pls give details of fiber antennas for free space communicTION ....etc

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WDM Concept and Components


Why WDM?

Capacity upgrade of existing fiber networks (without adding fibers)

Transparency: Each optical channel can carry any transmission format (different asynchronous bit rates, analog or digital)

Scalability Buy and install equipment for additional demand as needed

Wavelength routing and switching: Wavelength is used as another dimension to time and space

WDM, CWDM and DWDM

WDM technology uses multiple wavelengths to transmit info ....etc

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Abstract
Most device drivers have one ulterior motive and one target to achieve - deliver the maximum using the minimum. No matter how stable or feature rich a device driver might be, if it cannot perform in terms of high throughput and low CPU utilization, it is as good as any other run of the mill driver.The objective of this topic is to use the thinking out of the box concept and expose techniques, which go beyond just good programming principles to get that extra edge which can put your next driver into the elite group of high perform ....etc

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http://seminarsprojects.net/Thread-radio-over-fibre-technology-for-broadband-wireless-communication-systems

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The need for high bandwidth in today's IP-based Internet, and the promise of WDM to provide this high capacity, is fueling the current investigations on IP-over-
WDM networks. Internet growth not only requires providing immense bandwidth but also triggers the need for providing the guarantees with respect to quality of service, security, and fault tolerance. Currently telecommunication networks use SONET/SDH for transmission, multiplexing and protection. It is implemented over WDM. As a result we are using the IP over SONET/SDH ....etc

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Presented by:
Bart Lannoo, Didier Colle, Mario Pickavet, Piet Demeester

Abstract

Broadband access in a train environment is a topic which requires still a lot of research. It is especially the combination of fast moving users and high data rates which is still difficult to realize. In our proposed network architecture, we will make use of a reconfigurable Radio-over-Fiber network, which implements a moveable cell concept. By means of a case study, we will evaluate the total concept.

Introduction[/b ....etc

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http://seminarsprojects.net/Thread-radio-over-fiber-technique-for-multimedia-train-environment ....etc

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In optical WDM networks, since each lightpath can carry a huge mount of traffic, failures may seriously damage the end-user applications.As a result, fault-tolerance is an important issue in these networks. The primary path is the light path which carries traffic during normal operation. in case of a failure, the traffic is rerouted on a backup path. a reliable and fault-tolerant routing algorithm is discussed in this paper for establishing primary and backup path. load balancing is used to establish the primary path. In this method, the pag ....etc

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