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xvi Preface • Includes additional and revised homework problems. • Includes suggestions for obtaining the latest information on applications and standards by using the appropriate keyword queries on internet search engines, such as Google. • Continues the emphasis on MATLAB computer solutions to problems. This approach of using computer solutions is very important in training new communication engineers. This is one of the very few books that includes the actual electronic files for MATLAB solutions (available for free downloading from the internet). This is done so that the reader does not have to spend days in error-prone typing of lines of computer code that are listed in a textbook. • Updates all MATLAB files to run on Version R2010b. • Extends list of Answers to Selected Problems at the end of the book, with MATLAB solutions if appropriate. Many of the homework problems are marked with a personal computer symbol, . This indicates that MATLAB computer solutions are available for this problem. Homework problems are found at the end of each chapter. Complete solutions for those marked with a ★, approximately 1/3, are found in the Student Solutions Manual, available for free download at www.pearsonhighered.com/couch. Student M-files are also available for download. Complete solutions for all problems, including the computer solution problems, are given in the Instructor Solutions Manual (available only to instructors from Pearson/Prentice Hall). These manuals include Acrobat pdf files for the written solutions. Also, for the problems with computer solutions, MATLAB M files are given. Instructor’s should contact their local Pearson rep for access. This book is an outgrowth of my teaching at the University of Florida and is tempered by my experiences as an amateur radio operator (K4GWQ). I believe that the reader will not understand the technical material unless he or she works some homework problems. Consequently, over 550 problems have been included. Some of them are easy, so that the beginning student will not become frustrated, and some are difficult enough to challenge the more advanced students. All of the problems are designed to provoke thought about, and understanding of, communication systems. I appreciate the help of the many people who have contributed to this book and the very helpful comments that have been provided by the many reviewers over the years. In particular, I thank K. R. Rao, University of Texas, Arlington; Jitendra J. Tugnait, Auburn University; John F. McDonald, Rensselaer Polytechnic Institute; Bruce A. Ferguson, Rose- Hulman Institute of Technology; Ladimer S. Nagurney, University of Hartford; Jeffrey Carruthers, Boston University; and Hen-Geul Yeh, California State University, Long Beach. I also appreciate the help of my colleagues at the University of Florida. I thank my wife, Dr. Margaret Couch, who typed the original and revised manuscripts and has proofread all page proofs. LEON W. COUCH,II Gainesville, Florida couch@ufl.edu
Page 2: Abbreviations AC ADC ADM AM ANSI AP
Page 6: DIGITAL AND ANALOG COMMUNICATION SY
Page 10: CONTENTS PREFACE LIST OF SYMBOLS xi
Page 14: Contents v 2-8 Discrete Fourier Tra
Page 18: Contents vii 4-16 Transmitters and
Page 22: Contents ix 6-10 Appendix: Proof of
Page 26: Contents xi 8-11 Wireless Data Netw
Page 30: PREFACE Continuing the tradition of
Page 34: Preface xv THE PRACTICAL APPLICATIO
Page 40: xviii List of Symbols B T transmiss
Page 44: xx List of Symbols u 11 covariance
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20 Introduction Chap. 1 In analog s
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24 Introduction Chap. 1 Constraint
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26 Introduction Chap. 1 Code Interl
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28 Introduction Chap. 1 where B is
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30 Introduction Chap. 1 When a conv
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32 Introduction Chap. 1 1-5 A cellu
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C h a p t e r SIGNALS AND SPECTRA C
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36 Signals and Spectra Chap. 2 w(t)
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38 Signals and Spectra Chap. 2 For
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40 Signals and Spectra Chap. 2 V dc
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52 Signals and Spectra Chap. 2 TABL
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54 Signals and Spectra Chap. 2 Exam
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60 Signals and Spectra Chap. 2 Usin
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62 Signals and Spectra Chap. 2 t w
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64 Signals and Spectra Chap. 2 TABL
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66 Signals and Spectra Chap. 2 wher
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68 Signals and Spectra Chap. 2 Orth
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70 Signals and Spectra Chap. 2 obta
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72 Signals and Spectra Chap. 2 2. I
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76 Signals and Spectra Chap. 2 PROO
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78 Signals and Spectra Chap. 2 w(t)
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80 Signals and Spectra Chap. 2 PROO
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82 Signals and Spectra Chap. 2 Inpu
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88 Signals and Spectra Chap. 2 0 dB
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90 Signals and Spectra Chap. 2 Band
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92 Signals and Spectra Chap. 2 f s
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94 Signals and Spectra Chap. 2 w s
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96 Signals and Spectra Chap. 2 W(f)
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98 Signals and Spectra Chap. 2 MATL
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100 Signals and Spectra Chap. 2 aga
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102 Signals and Spectra Chap. 2 TAB
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104 Signals and Spectra Chap. 2 We
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106 Signals and Spectra Chap. 2 5 T
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108 Signals and Spectra Chap. 2 A =
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110 Signals and Spectra Chap. 2 the
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112 Signals and Spectra Chap. 2 rep
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114 Signals and Spectra Chap. 2 Sol
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116 Signals and Spectra Chap. 2 Sol
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118 Signals and Spectra Chap. 2 v(t
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120 w(t) Signals and Spectra Chap.
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122 Signals and Spectra Chap. 2 2-3
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124 Signals and Spectra Chap. 2 ★
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126 Signals and Spectra Chap. 2 2-6
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128 Signals and Spectra Chap. 2 0.0
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ƒ ƒ ƒ ƒ 130 Signals and Spectra
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C h a p t e r BASEBAND PULSE AND DI
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134 Baseband Pulse and Digital Sign
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( 192 Baseband Pulse and Digital Si
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196 DPCM transmitter Analog input s
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214 24 DS-0 inputs, 64 kb/s each (1
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216 TABLE 3-9 SPECIFICATIONS FOR T-
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238 Bandpass Signaling Principles a
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242 TABLE 4-1 COMPLEX ENVELOPE FUNC
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314 AM, FM, and Digital Modulated S
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320 TABLE 5-1 AM BROADCAST STATION
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338 TABLE 5-2 FOUR-PLACE VALUES OF
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TABLE 5-6 V.32 MODEM STANDARD Item
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386 Baseband signal processing RF c
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C h a p t e r RANDOM PROCESSES AND
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416 Random Processes and Spectral A
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C h a p t e r PERFORMANCE OF COMMUN
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494 Performance of Communication Sy
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508 Upper channel Receiver r(t)=s(t
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518 DPSK signal plus noise in Bandp
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520 QPSK signal plus noise (data ra
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TABLE 7-1 COMPARISON OF DIGITALSIGN
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- f c f c f 566 Performance of Comm
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570 Wire and Wireless Communication
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576 Tip (green wire) POTS line card
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TABLE 8-2 CAPACITY OF PUBLIC-SWITCH
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ƒ ƒ 640 Wire and Wireless Communi
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Channel Broadcast On-the-Air Channe
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Channel Broadcast On-the-Air Channe
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670 Mathematical Techniques, Identi
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678 A-10 TABULATION OF Q (z) Mathem
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A p p e n d i x PROBABILITY AND RAN
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682 Probability and Random Variable
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684 which is identical to Eq. (B-4)
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TABLE B-1 SOME DISTRIBUTIONS AND TH
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ƒ ƒ 704 Probability and Random Va
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710 3. F(a 1 , a 2 ,..., a N ) Prob
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724 Using MATLAB Appendix C Of cour
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726 Using MATLAB Appendix C 6. The
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728 References AT&T, FT-2000 OC-48
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730 References COUCH, L. W., Digita
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732 References HAMMING, R. W., “E
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734 References LIN, D. W., C. CHEN,
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736 References PRITCHARD, W. L., an
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738 References UNGERBOECK, G., “C
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740 Answers to Selected Problems Ch
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742 Answers to Selected Problems 2
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744 Answers to Selected Problems 5-
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746 Answers to Selected Problems h
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748 Index Amplitude shift keying (A
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750 Index Coding/codes (cont.) chan
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752 Index Effective isotropic radia
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754 Index In-phase components, 638
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756 Index Multilevel signaling, 157
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758 Index Process/processing (cont.
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760 Index Signal/signaling (cont.)
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762 Index Two-level data, 165 Two-q
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TABLE 2-2 SOME FOURIER TRANSFORM PA
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