Telecommunications Transmission Systems, Second Edition by Robert G. Winch.
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Chapter 1. Introduction
Chapter 2. Digital Multiplexing
Chapter 3. Signal Processing for Digital Communications
Chapter 4. The Microwave Link
Chapter 5. Digital Microwave Radio Systems and Measurements
Chapter 6. Satellite Communications
Chapter 7. Mobile Radio Communications
Chapter 8. Introduction to Fiber Optics
Chapter 9. Optical Fiber Transmission Systems
Chapter 10. Data Transmission and the Future Network
Preface: The telecommunications industry is proving to be a dynamic catalyst that is fueling the engines of economic growth in a manner the world has never previously experienced. The global implementation of digital telecommunications equipment has enabled the merger of the traditional telecommunications network designed for voice communications with data communications (computer information transfer). The resulting phenomenon we all know as “the Internet” is already changing the fabric of society and accelerating the globalization of commerce.
In today’s world, technical advancement is occurring so rapidly that it is very difficult for most engineers and technicians to stay current with the enormous amount of literature being produced in each discipline. Most of us can only hope to keep up with developments occurring in a relatively narrow field. Telecommunications is a vast technical subject and it is the intention of this book to consider the most essential transmission systems information and focus on some specific aspects in considerable detail.
This text is designed for the graduate engineer or senior technician. However, the amount of mathematics has been purposely reduced to a minimum and emphasis is placed on the underlying concepts that shape telecommunications transmission equipment together with the practical application of the theory. It is intended that the material discussed be a shortcut to experience, to give the practicing engineer/technician both a better understanding of how existing telecommunication systems have evolved and an insight into their future development.
To ensure international compatibility, telecommunications equipment must be designed to conform to international standards. The design and performance specifications of some of the latest equipment is described with an acute awareness of the international standards that have been created to ensure compatibility. In this respect I am indebted to the International Telecommunication Union (ITU) for granting me authorization to reproduce information of which the ITU is the copyright holder. Due to the limitations of space, only parts of the ITU Recommendations are given or in some instances only a reference is made to the original source. For further information, the complete ITU publications can be obtained from the ITU General Secretariat, Sales and Marketing Service, Place des Nations, CH-1211 Geneva 20, Switzerland; e-mail Internet : [email protected] itu.int.
The main themes of the book are multiplexing, microwave radio, satellite, optical fiber, wireless, and data communications. The term bandwidth, which relates to the amount of information that can pass through a system in a given time, is one of the most important parameters defining today’s networks. The bandwidth attributes or restrictions of each transmission medium are treated in great detail.
Each topic starts from fundamental principles and therefore the material is also of interest to managerial staff who are new to the subject or may not have had time to keep up with all the latest technical advances published in journals.
Chapter 1 is an introduction which sets the scene for the rest of the book by describing the configuration for each of the main telecommunication systems: microwave radio, satellite, optical fiber, and cellular radio.
Chapter 2 describes the digitization of voice signals and how voice, data, or video channels can be combined by the time division multiplexing technique. The new and very innovative synchronous digital hierarchy (SDH) is also described together with its benefits over the traditional plesiochronous digital hierarchy (PDH). A brief description of television digitization is included as a prelude to future HDTV.
Chapter 3 discusses modulation techniques which are evolving to enhance bandwidth efficiency and error control to improve performance. The spread spectrum technique is described, highlighting its potential benefits for mobile communication systems.
Chapter 4 describes how the theory behind microwave communications leads to the physical appearance of today’s systems. Attention is paid to the effects of terrain and atmospheric conditions on microwave propagation. The system performance is characterized and methods of enhancing performance are discussed.
Chapter 5 is a detailed study of digital microwave radio systems design and the measurements that are made to evaluate operational performance.
Chapter 6 traces the emergence of satellite communications from a fledgling telecom industry to a major player in the TV distribution and data networking businesses. The new global mobile phone systems using low and medium earth orbit satellites are also described.
Chapter 7 details the development of mobile radio (wireless) communications, with a comparison of the major systems presently in existence, namely, the digital TDMA (AMPS and PACS) and CDMA (IS-95) systems designed in North America, and the TDMA (GSM) system from Europe. Other wireless topics are discussed such as cordless telephones and data over wireless.
Chapters 8 and 9 give an overview of the evolution of fiber optics from the early step-index fiber communication systems up to soliton transmission and coherent detection systems. Chapter 8 emphasizes the characteristics of the fibers and components used in the systems, and Chapter 9 deals with systems design for various lengths of optical communication links, from short distance local area networks to transoceanic distances. Chapter 10 is a brief introduction to data communications, stating some of the international standards used to establish equipment compatibility and describing the basics of packet switching, LANs, and ISDN. The building blocks of the Internet are described and some of the networking bandwidth bottlenecks are highlighted, with possible solutions presented to overcome them.
I am grateful to authors, publishers, and companies who have granted permission to reproduce figures and photographs from previous publications. Finally, I cannot find adequate words to express my gratitude to my wife, Elizabeth, for her patience, dedication, preparation of figures, and expert proofreading of the manuscript, without which this project would not have been completed.
Robert G. Winch
ABOUT THE AUTHOR:
Robert G. Winch obtained a doctoral degree in microwave electronics at the University of Oxford in 1974. He subsequently worked as staff scientist for Teledyne Microwave, Inc., California on the design of microwave communications subsystems and components for defense and space applications. He held faculty positions at the University of the West Indies and the University of the Virgin Islands during which time he worked as a consultant to local and California-based companies on telecommunications and aerospace projects. He then moved to ITT and continued full time work on intra- and interisland optical fiber and microwave telecommunication links in the Caribbean.
In 1984, he became a full time employee of the International Telecommunication Union, a member organization of the United Nations, for whom he worked as a digital telecommunications expert for 11 years in an advisory capacity to governments of the international community. Areas of specialization include the design and implementation of transmission system projects involving optical fiber, digital microwave radio, wireless, satellite, and data communications technology. Dr. Winch is now an independent international consultant based in Oxford, England.
Telecommunications Transmission Systems, 2nd Edition by Robert G. Winch pdf.
⏩Author: Robert G. Winch
⏩Puplication Date: March 1, 1998
⏩Size: 4.97 MB
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