Telecommunications Engineering
Published on 14. May 2014
Book
Paperback/Softback
XIX, 508 pages
978-1-4615-8006-5 (ISBN)
Description
The influence of telecommunications has increased steadily since the introduc tion oftelegraphy, radio and telephony. Now, most of us are directly dependent on one or more of its many facets for the efficient execution of our work, at home, or in our leisure. Consequently, as a subject for study it has become more and more important, finding its way into a large range of higher education courses, given at a variety oflevels. For many students, telecommunications will be presented as an area of which they should be aware. The course they follow will include the essential features and principles of communicating by electromagnetic energy, without developing them to any great depth. For others, however, the subject is of more specialized interest; they will start with an overview course and proceed to specialize in some aspects at a later time. We have written our book with both types of student in mind. We have brought together a broader range of material than is usually found in one text, and we have tried to combine an analytical approach to important concepts with a descriptive account of system design. In several places we have stressed the approximate nature of analysis, and the need to exercise engineering judgement in its application. The intention has been to avoid too much detail, so that the text will stand on its own as a general undergraduate-level introduction, and it will also provide a strong foundation for those who will eventually develop more specialized interests.
More details
Language
English
Place of publication
Boston, MA
United States
Target group
Professional and scholarly
Research
Illustrations
40
40 s/w Abbildungen
Dimensions
Height: 235 mm
Width: 155 mm
ISBN-13
978-1-4615-8006-5 (9781461580065)
DOI
10.1007/978-1-4615-8004-1
Other editions
Additional editions
John Dunlop | D. Geoffrey Smith
Telecommunications Engineering
Book
09/1989
2nd Edition
Nelson Thornes Ltd
€85.55
Article exhausted; check for reprint
Content
1 Signals and channels.- 1.1 Introduction.- 1.2 The frequency and time domains.- 1.3 Continuous Fourier analysis.- 1.4 Odd and even functions.- 1.5 Waveform synthesis.- 1.6 The Fourier integral.- 1.7 Power and energy density spectrum.- 1.8 Signal transmission through linear systems.- 1.9 The impulse function.- 1.10 The discrete Fourier transform (DFT).- 1.11 Time domain analysis.- 1.12 Correlation functions.- 1.13 Information content of signals.- 1.14 Information transmission.- 1.15 Conclusion.- References.- Problems.- 2 Analogue modulation theory.- 2.1 Double sideband amplitude modulation (DSB-AM).- 2.2 Double sideband suppressed carrier amplitude modulation (DSB-SC-AM).- 2.3 Single sideband amplitude modulation (SSB-AM).- 2.4 Vestigial sideband amplitude modulation (VSB-AM).- 2.5 DSB-AM modulators.- 2.6 DSB-SC-AM modulators.- 2.7 SSB-AM modulators.- 2.8 VSB-AM modulators.- 2.9 DSB-AM detection.- 2.10 DSB-SC-AM detection.- 2.11 SSB-AM detection.- 2.12 VSB-AM detection.- 2.13 Economic factors affecting the choice of AM systems.- 2.14 Angle modulation.- 2.15 Phase modulation (PM).- 2.16 Frequency modulation (FM).- 2.17 Frequency modulators.- 2.18 Demodulation of a FM wave.- 2.19 Frequency division multiplex (FDM) transmission.- 2.20 Conclusion.- References.- Problems.- 3 Discrete signals.- 3.1 Sampling of continuous signals.- 3.2 Reconstruction of the continuous signal.- 3.3 Low-pass filtering of a sampled signal.- 3.4 Time division multiplex (TDM) transmission.- 3.5 Pulse code modulation (PCM).- 3.6 PCM line signals.- 3.7 Bandwidth requirements for PCM transmission.- 3.8 Synchronization of PCM links.- 3.9 Delta modulation.- 3.10 Differential PCM.- 3.11 Data communications.- 3.12 Spectral properties of data signals.- 3.13 Amplitude shift keying (ASK).- 3.14 Frequency shift keying (FSK).- 3.15 Phase shift keying (PSK).- 3.16 Practical data systems.- 3.17 Differential phase shift keying (DPSK).- 3.18 Advanced modulation methods.- 3.19 Conclusions.- References.- Problems.- 4 Noise in analogue communications systems.- 4.1 Introduction.- 4.2 Physical sources of noise.- 4.3 Noise properties of networks.- 4.4 Algebraic representation of band-limited noise.- 4.5 SNR characteristics of envelope detected DSB-AM.- 4.6 SNR characteristics of coherently detected DSB-AM.- 4.7 SNR characteristics of DSB-SC-AM.- 4.8 SNR characteristics of SSB-AM.- 4.9 SNR characteristics of FM.- 4.10 Pre-emphasis and de-emphasis.- 4.11 The FM capture (threshold) effect.- 4.12 Conclusion.- References.- Problems.- 5 Noise in digital communications systems.- 5.1 The amplitude distribution function of white noise.- 5.2 Statistical decision theory.- 5.3 Decision errors in PCM.- 5.4 Decision errors in carrier-modulated data signals.- 5.5 Matched filtering and correlation detection.- 5.6 Error detection and correction.- 5.7 Multiple decisions.- 5.8 Conclusion.- References.- Problems.- 6 High-frequency transmission lines.- 6.1 Voltage and current relationships on the line.- 6.2 Line parameters.- 6.3 Characteristic impedance.- 6.4 Reflection from the load.- 6.5 Reflection coefficient p.- 6.6 Sending-end impedance.- 6.7 Lines of low loss.- 6.8 Loss-less lines.- 6.9 Quarter-wave transformer.- 6.10 Stubs.- 6.11 Standing waves.- 6.12 Voltage standing wave ratio (VSWR).- 6.13 Impedance at a voltage minimum and at a voltage maximum.- 6.14 Load impedance on a loss-less line.- 6.15 Smith transmission line chart.- 6.16 Stub matching.- 6.17 Single-stub matching.- 6.18 Double-stub matching.- 6.19 Derivation of the Smith chart.- 6.20 Travelling waves on a loss-less line.- 6.21 Wave equation for a loss-less transmission line.- 6.22 Conclusion.- References.- Problems.- 7 Antennas.- 7.1 Radiation pattern (polar diagram).- 7.2 Lobes.- 7.3 Beamwidth.- 7.4 Antenna impedance and bandwidth.- 7.5 Gain.- 7.6 Field due to a filament of current.- 7.7 Induction field.- 7.8 Radiation field.- 7.9 Power radiated from a current element.- 7.10 Radiation pattern of a short dipole.- 7.11 Antenna arrays.- 7.12 Two-element array.- 7.13 Linear arrays.- 7.14 Pattern multiplication.- 7.15 Antenna matching.- 7.16 Parasitic elements.- 7.17 Microwave antennas.- 7.18 Parabolic reflector.- 7.19 Horn antennas.- 7.20 Dielectric lens.- 7.21 Radio wave propagation.- References.- Appendix 7.1: Field components produced by a short current element.- Problems.- 8 Active microwave devices.- 8.1 Klystron.- 8.2 Two-cavity klystron.- 8.3 Reflex klystron.- 8.4 Magnetron.- 8.5 Travelling-wave tube (TWT).- 8.6 Solid-state devices.- 8.7 Gunn diode.- 8.8 IMPATT diode.- 8.9 Field-effect transistors.- 8.10 Conclusion.- References.- 9 Passive microwave devices.- 9.1 Waveguides.- 9.2 Rectangular waveguide.- 9.3 Interference of two plane waves.- 9.4 Cut-off wavelength.- 9.5 Phase velocity.- 9.6 Group velocity.- 9.7 Rectangular waveguide modes.- 9.8 Field theory of propagation along a rectangular waveguide.- 9.9 Transverse electric (TE) modes.- 9.10 Transverse magnetic (TM) modes.- 9.11 Field equations for the fundamental TE10 mode.- 9.12 Attenuation in rectangular waveguide.- 9.13 Evanescent modes.- 9.14 Rectangular mode patterns.- 9.15 Circular waveguides.- 9.16 Circular waveguides (TE) modes.- 9.17 Circular mode cut-off frequency.- 9.18 Attenuation in circular waveguide.- 9.19 Rectangular cavity.- 9.20 Cavity Q - TE101 mode.- 9.21 Circular cavity.- 9.22 Rectangular waveguide components - TE10 mode.- 9.23 Waveguide - coaxial transformer.- 9.24 Attenuator.- 9.25 Directional coupler.- 9.26 Tee junctions.- 9.27 Wavemeter.- 9.28 Matched load.- 9.29 Short-circuit.- 9.30 Isolator.- 9.31 Microstrip.- References.- Problems.- 10 Telephony.- 10.1 Telephone traffic.- 10.2 Inter-arrival and call-holding times.- 10.3 Traffic variation.- 10.4 Busy hour.- 10.5 Lost-calls-cleared systems.- 10.6 Equations of state.- 10.7 Statistical equilibrium.- 10.8 State probability.- 10.9 Full-availability models.- 10.10 Erlang distribution: S ? N.- 10.11 Time congestion.- 10.12 Call congestion.- 10.13 Bernoulli distribution: S ? N.- 10.14 Engset distribution: S > N.- 10.15 Probability of occupancy of particular devices.- 10.16 Link systems.- 10.17 Probability of blocking.- 10.18 Delay system.- 10.19 Simulation.- 10.20 Switching and signalling.- 10.21 Types of signalling system.- 10.22 Voice-frequency signalling.- 10.23 Outband signalling.- 10.24 Switching networks.- 10.25 Basic analogue switching systems.- 10.26 Step-by-step.- 10.27 Common control.- 10.28 Multi-frequency signalling.- 10.29 Common-channel signalling.- 10.30 The telephone network.- 10.31 Numbering schemes.- 10.32 Routeing calls.- 10.33 Digital systems.- 10.34 Digital switching.- 10.35 Conclusion.- References.- Problems.- 11 Television systems.- 11.1 Introduction.- 11.2 Measurement of light and the response of the eye.- 11.3 The monochrome televison waveform.- 11.4 Bandwidth of a television waveform.- 11.5 Choice of number of lines.- 11.6 Synchronizing pulses.- 11.7 The television receiver.- 11.8 Colorimetry.- 11.9 Requirements of a colour television system.- 11.10 The PAL colour television system.- 11.11 Transmission of the chrominance signals.- 11.12 The transmitted PAL signal.- 11.13 Gamma correction.- 11.14 The NTSC chrominance signal.- 11.15 The PAL receiver.- 11.16 The SECAM system.- 11.17 Display devices and television cameras.- 11.18 Teledata.- 11.19 Teletext transmission.- 11.20 Viewdata.- 11.21 Conclusion.- References.- Problems.- 12 Optical fibre communications.- 12.1 Optical fibre.- 12.2 Stepped-index fibre.- 12.3 Skew rays.- 12.4 Modes.- 12.5 Graded-index fibre.- 12.6 Loss mechanisms.- 12.7 Absorption.- 12.8 Scatter.- 12.9 Radiation from bends.- 12.10 Single-mode fibre.- 12.11 Detectors.- 12.12 PIN diode.- 12.13 APD device.- 12.14 Speed of response and quantum efficiency.- 12.15 Reliability.- 12.16 Noise.- 12.17 Optical sources.- 12.18 Light emitting diodes (LEDs).- 12.19 Lasers.- 12.20 Communications systems.- 12.21 Conclusion.- References.- 13 Packet switched networks.- 13.1 Introduction.- 13.2 Wide area networks.- 13.3 The Poisson distribution.- 13.4 Scheduled access techniques.- 13.5 Random access techniques.- 13.6 Local area networks.- 13.7 The Ethernet local area network.- 13.8 The token bus.- 13.9 The token ring.- 13.10 Open Systems Interconnection reference model.- 13.11 The X25 communications protocol.- 13.12 Conclusions.- References.- Problems.- 14 Satellite communications.- 14.1 Introduction.- 14.2 Geostationary orbits.- 14.3 Angle from satellite to earth station.- 14.4 Satellite links.- 14.5 Antennas.- 14.6 Error coding.- 14.7 Interference and noise.- 14.8 Multi-access.- References.- Appendix 1 Four-figure Bessel functions.- Appendix 2 Useful trigonometric identities.- Appendix 3 Normal error function tables.