| OCDMA系统中变重光正交码的构造及误码率分析 |
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| 引用本文： | 周园园,张媛,乙万义,李传起.OCDMA系统中变重光正交码的构造及误码率分析[J].南京气象学院学报,2010(6):533-537. |
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| 作者姓名： | 周园园 张媛 乙万义 李传起 |
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| 作者单位： | 南京信息工程大学数理学院, 南京 210044;南京信息工程大学数理学院, 南京 210044;南京信息工程大学数理学院, 南京 210044;广西师范大学电子工程学院, 桂林 541012 |
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| 基金项目： | 江苏省高校自然科学基金面上项目(BK2008437);南京信息工程大学科研基金(20080287) |
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| 摘 要： | 变重光正交码是基于不同用户带有不同的QoS(Quality of Service)需求而提出的,由于它的码重不是固定值,使得其码字的容量较之常重光正交码有所增加.给出了变重光正交码的定义及其码字容量界,介绍了构造变重光正交码的一种方法,给出一些码字的构造结果,并对码重数不同的码字进行多址干扰误码率的仿真比较和理论分析.结果表明:在相同的码重数下,码重越大的误码率越小;而当码重数不同时,在相同的码重下,码重数大的误码率小.
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| 关 键 词： | 光码分多址 变重光正交码 误码率 |
| 收稿时间： | 2010/3/1 0:00:00 |
Structure and BER analysis of variable-weight optical orthogonal codes for OCDMA systems |
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| ZHOU Yuanyuan,ZHANG Yuan,YI Wanyi and LI Chuanqi.Structure and BER analysis of variable-weight optical orthogonal codes for OCDMA systems[J].Journal of Nanjing Institute of Meteorology,2010(6):533-537. |
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| Authors: | ZHOU Yuanyuan ZHANG Yuan YI Wanyi and LI Chuanqi |
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| Institution: | School of Mathematics and Physics, Nanjing University of Information Science & Technology, Nanjing 210044;School of Mathematics and Physics, Nanjing University of Information Science & Technology, Nanjing 210044;School of Mathematics and Physics, Nanjing University of Information Science & Technology, Nanjing 210044;College of Electronic Engineering, Guangxi Normal University, Guilin 541012 |
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| Abstract: | Variable-weight optical orthogonal codes(VW-OOC) are put forward to provide differentiated quality of service(QoS) for different users.Due to its non-fixed code weight,the VW-OOC is larger in capacity than constant OOC.In this paper,the definition and the bound on capacity of VW-OOC are given.The method of designing VW-OOC is presented,and the structure results of the proposed codes are given.In the end,the bit error rate(BER) of multi-user interference for different number of code weight is compared through emulation and theoretical analysis.Results show that the BER of larger code weight is smaller while the number of code weight is the same,and the BER of larger number of code weight is smaller while the code weight is the same. |
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| Keywords: | OCDMA variable-weightopticalorthogonalcodes biterrorrate |
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