There are research efforts to explore the unconventional communication techniques for the next generation. The overcrowded and limited BW of RF spectrum has paved the pathway for visible light communication. Li-Fi has evolved with the tremendous growing technology. This paper presents a communication system based on Light fidelity (Li-Fi). In this paper, simulation of the transmitter-receiver system has been done. The major contribution of the work is in the signal analysis of transmitted data. We achieved received signal power density for text data type. The variation of received 3D power distribution along with signal to noise ratio at receiver end with respect to perpendicular distance between receiver and transmitter is presented in this work.