一种OLS/OOC二维光正交码的构造与性能分析  

A Construction of 2-D Optical Orthogonal Codes OLS/OOC and Its Performance Analysis

作　　者：杨刘洋 吕翔[1] 刘中帅 

机构地区：[1]浙江师范大学数理信息与工程学院,浙江金华321004 [2]重庆市潼南中学校,重庆402660

出　　处：《数学的实践与认识》2017年第8期139-146,共8页Mathematics in Practice and Theory

基　　金：浙江省科技厅创新团队项目(2010R5007)

摘　　要：利用不同的序列作为波长跳频序列和时间扩频序列可以构造出不同的二维光正交码在众多文献中已有所报道.在经过正交拉丁方(OLS)与跳频序列的相关性研究之后.做了以下主要工作:首先,将正交拉丁方(OLS)序列作为波长跳频序列,结合一维时间扩频序列(OOC),构造了一种OLS/OOC二维光正交码.然后,本文对构造的OLS/OOC进行了多种性能仿真和分析.相对于PC/OOC、OCFHC/OOC等二维光正交码而言,OLS/OOC的波长数并不局限于素数,更能充分利用MWOCDMA系统中的有效波长数.仿真和分析表明:码字具有很好的相关性能,码字容量直逼理论极限,为一种渐近最优二维光正交码.Different methods based on various wavelength hopping sequences and time spreading sequences to construct different 2D- OOC were introduced in many papers. After the studying of the relationship between Orthogonal Latin Square （OLS） and the frequency hopping sequence family, the following works are presented in this paper. Firstly, a new OLS/OOC 2D-OOC construction method is proposed by using OLS as wavelength hopping sequences and OOC as 1D time spreading sequence. Secondly, performance analysis and sim- ulation is done for this constructed OLS/OOC. Compared with PC/OOC, OCFHC/OOC, the wavelength number was not limited to prime number for this OLS/OOC. Thus, the wavelength number of the MWOCDMA could be made full use. Simulation and analysis work indicates that this code has well correlation performance, well code capacity which approach theoretical limits. Thus, this code is an asymptotically optimal 2D-OOC.

关 键 词：光码分多址 二维光正交码 拉丁方 正交拉丁方 

分 类 号：TN929.1[电子电信—通信与信息系统]