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卜爱琴 《天津职业院校联合学报》2014,(2):80-83,101
OTN是以波分复用技术为基础、在光层组织网络的传送网,是下一代的骨干传送网。文章阐述了光传送网的概念、特点、复用和映射原理、OTN设备,并对OTN光传送网的应用进行了简要的介绍。 相似文献
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Wang Hong-yu 《浙江大学学报(A卷英文版)》2000,1(3):254-263
In this paper, the author proposes a new virtual topology, referred to as fully connected cubic network (FCCN), for the wavelength
division multiplexing (WDM) multihop lightwave network. The FCCN is a multi-level, highly scalable and modular architecture.
Anm level FCCN is constructed by “fully connecting” 8 (m−1)-FCCNs. The FCCN satisfies very well all the design requirements for WDM lightwave networks. The nodal degree is no more
than four, and independent of the network size. Both the diameter and the average hop distance are in the order of
. Owing to the highly scalable structure, the routing algorithm proposed in this paper is very simple to implement. Wavelengths
reuse technique can be applied with high efficiency to FCCN.
Project supported by Zhejiang University Cao Guangbiao Technology Development Funding(413C01302*29808) 相似文献
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张瑜 《黄冈师范学院学报》2008,28(3):59-63
密集波分复用（DWDM）技术是一种比较先进的光纤通信技术,并且相对成熟。传输网络的容量和质量已越来越受到各个运营商的重视,采用密集波分复用技术组建传送网己成共识。如何最大限度地利用现有传输资源,以较少的投入完成对传输网络的改造和优化,己成为运营商非常关心的问题。本文阐述了DWDM技术的产生背景与发展状况,基于通信网络宽带危机的事实,论述了应用DWDM技术建设宽带基础传送网的必要性,介绍了DWDM技术特点和设备的系统结构、DWDM的网络结构、网络设计和优化,在此基础上,给出了广州韶关电信网的DWDM的设计组网方案．并对其进行了测试、开通和维护。 相似文献
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波长变换技术是组成全光分组交换网中的重要技术之一,而当前比较成熟的基于半导体光放大器的波长转换技术在传输速率、信号格式、波长转换通道数和灵活性上还存在缺陷,不利于今后高速大容量光网络的发展。本文提出了基于周期极化掺氧化镁铌酸锂（PPMgLN）晶体的非线性波长转换方案,该方案采用I型准相位匹配（QPM）技术实现宽带倍频（SHG）、和频（SFG）和差频（DFG）,再通过级联二阶倍频差频（cSHG/DFG）或级联二阶和频差频（cSFG/DFG）波长转换机制,实现全光通信波长转换。在全光网络中,该方案能够很好地解决波长竞争、传输格式达到完全透明、降低网络阻塞率、提高网络传输速率等问题。 相似文献
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提出一种光纤ＣＤＭＡ系统的双极码编解码方案．该方案综合利用光波分复用ＷＤＭ与现有的光纤ＣＤＭＡ技术,把已经较为成熟的射频ＣＤＭＡ的双极码编码技术移植到光纤ＣＤＭＡ系统中,以达到改善光纤ＣＤＭＡ地址码相关性能的目的 相似文献
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郭一博 《四川职业技术学院学报》2011,21(1):120-122
波分复用是长距离通信系统的技术之一,具有单信道速率快、通信容量大等优势。本文采用波分复用技术组建了16个信道,单信道速率12.3Gbit/s,总通信容量达到196.8Gbit/s的超大容量长距离越洋光纤通信系统。本文先对波分复用系统的关键技术做了介绍,包括光放大技术、色散补偿技术以及非线性效应的抑制技术。然后用OptiSystem软件搭建了通信系统,对系统的各个重要部分做了介绍,并通过对参数的分析,得到了理想的结果,验证了本文所设计的系统的可行性和正确性。 相似文献
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张元清 《重庆第二师范学院学报》2005,18(3):29-31
介绍了光波分复用器的工作原理,典型干涉膜型两波长光波分复用器器件结构原理及光学薄膜特性.通过测量插入损耗和回波损耗等参数的大小分析了光波分复用器的性能,用该方法测试常用的干涉膜型两波长光波分复用器性能达到了理论要求和使用要求. 相似文献
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方捻 《上海大学学报(英文版)》2006,10(4):373-374
All optical network (AON) is a hot topic in recentstudies of optical fiber communications . Key tech-niques in AONinclude optical switching/routing,opti-cal cross connection ( OXC) , all optical wavelengthconversion (AOWC) ,all optical buffering,etc. Opti… 相似文献
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介绍了光纤通信1 550 nm波段全介质带通滤光片的设计原理、制备工艺和研制过程,获得了可供实用的光纤通信滤波器件.实验测试结果表明:所设计并研制的3腔和4腔具有0.8 nm波长间隔的窄带通滤波片,具有很好的带通透射光谱特性,其中心波长、通带宽度、通带纹波、峰值插入损耗等主要技术指标,以及温度稳定性等,均能满足光纤通信密集波分复用(D-WDM)系统应用的要求.另外,具有20 nm带宽的粗波分复用(C-WDM)滤波片,也具有符合工业应用的带通透射光谱性能. 相似文献
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In this paper, the wavelength-routed WDM network, was analyzed for the dynamic case where the arrival of anycast requests was modeled by a state-dependent Poisson process. The equilibrium analysis was also given with the UWNC algorithm. 相似文献
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把波分复用技术应用于计算机光互连网络 ,通过分析波长和网络路由之间的关系 ,提出了采用波长作为 IP寻径“网络地址”,实现网络间路由寻径的新概念 ,使网络具有非常好的可扩展性 .介绍了实验室利用双波长环网构成机群系统验证波长路由的工作进展及关键单元设计 .性能测试表明 ,光互连技术的应用 ,是解决网络带宽不足的理想技术 . 相似文献
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This paper introduces architectures of two types optical packet-switched metropolitan area networks and their media access control protocols.We have designed ralated network simulation systems.With these simulation systems,the characteristics and performanceof the two MANs can be achieved. 相似文献
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Multiband orthogonal frequency division multiplexing (MB-OFDM) ultra wide-band (UWB) is a novel wireless communication technology. It has many advantages and is being actively researhed. In this study, we constructed and implemented a simulation model of UWB communication systems in Simulink. We found the MB-OFDM UWB system has the best performance in distance between 4 m to 10 m without the line-of-sight requirement. 相似文献
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徐显日 《洛阳师范学院学报》2013,(11):41-43
介绍了一种利用大规模专用集成电路以及大规模可编程逻辑器件的多路数字视频光纤传输系统方案.系统基于时分复用和光波分复用技术,在一根光纤中同时传输四路视频和反向数据控制信号.经实验表明,系统可实现多路视频的实时传输,可运用于远程视频监控等多个领域,是一种实用方案. 相似文献
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Partial transmit sequence(PTS)is a promising technique for peak-to-average power ratio(PAPR)reduction in orthogonal frequency division multiplexing(OFDM).While in optimal PTS,an exhaustive search for all combinations of phase factor sequences is required,this results in huge computation.In this paper,by introducing the orthogonal design,a phase factor sequences algorithm is proposed.The algorithm uses orthogonal table to gencrate phase factor sequences,and the regular PAPR computation result is then followed by the parameter estimation.The simulation result shows that the proposed algorithm reduces the computation notably and obtains a good PAPR performance approaching the optimal PTS. 相似文献
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The space sheet for a solar array structure is large in dimension, and flexible to induce complex distortion. It is difficult to measure the distortion. A large-scale flexible test prototype system is built for sheet structure vibration monitoring based on the vibration information of the solar array in space. The system provides an intelligent test method for flexible space structure with embedded sensors and non-visualization reinstruction. Multiple fiber Bragg grating （FBG） sensors are packaged and embedded into the structure with spatial division multiplexing （SDM） and wavelength division multiplexing （WDM）. The sensor interrogator distinguishes wavelength shifts that can be turned into curvature of the curve. The structure shape is reconstructed based on the curvature information and the arc-length, and then displayed. The experiment shows that the system has a high FBG sensitivity. The reconstruction algorithm is fast with high precision. The system has great potential for use in health monitoring of the space sheet structure. 相似文献
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The chromatic dispersion( CD) degrades themodulation-phase relationships of lightwave signals,reducing information-carrying capacity through pulse-broadening in digital networks and distortion in analogsystems[1,2]. The widespread use of dense wavelengthd… 相似文献
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由于传统卫星通信中射频链路的不足以及光通信在容量、抗干扰及保密等多方面的优势,利用激光作为链路的卫星光通信受到了广泛关注.介绍了国内外卫星光通信的发展现状,依据空间信息网络协议体系结构,从星间激光链路、信道编码和网络层三方面出发,初步探讨了卫星光网络体系结构,研究了其关键技术,提出了动态虚拓扑的路由选择算法和波分复用波长分配算法. 相似文献