Abstract:As a multi-antenna transmission technology, spatial modulation (SM) technology has been gradually applied in visible light communication (VLC) systems, and has become a research hotspot in the field of VLC. Based on analyzing the basic principles of SM technology, the research progresses of optical spatial modulation (OSM) are analyzed and summarized from such three aspects as effectiveness, reliability and combination with other modulation techniques. And the application status and future development trends of OSM are discussed.