Optimization of Transmitter Layout Design in Visible Light Communication with Different Receiver Heights

The visible light communication based on white light-emitting diode has the advantages of no spectrum authentication, fast transmission rate and high confidentiality. In recent years, it has been studied by many researchers. However, the existing research topics rarely involve the research on the height of multiple receivers of visible light communication. Based on the symmetrical layout model, this paper simulates the four heights that often appear in the fourth-grade classroom scene, puts forward the determination scheme of the optimal layout of signal-to-noise ratio at different heights, and determines the optimal layout of channel quality in this sense, that is, the optimal layout of comprehensive height signal-to-noise ratio. By comparing the optimal layout of signal-to-noise ratio of four heights, the optimal layout of comprehensive height signal-to-noise ratio and conventional layout, it is concluded that the optimal layout of comprehensive height signal-to-noise ratio is the best in terms of the uniformity of signal-to-noise ratio of each height. In terms of illumination uniformity of desktop height, the best layout of desktop height signal-to-noise ratio is the best, followed by the best layout of comprehensive height signal-to-noise ratio. Finally, the signal-to-noise ratio distribution, root mean square delay spread distribution and impulse response of the four height planes with the best layout of height signal-to-noise ratio are compared. The results show that the layout has good performance in three height planes: desktop height, seat height and sitting height.