Improve the throughput of M-to-1 free-space optical systems by employing uniquely decodable codes  

作　　者：李亚添 耿天文 高世杰 Yatian Li;Tianwen Geng;Shijie Gao(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Optics Letters》2023年第3期35-40,共6页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(No.62101527);in part by the Funding Program of Innovation Labs by CIOMP。

摘　　要：This paper utilizes uniquely decodable codes[UDCs]in an M-to-1 free-space optical[FSO]system.Benefiting from UDCs’nonorthogonal nature,the sum throughput is improved.We first prove that the uniquely decodable property still holds,even in optical fading channels.It is further discovered that the receiver can extract each source’s data from superimposed symbols with only one processing unit.According to theoretical analysis and simulation results,the throughput gain is up to the normalized UDC’s sum rate in high signal-to-noise ratio cases.An equivalent desktop experiment is also implemented to show the feasibility of the UDC-FSO structure.

关 键 词：free-space optics throughput enhancement uniquely decodable code 

分 类 号：TN929.1[电子电信—通信与信息系统]