Telecommunications Engineering
Nelson Thornes Ltd (Publisher)
3rd Edition
Published on 20. October 1994
Book
Paperback/Softback
XXII, 589 pages
978-0-412-56270-9 (ISBN)
Article exhausted; check for reprint
Description
Telecommunication engineering is concerned with the transmission of in formation between two distant points. Intuitively we may say that a signal contains information if it teils us something we did not already know. This definition is too imprecise for telecommunications studies, and we shall devote a section oftbis chapter to a formal description ofinformation. For the present it is sufficient to say that a signal that contains information varies in an unpredictable or random manner. We have thus specified a primary characteristic of the signals in telecommunications systems; they are random in nature. These random signals can be broadly subdivided into discrete signals that have a fixed number of possible values, and continuous signals that have any value between given Iimits. Whichever type of signal we deal with, the tele communication system that it uses can be represented by the generalized model of Fig. 1. 1. The centrat feature of this model is the transmission medium or channel. Some examples of channels are coaxial cables, radio links, optical fibres and ultrasonic transmission through solids and liquids. It is clear from these examples that the characteristics of channels can vary widely. The common feature of all channels, however, is that they modify or distort the waveform of the transmitted signal. In some cases the distortion can be so severe that the signal becomes totally unrecognizable. In many instances it is possible to minimize distortion by careful choice of the transmitted signal waveform.
More details
Edition
3., rd ed. 1994
Language
English
Place of publication
Oxford
United Kingdom
Publishing group
Oxford University Press
Target group
Professional and scholarly
Research
Edition type
Revised edition
Illustrations
71
71 s/w Abbildungen
71 black & white illustrations, biography
Dimensions
Height: 24.6 cm
Width: 18.9 cm
Weight
1181 gr
ISBN-13
978-0-412-56270-9 (9780412562709)
DOI
10.1007/978-1-4899-2929-7
Schweitzer Classification
Other editions
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John Dunlop
Telecommunications Engineering
Book
10/1994
3rd Edition
Nelson Thornes Ltd
€81.10
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Previous edition

John Dunlop | D. Geoffrey Smith
Telecommunications Engineering
Book
09/1989
2nd Edition
Nelson Thornes Ltd
€85.55
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Content
1 Signals and channels.- 2 Analogue modulation theory.- 3 Discrete signals.- 4 Noise in analogue communications systems.- 5 Noise in digital communications systems.- 6 High-frequency transmission lines.- 7 Antennas.- 8 Active microwave devices.- 9 Passive microwave devices.- 10 Telephony.- 11 Television systems.- 12 Optical fibre communications.- 13 Packet switched networks.- 14 Satellite communications.- 15 Mobile communication systems.- Appendix A Four-figure Bessel functions.- Appendix B Useful trigonometric identities.- Appendix C Normal error function.- Appendix D Blocked-calls-cleared (Erlang B).