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Download Microwave Transmission Networks, Second Edition by Harvey Lehpamer PDF

By Harvey Lehpamer

Up to date assurance of microwave transmission networksfully revised for the newest north american and itu criteria, microwave transmission networks, moment version covers all phases of terrestrial point-to-point microwave community build-out, from making plans and feasibility stories to procedure deployment and trying out. This definitive quantity is punctiliously up-to-date with new info, together with information at the effect of ethernet and ip communications on microwave hyperlinks. necessary formulation for fixing microwave design-related difficulties are contained during this sensible source. learn the way to:plan, layout, and construct microwave point-to-point networksdetermine community skill, dimensions, structure, price range, schedules, and workforce requirementsunderstand microwave hyperlink engineeringcalculate loss/attention, fading and fade margins, and hyperlink caliber and availabilityperform interference analysisdetermine, procure, and set up required and gear systemsmanage the microwave undertaking and its regulatory concerns, moral dilemmas, logistical matters, and organizational challengestest the microwave approach all through each degree of improvement and deploymenthandle upkeep, troubleshooting, and enhancements

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Extra info for Microwave Transmission Networks, Second Edition

Example text

In the case of hardware failure, protection will kick in, and the operator will have sufficient time (which may be days or weeks) to order replacement parts from the supplier. In addition, the ring configuration could provide protection against hardware failures as well, so additional hardware protection might not be required. This is something that transmission engineers have to decide, and the decision will be based on both technical and budgetary requirements. It is also important to remember the distinction between terms like performance, availability, quality, and so on.

They only vary in strength as the current varies, with the magnetic flux of the H-field coming out from the antenna and going back in, and the E-field emanating outward. Maxwell also proved that beyond this quasi-static near field, both the E-fields and H-fields at a certain distance detached themselves from the conductor and propagated into free space as a combined wave, moving at the speed of light with a constant ratio of E/H = 120π or 377Ω. The point in which this happens is called the far field.

Transmission Network Fundamentals 17 As real-time applications continue to increase, network outages will become more visible, and service providers will have to react or lose customers to other carriers. For IP networks to support demanding real-time applications and converged legacy networks, carriers must overcome a number of obstacles; poor router reliability, lack of link protection, disruptive operations, slow convergence time, and multiservice support are just some of the challenges. Even though Ethernet/IP provides significantly cheaper bandwidth, in terms of cost per bit, than legacy ATM and TDM, the technologies so far have rarely been used for transport in mobile access networks, in part due to the lack of sufficient QoS and resilience to guarantee the required service level.

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