不同码型对基于WDM的Li-Fi系统性能影响分析  

Performance influence analysis of different code types on the Li-Fi system based on WDM

作　　者：朱泽人 周雪芳[1] ZHU Zeren;ZHOU Xuefang(School of Communication&Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《光通信技术》2023年第3期48-51,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(61705005)资助;浙江省重点研发计划项目(2019C01G1121168)资助。

摘　　要：为了探寻信源编码对可见光无线通信(Li-Fi)技术的影响,研究了4种不同信源编码方式:不归零(NRZ)码、归零(RZ)码、载波抑制归零(CSRZ)码和双二进制码,并采用OptiSystem软件搭建了基于波分复用(WDM)的Li-Fi系统,讨论了4种码型对基于WDM的Li-Fi系统性能的影响。仿真结果表明:在10 Gb/s传输速率下,NRZ码型在传输距离方面表现较好;在40 Gb/s传输速率下,CSRZ码显露了强大的抗非线性性能及传输距离方面的优势。To explore the impact of source coding on light fidelity(Li-Fi)technology,this paper studies four different source codes methods:non return zero(NRZ)code,return-to-zero(RZ)code,carrier suppressed return-to-zero(CSRZ)code and double binary code,and builds the Li-Fi system based on wave division multiplexing(WDM)by using OptiSystem software to discuss the performance influence of the four codes on the Li-Fi system based on WDM.The simulation results show that the NRZ code type performs well in transmission distance at 10 Gb/s transmission rate and CSRZ code type shows strong anti nonlinear performance and advantages in transmission distance at 40 Gb/s transmission rate.

关 键 词：自由空间光通信 信源编码 Li-Fi系统 误码率 品质因子 

分 类 号：TN914[电子电信—通信与信息系统] TN929.1[电子电信—信息与通信工程]