Telecommunications Engineering

by D. G. Smith (Author), J. Dunlop (Author)

• Used

  Paperback
  1994

  $6.41

  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.

• Used

  Paperback
  1994

  $3.49

  Since the publication of the second edition of this highly acclaimed textbook, telecommunications has progressed at a rapid rate. Major advances continue to occur in mobile communications and broadband digital networks and services, sophisticated signal processing techniques are prevalent at increasingly higher bit rates, and digital systems are widespread. These developments need to be addressed in a textbook that bridges the gap in the current knowledge and teachings of telecommunications engineering.
  
  Telecommunications Engineering, 3rd Edition offers an introduction to the major telecommunications topics by combining an analytical approach to important concepts with a descriptive account of systems design. Completely updated and expanded, this third edition includes substantial material on integrated services digital networks, mobile communications systems, metropolitan area networks, and more.
  
  What's New in the 3rd Edition
  
• New chapter on mobile communications covering first generation analog and second generation digital systems
  
• Expanded chapter on non-linear coding of voice waveforms for PCM
  
• New section on NICAM
  
• Updated chapter on the transient performance of the phase locked loop
  
• Revised chapter on recent major developments in satellite television
  
• New introduction to coding techniques for burst errors
  
• Extended chapter on ISDN and broadband digital communications
  
  Supplemented with worked problems, numerous illustrations, and extensive references to more advanced material, this textbook provides a solid foundation for undergraduate students of electrical, electronic, and telecommunications engineering.