,can we Considering mobile access,the problem of access for users in different locations? With such thinking,this paper focuses on the related issues of mobile access related to visible light communication.The main research work of this paper is as follows:1.Construction and functional simulation of visible light communication system.The visible light source is simulated according to the configuration of the visible light source and the theory of the visible light source.Through the setting of the light source signal,the visible light transmission channel is modulated by OFDM,and the output frequency of the light source is obtained at the receiving end,and the whole communication system of visible light is constructed.2.Research on uplink multi-packet reception problem of visible light communication.In the case where already having visible light,the channel estimation method for the visible light uplink communication link is performed by the multi-address scheme SC-FDMA of the LTE uplink,and the current visible light uplink multi-packet receiving method is expanded.3.Research on visible light communication systems supporting mobile access.The TIM-MAC protocol-based non-position-limited visible light access simulation is designed.The mobile node access mechanism of visible light communication is designed and studied.This protocol not only has a certain effect on the improvement of visible light throughput,but also has better performance.The energy usageefficiency situation also ensures faster speeds in the mobile access process.Through the research of the above three parts,the indoor visible light mobile access research is carried out,and the research results provide important ideas and directions for the further research of visible light communication in the future.