光正交码的系统研究

项目名称： 光正交码的系统研究

项目编号： No.11271089

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 吴佃华

作者单位： 广西师范大学

项目金额： 60万元

中文摘要： 光码分多址接入（OCDMA）技术具有异步接入、动态分配用户带宽、支持多媒体服务和突发通信量需求等良好性能，因此在未来高速光纤网络中最具竞争力。具有良好性能（自相关性和互相关性）的用户地址码（或签名序列），即光正交码，是实现OCDMA网络的基础。光正交码在移动频率、跳频扩频通信、雷达、声钠、无反馈信道和神经网络中也有广泛的应用。本项目主要研究以下4类最优光正交码的构造：（1）自相关数为2，互相关数为1的等重光正交码；（2）系统研究自相关数和互相关数均为1的一维变重量光正交码；（3）部分或全部自相关系数为2，互相关系数为1的一维变重量光正交码；（4）二维变重量光正交码。

中文关键词： 最优；变重量；光正交码；循环填充；二维光正交码

英文摘要： Optical code division multiple access (OCDMA) has been considered as a competitive candidate for the multiple access scheme in the future all-optical networks, especially optical access networks, due to its attractive features such as asynchronous access, dynamic bandwidth assignment, ability to support multimedia services, bursty traffic, and so on. The user address code with better performance (auto-and cross-correlation constraints), i.e. optical orthogonal code (OOC), is the basis for implementing an OCDMA network. The OOCs have found a wide range of applications such as mobile radio, frequency-hopping spread-spectrum communications, radar, sonar, collision channel without feedback and neuromorphic networks. The following problems are studied in this proposal: (1) Constant weight OOCs with auto-correlation constraint 2 and cross-correlation constraint 1; (2) one dimensional variable-weight OOCs with auto-and cross-correlation constraints 1; (3) one dimensional variable-weight OOCs with cross-correlation constraint 1 and atleast one auto-correlation constraint 2; (4) two dimensional variable-weight OOCs with auto-and cross-correlation constraints 1.

英文关键词： optimal；variable-weight；optical orthogonal code；cyclic packing；2D optical orthogonal code