摘要: Wireless optical communication (WOC) has been widely concerned by the industry due to its advantages of wide bandwidth, high transmission rate, better security, and no need of authorized spectrum. As the fifth generation communica... 展开 Wireless optical communication (WOC) has been widely concerned by the industry due to its advantages of wide bandwidth, high transmission rate, better security, and no need of authorized spectrum. As the fifth generation communication and beyond five generations the rapid development of communication system, and to give full play to the advantages of WOC, this paper reviews the relay technology under indoor wireless optical communications, outdoor wireless optical communications and underwater wireless optical communication, elaborates based on relay technology of the three methods of communication protocol, channel model and modulation method, combining with specific experimental analysis of its performance. Finally, main problems of relay WOC are pointed out and the potential solutions are also given. 收起