Visible light communication system(VLC) Using Diversity Technique with 4 QAM OFDM FSO Link

VLC (Visible Light Communication) is one of the new trends in future communication. In the VLC system, we used FSO as a medium. These VLC FSO systems bring explanation directed toward congestion issues from the RF communication systems, similar frequency range scalable, price influence also mobility. However climatic environment alike smog, storm... etc, Line of sight are some of the demand trouble in realizing this system. In this paper, we designed a high speed communication system for VLC using spatial diversity using filter and amplifier. Here considered link distance is 100 m and by simulation we analyze achievable bit rate 20Gbps. This proposed system can be used for higher data rate in communication for VLC Transmitting distance can be become better by diminishing the fading in free space. Spatial diversity is specific adept techniques to decrease hazy things. In this paper, we evaluate the performance of optical to electrical power conversion, Clear constellation diagram of VLC System corresponding distance from the transmitter to receiver. The ambition hereof paper must include the Diversity technique inside VLC FSO OFDM, in case add to FSO link is created. The achievement study is finalized conclusion of Constellation diagram.