Mcgraw.Hill.Telecommunications.Demystified.pdf

(2427 KB) Pobierz
LICENSE INFORMATION
This is a single-user version of this eBook.
It may not be copied or distributed.
Unauthorized reproduction or distribution of this eBook
may result in severe civil and criminal penalties.
Telecommunications
Demystified
A Streamlined Course in Digital Communications
(and some Analog) for EE Students and
Practicing Engineers
by Carl Nassar
Eagle Rock, Virginia
www.LLH-Publishing.com
Copyright © 2001 by LLH Technology Publishing
All rights reserved. No part of this book may be reproduced, in any
form or means whatsoever, without written permission of the pub-
lisher. While every precaution has been taken in the preparation of
this book, the publisher and author assume no responsibility for errors
or omissions. Neither is any liability assumed for damages resulting
from the use of information contained herein.
Printed in the United States of America.
ISBN 1-878707-77-9 (eBook)
LLH Technology Publishing and HighText Publications are trademarks
of Lewis Lewis & Helms LLC, 3578 Old Rail Road, Eagle Rock, VA,
24085
Contents
Click the page number to go to that page.
Foreword xv
What’s on the CD-ROM? xvii
CHAPTER 1
Introducing Telecommunications ........................................................ 1
1.1 Communication Systems ................................................................... 1
1.1.1 Definition ................................................................................... 1
1.1.2 The Parts of a Communication System ................................. 2
1.1.3 An Example of a Communication System ............................. 2
1.2 Telecommunication Systems ............................................................. 3
1.2.1 Definition ................................................................................... 3
1.2.2 Four Examples and an Erratic History Lesson .................... 4
1.3 Analog and Digital Communication Systems .................................. 6
1.3.1 Some Introductory Definitions ............................................... 6
1.3.2 Definitions ................................................................................. 7
1.3.3 And Digital Became the Favorite ........................................... 8
1.3.4 Making It Digital ...................................................................... 9
1.4 Congrats and Conclusions ............................................................... 10
CHAPTER 2
Telecommunication Networks .......................................................... 13
2.1 Telecommunication Network Basics .............................................. 13
2.1.1 Connecting People with Telephones .................................... 13
2.1.2 Connecting More People, Farther Apart ............................. 14
2.1.3 Multiplexing—An Alternative to a Lot of Wire ................... 16
iii
Telecommunications Demystified
2.2 POTS: Plain Old Telephone System ............................................... 19
2.2.1 Local Calls ............................................................................... 19
2.2.2 Long Distance Calls ............................................................... 20
2.2.3 The Signals Sent from Switching Center to
Switching Center ................................................................... 21
2.3 Communication Channels................................................................ 24
2.3.1 Transmission Lines (Wires) ................................................. 24
2.3.2 Terrestrial Microwave ........................................................... 26
2.3.3 Satellite Connections .............................................................. 28
2.3.4 Fiber-optic Links ..................................................................... 29
2.4 Data Communication Networks ...................................................... 31
2.5 Mobile Communications .................................................................. 33
2.6 Local Area Networks (LANs) .......................................................... 35
2.7 Conclusion ......................................................................................... 37
CHAPTER 3
A Review of Some Important Math, Stats, and Systems ....................... 39
3.1 Random Variables ............................................................................. 39
3.1.1 Definitions ................................................................................ 39
3.1.2 The Distribution Function: One Way to Describe x ........... 39
3.1.3 The Density Function: A Second Way to Describe x .......... 40
3.1.4 The Mean and the Variance .................................................. 41
3.1.5 Multiple Random Variables ................................................... 44
3.2 Random Processes ........................................................................... 45
3.2.1 A Definition ............................................................................. 45
3.2.2 Expressing Yourself, or a Complete Statistical Description .. 47
3.2.3 Expressing Some of Yourself, or a Partial Description ...... 47
3.2.4 And in Telecommunications … ............................................. 48
3.3 Signals and Systems: A Quick Peek ............................................... 50
3.3.1 A Few Signals .......................................................................... 50
3.3.2 Another Way to Represent a Signal:
The Fourier Transform .......................................................... 51
3.3.3 Bandwidth ............................................................................... 53
3.3.4 A Linear Time Invariant (LTI) System ................................ 55
3.3.5 Some Special Linear Time Invariant (LTI) Systems .......... 56
3.4 Onward ............................................................................................... 58
iv

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin