基于OOK和ACO-OFDM的分层混合可见光通信系统  

Layered hybrid visible light communication system based on OOK and ACO-OFDM

作　　者：肖之雨 荆雷 童峥嵘[1] 杨琨 于建萍 李泽 XIAO Zhiyu;JING Lei;TONG Zhengrong;YANG Kun;YU Jianping;LI Ze(Department of Integrated Circuit Engineering,Tianjin University of Technology,Tianjin 300384,China;Army Academy of Armored Forces,Beijing 100072,China)

机构地区：[1]天津理工大学集成电路工程学院,天津300384 [2]陆军装甲部队学院,北京100072

出　　处：《光通信技术》2025年第1期31-37,共7页Optical Communication Technology

基　　金：应用光学国家重点实验室开放课题基金项目(SKLA020200-01A02)资助。

摘　　要：为提高系统频谱效率并解决传统正交频分复用(OFDM)系统信号模式单一的问题,设计了一种基于二进制开关键控(OOK)和自适应星座图优化(ACO)-OFDM的分层混合可见光通信系统。该系统发射端利用OOK信号对OFDM信号进行限幅处理,产生ACO-OFDM和非自适应星座图优化(NACO)-OFDM信号。将OOK信号作为直流偏置加入到NACO-OFDM信号中,确保输出为单极性实数信号。接收端采用信号重构技术,省略噪声估计步骤,降低接收复杂度至传统接收机的约1/5。仿真结果表明:系统能够有效解调OFDM和OOK信号,在最大传输层数下,其频谱效率较常规单层系统提升了约2倍。To improve the spectral efficiency of the system and solve the problem of single signal mode in traditional orthogonal frequency division multiplexing(OFDM)systems,a layered hybrid visible light communication system based on binary on-off keying(OOK)and adaptive constellation optimization(ACO-OFDM)is designed.The transmitting end of the system uses OOK signals to limit the OFDM signal,generating ACO-OFDM and non adaptive constellation optimization(NACO)-OFDM signals.Add the OOK signal as a direct current(DC)bias to the NACO-OFDM signal to ensure that the output is a unipolar real signal.The receiving end adopts signal reconstruction technology,omitting the noise estimation step and reducing the receiving complexity to about 1/5 of traditional receivers.The simulation results show that the system can effectively demodulate OFDM and OOK signals,and at the maximum transmission layer,its spectral efficiency is about twice that of conventional single-layer systems.

关 键 词：二进制开关键控 自适应星座图优化-正交频分复用 可见光通信系统 强度调制/直接检测 

分 类 号：TN929[电子电信—通信与信息系统]