Research Progress on Visible-Light Communication Uplinks

Uplink refers to the link through which the response signal is transmitted from the receiving end to the sending end. This paper summarizes the research progress of visible light communication uplink at home and abroad, and the existing application scheme of LED visible light uplink, mainly describes the principle and scheme of RF uplink, visible light uplink, infrared uplink, power carrier uplink, and visible light uplink using reverse modulation technology. Finally, the advantages and disadvantages of existing schemes are given, and the development direction of visible light communication uplink is forecasted.