检索结果-南通市图书馆

Control of soliton interactions by use of super-Gaussian sliding-frequency filters

Chinese Optics Letters 2008年第7期6卷 476-478页

作者：何影记田晋平周国生薛文瑞肖燕汪河洲 School of Electronics and Information Guangdong Polytechnic Normal UniversityGuangzhou 510665 2 State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-Sen UniversityGuangzhou 510275 Department of Electronics and Information Technology and State Key Subjects of Optics Shanxi UniversityTaiyuan 030006 State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen UniversityGuangzhou 510275

We derived the theoretical results of soliton interactions in optical fiber with super-Gaussian sliding-frequency filters. The results demonstrate that the interactions between optical fiber solitons can be effectively suppressed by super-Gaussian sliding-frequency filters. And the results also show that the super-Gaussian filter with sliding is more effective in suppressing soliton interactions than that without sliding.

关键词： Fibers Flow interactions Optical fibers Optical materials Solitons trellis codes Wave filters

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Diffraction properties of four-petal Gaussian beams in uniaxially anisotropic crystal

引用

Chinese Optics Letters 2008年第10期6卷 779-781页

作者：唐斌金铱蒋美萍江兴方 School of Mathematics and Physics Jiangsu Polytechnic UniversityChangzhou 213164

Propagation properties of polarized anisotropic crystals were investigated four-petal Gaussian beams along the optical axis of uniaxially Based on the paraxially vectorial theory of beam propagation analytic expressions of the diffraction light field larization properties of the diffracted four-petal were obtained. The effects of the anisotropy on the po- Gaussian beams have also been explained by numerical method. The results elucidate that the linear polarization state and the symmetry of the incident beams cannot be kept during propagation in anisotropic crystals.

关键词： Anisotropy Crystal symmetry Crystallography Crystals Diffraction Fiber lasers Gaussian noise (electronic) Light Polarization Powders trellis codes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nonlinear Turbo codes For Higher-Order Modulations

Nonlinear Turbo Codes For Higher-Order Modulations

引用

2008 IEEE International Conference on Communications(ICC 2008)

作者： Miguel Griot Andres I.Vila Casado Richard Wesel Dept.of Electrical Engineering University of CaliforniaLos AngelesCA 90095

Parallel concatenated trellis coded modulation （PCTCM） has been traditionally designed using parallel concatenated convolutional codes with a bits-to-symbol mapper. However,this paper shows that for higher-order modulations using linear codes is too restrictive. Parallel Concatenated Nonlinear trellis Coded Modulation （PC-NLTCM） that directly assigns constel-lation points as output-labels to the branches of the trellis can outperform PC-TCM. Simulation results are shown for a 2 bits/s/Hz 16-state nonlinear turbo code with 8PSK. This code is less than 0.43 dB away from the Shannon limit at a BER = 10 5 with an interleaver length of 10000 bits,and outperforms previous published linear turbo code by around 0.2 dB. This paper also provides an extension of Benedetto’s uniform interleaver analysis for nonlinear constituent codes,which accurately predicts the BER of the PC-NLTCM at high SNR.

关键词： Channel coding information rates turbo codes nonlinear codes PSK trellis codes parallel concatenated trellis codes

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

CDMA communication system with trellis coding and orthogonal signaling

CDMA communication system with trellis coding and orthogonal...

引用

1996 International Conference on Communication Technology

作者： Li Xing Ming Hu Jian Dong Zhang Ping Beijing University of Posts and Telecommunications

ISBN: (纸本)0780329163

＜正＞In this paper,we discuss the application ot trellis coding technique in the CDMA system where orthogonat signaling is *** approach is to construct the trellis codes over the set of biorthogonal sequences.A general analysis is *** compared the analysis with computer *** results show that the trellis coded CDMA system outperforms the corresponding tmcoded system.

关键词： pseudonoise codes trellis coding orthogonal signaling CDMA communication system trellis codes biorthogonal sequences computer simulation trellis coded CDMA system direct sequence spread spectrum uncoded DS/SSMA system

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：