Visible Light Communication Technology Research Based On Android And ARM

As a new communication method,visible light communication(VLC)is expected to relieve the current shortage of spectrum resources and is more environmentally friendly.Therefore,VLC has become a research hot spot in recent years and is considered to be a promising technology in future wireless communications.The transmission rate of visible light communication has been upgraded from the original magnitude of kbit/s to the current magnitude of hundreds of Mbit/s.In recent decades,the development of mobile terminals led by smartphones has been very rapid.Better cameras and brighter screens are the key to ongoing optimization by handset manufacturers.Now most of the phones are equipped with dual cameras,and the resolution of the screen has also been improving.Visible light communication using the camera and the phone screen has also attracted people's attention.The mobile terminal communication system based on visible light communication can realize the transmission of simple information data between the mobile terminal and the external communication equipment,the operation is more humane,the structure is simpler,the cost is lower and the occupation space is smaller.Visible light communication will occupy a very important position in the future mobile terminal communication and greatly promote the development of information society.Based on the traditional visible light indoor transmission system,this paper proposes a VLC system based on ARM and Android based on the combination of VLC technology and mobile communication terminal.The development and implementation are completed and the test and analysis are completed.The main work and innovation of the dissertation are as follows:1.Analyzed the working characteristic of LED,indoor visible light communication channel characteristic and advantage of ARM platform,put forward the visible light communication system based on ARM.Thesystem is analyzed in detail from hardware circuit,transmission rate,transmission distance and bit error rate.2.In order to make the system more mobile and miniaturized,a visible light communication system based on the mobile phone screen and the camera is proposed.The operating principle of the mobile phone camera and the color principle of the mobile phone screen display are analyzed in detail.Based on this,the design of the whole system is proposed.3.This paper analyzes in detail the blurring effect of visible light communication in mobile phone screen during transmission,proposes an adaptive reordering algorithm and fast location method,and studies the system from aspects of transmission rate,transmission distance and coding method,and verifies Feasibility of the program.