| 一种基于扩展素数码和单重合序列的二维光正交码EPC/OCS |
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| 引用本文： | 吉建华,徐铭,张志朋,杨淑雯.一种基于扩展素数码和单重合序列的二维光正交码EPC/OCS[J].光子学报,2007,36(7):1285-1288. |
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| 作者姓名： | 吉建华 徐铭 张志朋 杨淑雯 |
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| 作者单位： | 深圳大学,新技术研究中心,深圳,518060 |
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| 基金项目： | 国家自然科学基金(60132040)，广东省自然科学基金(530102804300855)，深圳大学基金(200634)资助 |
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| 摘 要： | 以扩展素数码(EPC)作为时间扩频伪随机序列，单重合序列(OCS)作为波长跳频伪随机序列，构造了一种新的二维光正交码EPC/OCS，并分析了码字的互相关性能.与修正素数跳频码MPHC相比，EPC/OCS的波长数并不局限于素数，可以是任意整数，不仅构造灵活，而且可充分利用MW OCDMA系统的有效波长数.当系统的有效波长数大于某个素数时，EPC/OCS不仅码字容量大于MPHC，而且互相关性能也有所改善.理论分析表明，EPC/OCS可降低MW OCDMA系统误码率.
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| 关 键 词： | 光码分多址 二维光正交码 素数码 扩展素数码 单重合序列 |
| 文章编号： | 1004-4213（2007）07-1285-4 |
| 收稿时间： | 2005-12-28 |
| 修稿时间： | 2005-12-28 |
A New Family of Two-Dimensional Optical Orthogonal Codes EPC/OCS Based on Extend Prime Code and One-Coincidence Sequence |
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| JI Jian-hua,XU Ming,ZHANG Zhi-peng,YANG Shu-wen.A New Family of Two-Dimensional Optical Orthogonal Codes EPC/OCS Based on Extend Prime Code and One-Coincidence Sequence[J].Acta Photonica Sinica,2007,36(7):1285-1288. |
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| Authors: | JI Jian-hua XU Ming ZHANG Zhi-peng YANG Shu-wen |
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| Institution: | Advanced Technology Research Centre of Shenzhen University, Shenzhen 518060,China |
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| Abstract: | A new two-dimensional optical orthogonal codes named EPC/OCS is firstly constructed,using EPC(extend prime code) for time spreading and OCS(one-coincidence sequence) for wavelength hopping.Cross-correlation performance of EPC/OCS is analyzed.Compared with MPHC,the number of wavelengths for EPC/OCS is not limited to prime number.EPC/OCS can be constructed flexibly,and also can use available wavelengths adequately.When the number of wavelengths is larger than prime number,EPC/OCS not only has larger code cardinality,but also has better cross-correlation performance.Theoretical analysis shows that EPC/OCS can reduce the bit error rate(BER) of MW OCDMA networks. |
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| Keywords: | Optical code division multiple access(OCDMA) Two-dimensional optical orthogonal codes Prime code Extend prime code One-coincidence sequence |
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