共查询到18条相似文献,搜索用时 375 毫秒
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为了提高光传输系统数据信息的机密性与安全性,开展了光传输系统物理层全光加/解密技术的理论分析,设计了全光AB逻辑实验方案,通过结构相同的两全光AB逻辑门输出信号的耦合,实验实现了对速率为10Gb/s的明文光信号的全光加密。 相似文献
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针对光传输系统单波长信号全光加密的应用需求,基于流密码体制开展了光传输系统物理层全光加密技术的理论分析,设计了基于SOA-XGM(半导体光放大器-交叉增益调制)的全光A逻辑门的实验方案,并在实验室搭建了实验系统。实现了速率为10Gbit/s的A逻辑处理,分析了探测光信号功率、泵浦光信号功率和SOA注入电流等主要参数对逻辑门输出信号质量的影响,实现了明文光信号的全光加密。 相似文献
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针对光传输系统单波长信号全光加密的应用需求,基于流密码体制开展了光传输系统物理层全光加密技术的理论分析,设计了基于 SOA-XGM(半导体光放大器-交叉增益调制)的全光 A?B 逻辑门的实验方案,并在实验室搭建了实验系统。实现了速率为10 Gbit/s 的 A?B 逻辑处理,分析了探测光信号功率、泵浦光信号功率和 SOA 注入电流等主要参数对逻辑门输出信号质量的影响,实现了明文光信号的全光加密。 相似文献
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为了提高通信系统的数据吞吐量,增加系统集成度,在IEEE 802.3ae标准的基础上,对万兆以太网技术进行了研究并实现。万兆以太网技术是基于FPGA实现的,FPGA完成的主要工作包括:完成与上层软件的指令和数据交互、数据的组帧/解帧、与物理层的接口管理等。物理层发送端主要完成数据对齐、变速并加扰、并串转换等工作,将串行数据发送给光电转换模块,接收端正好相反。经过万兆以太网标准仪器测试,传输速率达到了10 Gb/s,大大提高了系统间数据传输的速度和效率,简化了系统结构。 相似文献
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研制了符合IEEE802.3ae万兆以太网10GBASE-R标准物理层编码子层转换芯片,该转换芯片采用单片FPGA进行10GBASE-R标准中万兆以太网16比特接口(XSBI)与10Gb介质无关接口(XGMII)的相互转换,实现了物理层编码子层(PCS)的全部功能,并在万兆以太网物理层传输实验系统中进行了验证。 相似文献
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文章基于现有光纤收发器的现状和工作机理,介绍一种满足千兆位以太网应用的超小型光纤收发器的设计架构,通过可测试性设计,采用直插式RJ-45公头连接器、小尺寸低功耗物理层转换器方案和光电转换方案,显著减小产品的尺寸,非常利于客户端采用高密度组装方式和即插即用的实际应用需求。详细描述各单元的测试系统和测试内容,以及网络测试系统架构,并附上相应测试结果,针对一些问题进行总结,给出优化的方向。 相似文献
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Hyung-Rok Lee Moon-Sang Hwang Bong-Joon Lee Young-Deok Kim Dohwan Oh Jaeha Kim Sang-Hyun Lee Deog-Kyoon Jeong Kim W. 《Solid-State Circuits, IEEE Journal of》2005,40(11):2148-2158
This paper describes the design and the implementation of a fully integrated 10 Gb Ethernet transceiver in a 0.13-/spl mu/m CMOS process using only a 1.2 V supply. A coarse control algorithm that combines a voltage range monitoring circuit with a frequency lock detector provides a robust operation against process, voltage, and temperature (PVT) variations for a VCO with a ring oscillator. With the use of a blind oversampling DPLL architecture, four channels of XAUI transceivers can share a single PLL, eliminating the clock synchronization problem between channels. Also, the total number of clock domains for the entire chip is reduced to three, making the integration of the XAUI with the 10G transceiver much simpler. The test chip consumes 898 mW from a 1.2 V supply. 相似文献
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红外光学系统在军事、航空航天、民用等领域应用越来越广,系统面临的外界环境复杂多变。只用光学分析软件来评估系统性能的传统方法不仅无法综合考虑不同材料间耦合影响,也不能较为准确地描述热物理梯度场,因此对结果的精确性分析略显不足,而光机热集成分析是综合多物理场作用的有效方法,涵盖了光学、机械、热学三个方向对系统性能的影响因素。通过研究Zernike多项式拟合算法,编制了学科间的数据转换程序,实现了分析模块间的数据传输,并在热不敏红外系统的设计过程中采用光机热集成分析方法得到高低温工况下的光学系统传递函数,为指导系统设计改进、提高系统性能提供了有力的理论依据。 相似文献
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This paper proposes a new layered transport network architecture on which the WDM optical path network can be effectively created. The optical path network will play a key role in the development of the transport network that will realize the bandwidth-abundant B-ISDN. This paper extends the layered transport network architecture described in ITU-T Recommendation G.803 which is applied in existing SDH networks. First, we elucidate an application example of WDM optical path networks. Next, we propose a new layered architecture for WDM-based transport networks that retains maximum commonality with the layered architectures developed for existing B-ISDN networks. The proposed architecture is composed of circuit layer networks, electrical path layer networks, optical layer networks, and physical media (fiber) networks. The optical layer is divided into an optical path layer and an optical section layer. The optical path layer accommodates electrical paths. Optical section layer networks are divided into optical multiplex section (OMS) layer networks and optical repeater section (ORS) layer networks. The OMS layer network is concerned with the end-to-end transfer of information between locations transferring or terminating optical paths, whereas the ORS layer is concerned with the transfer of information between individual optical repeaters. Finally, a detailed functional block model of WDM optical path networks, the function allocation of each layer, and an optical transport module (OTM) are developed 相似文献
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论OFDM-PON与WDM-PON 总被引:1,自引:0,他引:1
论述正交频分复用无源光网(OFDM-PON)与波分复用无源光网(WDM-PON)的联系和区别,指出WDM-PON实际上是一种光接入网的物理层技术,它只有和别的媒质访问控制(MAC)技术结合起来才能完成数据通信系统和网络的功能.而OFDM-PON是工作于正交频分多址(OFDMA) MAC技术的光接入网,它的光网络单元(O... 相似文献
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Tada Y. Kobayashi Y. Yamabayashi Y. Matsuoka S. Hagimoto K. 《Selected Areas in Communications, IEEE Journal on》1996,14(5):914-922
Photonic networks based on wavelength division multiplexing (WDM) and optical path technologies are expected to realize flexible, transparent, and cost-effective transport networks with a large transmission capacity. This paper explores the design framework of photonic transport networks taking into consideration the operation administration and maintenance (OA&M) functions required for the successful introduction of WDM systems based on the optical path concept. From the view point of network maintenance, clear distinction is made between the optical path layer and the optical section layer to facilitate accurate and smooth failure localization. The digital multiplexing span between physical multiplexing interfaces at the end-to-end digital nodes should have the same maintenance span as the corresponding optical path. We argue that cooperative maintenance by OA&M functions at both the digital and optical layers can be a practical way of network supervision. A supervisory (SV) signal transfer method and a configuration that is suitable for the terrestrial trunk network are also indicated. As an example, a practical SV system design methodology and an actual procedure developed for a single channel optical transmission system based on optical in-line amplifiers are introduced. Furthermore, application of the developed SV system and network restoration schemes is discussed for future WDM-based photonic networks. The OA&M aspects introduced will be valuable for creating future photonic network systems 相似文献