Telecommunications Engineering - Tapa blanda

Dunlop, J.; Smith, D. G.

 
9780412562709: Telecommunications Engineering
Tapa blanda
ISBN 10: 0412562707 ISBN 13: 9780412562709
Editorial: Nelson Thornes Ltd, 1994

Sinopsis

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.

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Reseña del editor

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.

Reseña del editor

This textbook provides wide ranging treatment of all the major telecommunication topics encountered on undergraduate programmes. Coverage includes signals and channels, analogue modulation theory, discrete signals, noise, HF transmission, antennas, microwave devices, telephony, TV, optical fibre communications, PSNs and satellite communications. This revised and updated edition is enhanced with further chapters on mobile communication systems and integrated services digital networks. There is also a new section on metropolitan area networks. The book is considered a seminal work in the area and the new edition strengthens its pre-eminent position. This book should be of interest to 2nd and 3rd year undergraduate in electrical and electronic engineering; applied physics and communications engineering.

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Editorial
Nelson Thornes Ltd
Año de publicación
1994
Idioma
Inglés
ISBN 10 
0412562707
ISBN 13 
9780412562709
Encuadernación
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Número de edición
3
Número de páginas
589
Contacto del fabricante
ROXIO
https://www.also.com/ec/cms5/en_6000/6000/index.jsp

Friedrich-Karl-Str. 9
Hamburg
22391
Alemania

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Editorial: CRC Press, 1994
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