Visible Light Communication Network Technology Base On CDMA Technology

In the21th century, high speed data transmission will play an important role in our daily life. Multimedia information is envisaged to be available at any place and at any time. Wireless access networks constitute a key element to achieving these goals. Recently, rapid development of wireless communication scheme has gained interest. One of them is a visible light communication (VLC) system which is being attracted as the next generation wireless communication system. The VLC system is a communication system using radiated light of LEDs. They are the best parts of VLC that communicate information and illuminate simultaneously because LEDs are a semiconductor diode that emits incoherent narrow-spectrum light. The LED illumination system can omit the installation fee charge of the communication infra and the environment disruption problem.This article will present the characteristics of the visible light communication systems based on CDMA and discuss the application of CDMA technology to communicate input ports and output ports inside a switch and research status and development trends, then analysis of the spectral response characteristics of CDMA and the basic model of indoor visible light communication channels, and the same time analysis visible light communications system use of some of the modulation.