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Microwave Line of Sight Link Engineering, by Pablo Angueira, Juan Romo
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A comprehensive guide to the design, implementation, and operation of line of sight microwave link systems
The microwave Line of Sight (LOS) transport network of any cellular operator requires at least as much planning effort as the cellular infrastructure itself. The knowledge behind this design has been kept private by most companies and has not been easy to find. Microwave Line of Sight Link Engineering solves this dilemma. It provides the latest revisions to ITU reports and recommendations, which are not only key to successful design but have changed dramatically in recent years. These include the methodologies related to quality criteria, which the authors address and explain in depth.
Combining relevant theory with practical recommendations for such critical planning decisions as frequency band selection, radio channel arrangements, site selection, antenna installation, and equipment choice, this one-stop primer:
- Describes the procedure for designing a frequency plan and a channel arrangement structure according to ITU current standards, illustrated with specific application examples
- Offers analytical examples that illustrate the specifics of calculations and provide order of magnitude for parameters and design factors
- Presents case studies that describe real-life projects, putting together the puzzle pieces necessary when facing a real design created from scratch
Microwave Line of Sight Link Engineering is an indispensable resource for radio engineers who need to understand international standards associated with LOS microwave links. It is also extremely valuable for students approaching the topic for the first time.
- Sales Rank: #2907714 in eBooks
- Published on: 2012-07-25
- Released on: 2012-07-25
- Format: Kindle eBook
Review
“This practical book provides design and implementation guidelines for LOS (Line of Sight) Microwave Radio Links, which are a technological necessity in the telecommunications industry, offering readers ample case studies and ways to apply and adhere to industry standards.”� (ITbriefing.net, 11 September 2012)
From the Back Cover
A comprehensive guide to the design, implementation, and operation of line of sight microwave link systems
The microwave Line of Sight (LOS) transport network of any cellular operator requires at least as much planning effort as the cellular infrastructure itself. The knowledge behind this design has been kept private by most companies and has not been easy to find. Microwave Line of Sight Link Engineering solves this dilemma. It provides the latest revisions to ITU reports and recommendations, which are not only key to successful design but have changed dramatically in recent years. These include the methodologies related to quality criteria, which the authors address and explain in depth.
Combining relevant theory with practical recommendations for such critical planning decisions as frequency band selection, radio channel arrangements, site selection, antenna installation, and equipment choice, this one-stop primer:
- Describes the procedure for designing a frequency plan and a channel arrangement structure according to ITU current standards, illustrated with specific application examples
- Offers analytical examples that illustrate the specifics of calculations and provide order of magnitude for parameters and design factors
- Presents case studies that describe real-life projects, putting together the puzzle pieces necessary when facing a real design created from scratch
Microwave Line of Sight Link Engineering is an indispensable resource for radio engineers who need to understand international standards associated with LOS microwave links. It is also extremely valuable for students approaching the topic for the first time.
About the Author
PABLO ANGUEIRA, PhD, is an Associate Professor in the Department of Communication Engineering of the University of the Basque Country UPV/EHU. He has been involved in radio communications research and teaching activities for more than fifteen years. He is author of several contributions to the ITU-R WP3 and WP6 groups as well as many journal and international conference papers. He is Associate Editor of the IEEE Transactions on Broadcasting journal.
JUAN ANTONIO ROMO, PhD, is an Associate Professor teaching fixed, mobile, and satellite radio systems in the Department of Communication Engineering of the University of the Basque Country UPV/EHU. He has twenty-five years' experience in diverse areas of radio communications, in both manufacturing and network operations.
Most helpful customer reviews
1 of 1 people found the following review helpful.
An excellent read
By F.Perez Fontan
This is a very up-to-date book for direct use by practicing engineers involved in planning, sizing and deploying radio transmission systems. But the book is also of great value in electrical engineering graduate courses and to other engineers dealing at some point with propagation effects.
The book mainly relies on ITU-R recommendations containing models for all impairments found in terrestrial fixed radio links. I have always found it difficult to navigate through the large number of ITU-R documents where one recommendation uses another and so on. This book gives you a very clear roadmap to ITU material which, unless you are very familiar with it, is difficult to use.
The book provides a clear picture of the role and position that radio transmission systems have inside the various telecommunication networks, it already acknowledges the use of transmission streams other than PHS and SDH multiplexing, including systems transmitting ATM, Ethernet, or other data flows.
The book separates the conceptual explanation of the various propagation mechanisms from the available propagation models for quantifying availability and error performance. I found this a very good approach, helping the reader learn first about the phenomena and their causes, while leaving for later the mostly very involved models currently available which, in many cases, are empirical or statistical in nature given the complexity of the various phenomena.
I think the book covers all the issues affecting the planning of radio links from the specification of the quality requirements necessary when inserted in a telecommunication network to the various link related issues: required path clearance, antenna gain, countermeasures, e.g. diversity, equalization, ... up to the final verification of the initial quality objectives and bringing to service.
As a professor of electrical engineering, I particularly appreciated the complete worked out examples at the end of the book which further help in understanding the various models described in the book.
In summary, an excellent read.
0 of 0 people found the following review helpful.
Good practical book for students and link designers
By Mike
This well written book approaches the subject in a way that a good engineer will find easy to follow. It does not overburden the reader with unnecessary derivations of equations like some text books do, rather it explains the points in a narrative style and then presents equations as required for link design. It is also refreshingly free of jargon and acronyms and contains many high quality diagrams and plots.
The book itself starts with a review of fixed links, what they are and how they have developed and in particular why things are as they are due to the evolution of technology and the challenges of propagation. The first chapter covers pretty much the entire field from data formats through network topologies and link budgets to spectrum management. The following chapters then cover the detail, starting with a quick review of propagation. This chapter could have been longer but maybe as this is my field, I am biased and in any case, much more detailed propagation planning is presented in later chapters. Chapter 3 covers frequency planing concisely and comprehensively. Chapter 4 covers the technology, and it is nice to see basic points that are often missed have been included, e.g. modulation and antennas. If there is a criticism this chapter of over 70 pages could have be split into several shorter ones. Chapter 5 covers performance objectives, something I am less familiar with but I round it easy to follow and a useful reference. Chapter 6 - link path engineering basically contains advice on how to make sure a path is line of sight (using modern computer techniques rather than having going out and make a survey) and if it is line of sight, if there are likely to be issues with diffraction and multipath. Chapter 7 covers the ITU-R recommendations which enable the engineer to assess performance impairments due to the atmosphere. It is now slightly out of date as many recommendations referred to have been updated since publication, but the basics are the same. The reader would be advised to download the latest ITU-R recommendations from the website once they have understood the principles in this book. The final chapters are about putting the knowledge gained from previous chapters together. The engineers in us will possibly read these first and look at earlier chapters where a subject is new to us.
All in all, it is a good book covering the field comprehensively.
.
0 of 0 people found the following review helpful.
Good, up-to-date book for microwave radio path design
By Dane E. Ericksen
First, disclosure: The publisher offered me a free copy of this text if I would agree to read it and post a review to Amazon.com. Since I design microwave links as part of my job as a consulting engineer, that sounded like a fair deal and I accepted. The book arrived a few days later.
As mentioned, I am a consulting engineer, a P.E., and I design radio and TV stations, including the microwave links that broadcasters need to support their operations. If it's RF above 50 MHz or so, I do it. So the opportunity to add a new textbook on microwave engineering to my technical library was attractive, and, who knows, maybe I could learn a few things. I may be an old dog, but I am not adverse to learning new tricks.
Microwave Line of Sight Link Engineering is just under 400 pages. It has nine chapters and a 40-page appendix of practical examples. The book has a distinctive non-U.S. Federal Communications Commission (FCC) flavor, citing International Telecommunication Union (ITU) standards extensively. I was a bit puzzled by this until seeing the design examples in the appendix, with geographic coordinates placing the links in South America. Not that there is anything wrong with this: RF propagation doesn't care about international boundaries.
The book is black & white, but the graphics are excellent. I learned that a graphical representation of a microwave link's path budget is called a Hypsogram, and that the Fresnel zone radii that have to be considered to ensure adequate path clearances actually have the transmit and receive dishes at the foci of the Fresnel volume. Since that volume is highly elliptical the foci are very near to the ends of the ellipse, and so most diagrams don't bother to show that detail. The Fresnel zone clearance equations are the same, and ones I recognized right away, but this was an interesting detail that I had not been aware of until reading Microwave LoS Link Engineering.
The chapter I found most helpful was Chapter 4, which discusses digital modulation from 4-QAM (QPSK) through 516-QAM (which would make me nervous for even an engineered RF path with lots of fade margin); higher level QAMs are pretty fragile signals. Great for pushing through fiber optic or coaxial cables, but in my view iffy for anything except the most robust of microwave paths. The Figure 4.19 depiction of adaptive modulation is the best graphic I have seen anywhere demonstrating the concept. And, in the U.S., the FCC has only recently decided to routinely allow adaptive modulation (it's a path efficiency issue, and one that can unfortunately be abused).
This text is a nice addition to my technical library, and an excellent resource for sorting through the multitude of ITU recommendations. Although those recommendations are generally not binding for microwave links in the United States, which instead are subject to FCC regulations, it was good to now have a convenient reference for those documents.
This would be a good text for an undergraduate EE course on microwave engineering, or for an IT professional getting dragged into doing "just a couple" of short microwave hops between buildings, or cell site backhaul links. Mr. Romo and Mr. Angueira get a "well done" and my thumbs up positive recommendation for their book.
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