| 基于光码柱面的二维地址码相关性分析和码字容量研究 |
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| 引用本文： | 李传起,孙小函,蔡杰,夏青.基于光码柱面的二维地址码相关性分析和码字容量研究[J].量子电子学报,2007,24(2):231-235. |
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| 作者姓名： | 李传起 孙小函 蔡杰 夏青 |
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| 作者单位： | 1. 南京信息工程大学物理系,江苏,南京,210044
2. 东南大学电子工程系,江苏,南京,210096 |
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| 基金项目： | 江苏省高校自然科学基金计划项目，教育部国家留学回国人员科研启动基金 |
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| 摘 要： | 在谱域和时域同时编码的二维OCDMA系统是增加系统容量的主要方案.在一维光码盘和光码环的基础上,设计出直观描述二维λ-t地址码的几何装置-二维光码柱面,直观便捷地描述二维码字结构,给出基于光码柱面的二维码码字相关性分析方法.并根据光码柱面,建立了在光码集本身导出二维码码字容量的分析理论.所得结果与直接引用电通信中的Johnson界得出的结果一致.因此,二维光码柱面给二维的相关性分析和码字容量研究提供了便捷有效的工具.
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| 关 键 词： | 光通信 光码分多址 二维地址码 光码柱面 码字相关性 码字容量 |
| 文章编号： | 1007-5461（2007）02-0231-05 |
| 收稿时间： | 2006-05-11 |
| 修稿时间： | 2006-06-19 |
Optical code-cylinder based analysis of correlation and carnality of 2-D signature codes for OCDMA |
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| LI Chuan-qi,SUN Xiao-han,CAI Jie,XIA Qing.Optical code-cylinder based analysis of correlation and carnality of 2-D signature codes for OCDMA[J].Chinese Journal of Quantum Electronics,2007,24(2):231-235. |
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| Authors: | LI Chuan-qi SUN Xiao-han CAI Jie XIA Qing |
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| Abstract: | The main method to enhance the system capacity of OCDMA networks is coding user's data in both time and spectral domains. Based on the 1-D optical code-pattern and code-hoop, a new geometrical device is designed, called optical code-cylinder, to denote the wavelength-time 2-D optical signature codes, from which the scheme of correlation checking of 2-D signature code family is given. Then based on the optical code-cylinder, the analytical theory of maximum system capacity of 2-D OCDMA system is established in detail. The results from code-cylinder are concordant with thoses of Johnson bound of correcting code. So, the code-cylinder method is useful and convenient tool for the performance analysis of 2-D signature code. |
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| Keywords: | optical communication optical code-division multiple access 2-dimensinal signature code optical code-cylinder correlation cardinality |
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