基于时域/频域OCDMA系统的一种新型二维变码重光正交码构造  

A novel construction of two-dimensional variable weight optical orthogonal code based on time domain/frequency domain OCDMA systems

作　　者：卢卓 李传起 陆叶[1] 刘志强[3] 刘勇志 陈东 LU Zhuo;LI Chuanqi;LU Ye;LIU Zhiqiang;LIU Yongzhi;CHEN Dong(Lab of Optoelectronics and Optical Communications,College of Electronic Engineering,GuangxiNormal University Guilin Guangxi 541004,China;College of Physics and Electronic Engineering,Nanning Normal University,Nanning 530001,China;The No.34 Research Institute of CETC,Guilin Guangxi 541004,China;Guangxi Radio&TV Network Corporation Nanning Branch,Nanning 530023,China)

机构地区：[1]广西师范大学电子工程学院光电子与光通信实验室,广西桂林541004 [2]南宁师范大学物理与电子工程学院,南宁530001 [3]中国电子科技集团公司第三十四研究所,广西桂林541004 [4]广西广播电视信息网络股份有限公司南宁分公司,南宁530023

出　　处：《激光杂志》2020年第2期68-72,共5页Laser Journal

基　　金：广西科技计划(No.AB17292082);(No.AB18126025)

摘　　要：构造了一种适用于光码分多址(OCDMA)系统的新型二维变码重光正交码(2D-VWOOC),用于满足不同用户及业务对服务质量(QoS)的不同要求,以两两正交拉丁方阵序列(MOLS)为波长跳频序列,以一维严格变码重光正交码(1D-SVWOOC)为扩时序列。分析了该码字在不同参数(码长、码重及波长数)下的码字性能;在相同条件下与其他二维变码重光正交码进行对比,该码字码容量较大,误码率相对其他码字低9~17个数量级。在Optisystem仿真中,当系统传输速率为16 Gbits/s时,码重为4比码重为2的用户误码率低2个数量级,能获得清晰端正的眼图。A new two-dimensional variable weight optical orthogonal code(2 D-VWOOC)suitable for optical code division multiple access(OCDMA)system is constructed to solve the different requirements of different users and services for quality of service(QoS).With Mutually Orthogonal Latin Square(MOLS)as wavelength hopping sequence,and one-dimensional strict variable weight optical orthogonal code(1 D-SVWOOC)as time spreading sequence,the code performances of the code under different parameters,such as code length,code weight and number of wavelengths,are analyzed.Compared with other 2 D-VWOOCs under the same conditions,this code has a large capacity,and the BER is 9~17 orders of magnitude lower than other codes.In Optisystem simulation,when the transmission rate of the system is 16 Gbits/s,the BER of users with code weight 4 is two orders of magnitude lower than that of users with code weight 2,and a clear and correct eye diagram can be obtained.

关 键 词：光码分多址 正交拉丁方 严格变码重光正交码 服务质量 

分 类 号：TN249[电子电信—物理电子学]