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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2532 条记录，以下是2321-2330 订阅

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Comparison and classification of all-optical CDMA systems for future telecommunication networks

Comparison and classification of all-optical CDMA systems fo...

引用

conference on all-optical communication systems: architecture, control and network issues

作者： Iversen, K Hampicke, D TECH UNIV ILMENAU DEPT COMMUN & MEASUREMENTD-98684 ILMENAUGERMANY

ISBN: (纸本)0819419788

This paper shows the state of the art in fiber optical code-division multiple-access (CDMA). Recent work in this area for both, systems and sequences is reviewed and analyzed. For that purpose a classification of systems, corresponding to the manner of signal processing and a classification of known (0,1)-sequences are presented. It is shown that due to the limits by currently available device technology especially two techniques are promising for implementation in broadband telecommunication networks: spectral encoding with integrated optical filters and CDMA in combination with wavelength multiple access schemes. Further an overview about some important experiments in this field is given.

关键词： code division multiple access (CDMA) optical communication fiber-optic networks sequences

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Photonic switch size limitations imposed by phase noise from semiconductor optical amplifiers

Photonic switch size limitations imposed by phase noise from...

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conference on all-optical communication systems: architecture, control and network issues

作者： Pires, JJO Univ Tecn Lisboa DEPT ELECT & COMP ENGN INST SUPER TECN P-1096 LISBON PORTUGAL

ISBN: (纸本)0819419788

A possible way of realizing large optical space switches is by interconnecting multiple 2 X 2 switching elements based on integrated semiconductor optical amplifiers (SOAs). In this paper, the switch size limitations are examined, giving a special emphasis to the phase noise, originated by SOAs. Using a DPSK direct detection scheme and multiple optical filters within the switching network, it is shown that the phase noise becomes the most restrictive factor, preventing to connect more than 200 switching elements, for a bit rate in the gigabit/s range.

关键词： Switches Switching Interference (communication) Semiconductor optical amplifiers optical amplifiers optical components optical filters Receivers Signal attenuation Matrices

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Simplified tuned optical receivers for use in Lightwave optical Subcarrier Multiplex systems

Simplified tuned optical receivers for use in Lightwave Opti...

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conference on all-optical communication systems: architecture, control and network issues

作者： Greaves, SD Unwin, RT UNIV HUDDERSFIELD SCH ENGNCOMMUN RES GRPHUDDERSFIELDW YORKSHIREENGLAND

ISBN: (纸本)0819419788

In this paper we investigate the design and realization of broadband tee-tuned front-end optical receivers. The receivers will be implemented as a GaAs MMIC using the GEC/Marconi F20 foundry, the active devices are 0.5 micrometers gate-length GaAs MESFETs. Simple design equations are introduced that show the importance of the intrinsic noise parameters P, R and C, which are used to characterize the noise performance of such devices, as well as enabling initial values of tuning elements to be obtained. Finally measured results for a MMIC receiver designed are presented that confirm the expected noise performance as well as the validity of the design process.

关键词： Receivers Field effect transistors Gallium arsenide Lithium Cesium Telecommunications Chemical elements communication engineering networks optical communications

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Advances in fibre access systems design and application

Advances in fibre access systems design and application

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conference on all-optical communication systems: architecture, control and network issues

作者： Faulkner, D Stern, J James, K Cook, A Quayle, A BT LABS IPSWICH IP5 7RESUFFOLKENGLAND

ISBN: (纸本)0819419788

The future widescale deployment of broadband multiservice networks is dependent on an acceptable commercial relationship being achieved between new service revenues, operating cost savings and the network capital investment required. A new generation of broadband access networks is envisaged which is capable of both broadband and narrowband transmission, and can provide both broadcast and interactive services over a much larger coverage area than copper pair yet makes good use of existing copper pair infrastructure. To ensure that such networks emerge practically and are economically viable, requirements must be agreed and a wide market established. The aims of this paper are to draw attention to the benefits of networks with broadband and narrowband capability, to discuss the benefits of co-operation on requirements and to describe what has so far been achieved in the standards bodies. © 1995 SPIE.

关键词： access networks fibre systems broadband hybrid systems standardisation network architecture

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Object-oriented software for modelling optical access networks

Object-oriented software for modelling optical access networ...

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conference on all-optical communication systems: architecture, control and network issues

作者： Senior, JM Asumu, DE Redstall, M Mellis, J MANCHESTER METROPOLITAN UNIV DEPT ELECT & ELECTR ENGNCTR COMMUN NETWORKS RESMANCHESTER M1 5GDLANCSENGLAND

ISBN: (纸本)0819419788

This paper describes an object-oriented software system that can be used to predict the spectral performance of optical networks. The system can be used by the planners and designers of such networks to assess the spectral performance of existing or proposed optical networks. The software package combines the theoretical models developed in the course of a research programme with experimental data obtained from the devices used in the UK field trials of fibre in the local access network. Using this package, a planner or designer is able to construct networks on actual location maps and then obtain forward and return loss spectral characteristics on any paths throughout the network. Since the development of the system is based on object oriented technology, it is future-proofed to the extent that any changes in the technology of the local access network can readily be incorporated into the existing modelling process. © 1995 SPIE.

关键词： object-oriented software optical access networks network spectral loss communication systems network modelling subscriber loop performance analysis

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Clear channel strategies for a scalable wide-area network

Clear channel strategies for a scalable wide-area network

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conference on all-optical communication systems: architecture, control and network issues

作者： Jagannath, SV Kovacevic, M Acampora, AS COLUMBIA UNIV CTR TELECOMMUN RESEE DEPTNEW YORKNY 10027

ISBN: (纸本)0819419788

This paper studies the use of wavelength translation in different Clear Channel setup strategies in a scalable all-optical network. the network considered used a recursive grid architecture representing the 100 largest cities and constituting 561 access stations. As the network grows, the grid is subdivided in a recursive fashion to accommodate more nodes, making the network modular. The algorithm used for routing of the calls is distributed, dynamic, and scalable in the sense that the complexity of the algorithm grows slower than linear with the network size. The performance of wavelength translation with static and dynamic routing strategies is studied using simulation in terms of the blocking of incoming requests for Clear Channels. optical wavelength translation is provided in the network and it is shown that for the network considered, the improvement in performance is marginal. The Clear Channel blocking, with and without wavelength translation, is studied for different traffic patterns ranging from fully uniform traffic to a pattern exhibiting very strong communities of interest. The impact of wavelength translation is considered for these different traffic patters. The Clear Channel setup strategies along with the architecture are all scalable and hence are applicable to very large networks.

关键词： network architectures networks optical fibers Switches Data conversion Electronics optical amplifiers optical networks Standards development Telecommunications

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Practical aspects of optically integrated communication/sensor networking

Practical aspects of optically integrated communication/sens...

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conference on all-optical communication systems: architecture, control and network issues

作者： Pervez, A S BANK UNIV SCH ELECT ELECTR & INFORMAT ENGNLONDON SE1 0AAENGLAND

ISBN: (纸本)0819419788

The concept of optically integrated networking is experimentally verified. The operational procedures of the integrated system and methods for signal separation and detection are explained. The degree of degradation of each traffic as a result of the spectral overlapping is analyzed and power penalties evaluated. It is verified that the communication traffic may be recovered with negligible power penalty. The optimum solution in terms of the signal to noise ratio for the sensor traffic is shown to be the whitened matched filter detection. However, this solution results in an unacceptable degree of intersymbol interference (ISI). Thus, a zero forcing ISI solution is also presented and the system performance is re-evaluated taking both the noise and ISI into account.

关键词： optically integrated networking extended LANs digital optical sensor networks

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The deployment of private WDM networks

The deployment of private WDM networks

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conference on all-optical communication systems: architecture, control and network issues

作者： Cahn, RS IBM CORP THOMAS J WATSON RES CTRYORKTOWN HTSNY 10598

ISBN: (纸本)0819419788

Technology that debuted in the public switched network has been moving, over recent years, into private networks. While there is no need to justify Wavelength Division Multiplexing (WDM) in the public switched network, which makes good use of higher capacity equipment, the cost effectiveness of private WDM networks is not at all clear. In this paper, we investigate of deploying WDM with Asynchronous Transfer Mode (ATM) networks. The WDM networks provide the physical layer;the ATM networks form a logical layer, using light paths from the WDM network. There are 4 different benefits to be derived from such an arrangement, including the possibility of reduced network cost. An algorithm for the design of logical networks is developed. This algorithm has been incorporated in the Intrepid network design tool. © 1995 SPIE.

关键词： WDM ATM logical network MENTOR

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Compressed HDTV over the optical fibre network using PPM CDMA

Compressed HDTV over the optical fibre network using PPM CDM...

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conference on all-optical communication systems: architecture, control and network issues

作者： Elmirghani, JMH NORTHUMBRIA UNIV DEPT ELECT ELECTR ENGN & PHYSNEWCASTLE TYNE NE1 8STTYNE & WEARENGLAND

ISBN: (纸本)0819419788

A hybrid pulse position modulation code division multiple access (PPM-CDMA) scheme is proposed and studied in the context of optical fibre video transmission and distribution. With cornpressed HDTV video rates of 5-20 Mbit/s and with the current optical fibre technology, the strategy is shown to be capable of accommodating up to 50 video channels. Original results are presented for the bit rate demonstrating that there exists an optimum PPM-CDMA order that maximises the achievable bit rate at a given number of channels. Results are also presented for the digital video channels crosstalk which takes the form of false alarm errors caused by the OOC crosscorrelations. The optimum system operating parameters that minimise these errors are specified. © 1995 SPIE.

关键词： Code division multiple access

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Demonstration of multi-gigabit/s services over a 20 channel WDM wavelength-routed all-optical metropolitan-area network

Demonstration of multi-gigabit/s services over a 20 channel ...

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conference on all-optical communication systems: architecture, control and network issues

作者： Stevens, ML Hemenway, BR Castagnozzi, DM Parikh, SA Marquis, D Swanson, EA Kaminow, IP Koren, U Dragone, C Koch, T Thomas, RE Ozveren, C Grella, E MIT LINCOLN LABLEXINGTONMA 02173

ISBN: (纸本)0819419788

An experimental all-optical, wavelength-routed network testbed has been constructed in the Boston metropolitan area. [1]. The network has 20 optical channels, spaced by 50 GHz and provides dedicated circuit-switched wide-band service at user defined modulation formats and rates up to 10 Gbps, and timeslotted WDM services for medium and low-rate users [2,3]. We are now characterizing the deployed network which spans over 87 km interconnecting four all-optical local-area networks in Littleton, Lexington, and Cambridge Massachusetts. We discuss wavelength sharing and reuse, local broadcast, routing, multi-cast and multi-hop connections at 1.244, 2.488, and 10 Gbps. We present the system design and the performance (e.g. BER and cross-talk) of local-broadcast, metropolitan-area-routed and broadcast transmission modes. © 1995 SPIE.

关键词： all-optical networks WDM FDM TDM wavelength-routed time-slotted wideband highspeed

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