[1]侯奋飞,孙小菡.色散对光CDMA传输系统性能的影响[J].东南大学学报(自然科学版),2007,37(1):18-21.[doi:10.3969/j.issn.1001-0505.2007.01.005]
　Hou Fenfei,Sun Xiaohan.Impact of dispersion on the performance of optical CDMA transmission system[J].Journal of Southeast University (Natural Science Edition),2007,37(1):18-21.[doi:10.3969/j.issn.1001-0505.2007.01.005]
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色散对光CDMA传输系统性能的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第1期
页码:
18-21
栏目:
信息与通信工程
出版日期:
2007-01-20

文章信息/Info

Title:
Impact of dispersion on the performance of optical CDMA transmission system
作者:
侯奋飞1; 2;  孙小菡1
1 东南大学电子科学与工程学院, 南京 210096; 2 南京师范大学物理科学与技术学院, 南京 210046
Author(s):
Hou Fenfei1; 2;  Sun Xiaohan1
1 School of Electronics Science and Engineering, Southeast University, Nanjing 210096, China
2 School of Physics Science and Technology, Nanjing Normal University, Nanjing 210046, China
关键词:
光码分多址;  开关键控;  色度色散;  光误码率
Keywords:
optical code-division multiple-access;  on-off keying;  chromatic dispersion;  optical BER
分类号:
TN914
DOI:
10.3969/j.issn.1001-0505.2007.01.005
摘要:
基于耦合非线性薛定谔方程分析了光CDMA传输系统中光纤色度色散对传输性能的影响,给出了考虑色度色散系数r后光BER的表达式,使得对系统BER的理论分析更加有效.数值计算结果显示,r=0.4时7码片M-序列系统在10-9的BER时功率衰减4.8 dB; 并进一步表明,对功率衰减6 dB的31码片M-序列系统,当r=0.4 时,同时使用的用户不超过24个,而r=0.6时,使用的用户不超过20个.指出色度色散对单极性光码分多址系统性能的影响较大,在相同情况下,r越大,接入用户数越少.
Abstract:
The impact of fiber chromatic dispersion on the BER(bit error rate)performance of a direct sequence optical code-division multiple-access(COMA)system is analyzed based on the coupled nonlinear Schrødinger equation(CNLSE).The presented to evaluate considering the expression r of the chromatic dispersion, which will be good for the analysis of the BER. The numerical results show that the system suffers a power penalty of 4.8 dB corresponding to chromatic dispersion index r=0.4 for seven-chip M-sequence, at a BER of 10-9.It is further noticed that the number of simultaneous users are limited to 24 for r=0.4 and 20 for r=0.6, for 31-chip M-sequence,at 6 dB power penalty. The result presents that the performance of monopole code-division multiple-access system impacted by chromatic dispersion is the worst. It shows that the bigger the r, the less the user accessed under same conditions.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(60272048).
作者简介: 侯奋飞(1966—),男,博士生,houfenfei@njnu.edu.cn; 孙小菡(联系人),女,教授,博士生导师, xhsun@seu.edu.cn.
更新日期/Last Update: 2007-01-20