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Sec. 5–7 Frequency-Division Multiplexing and FM Stereo 349 m 1 (t) Subcarrier modulator f SC1 s SC1 (t) m 2 (t) Subcarrier modulator f SC2 s SC2 (t) m b (t) Transmitter f c s(t)=FDM m N (t) Subcarrier modulator f SCN s SCN (t) Composite baseband modulating signal (a) Transmitter |M b (f)| f SC1 0 f SC1 f SC2 f filter, Demodulator, f SC1 SC2 SC2 SCN f SCN Bandpass filter, f SCN B SC1 B SC2 B SCN B (b) Spectrum of Composite Baseband Signal Composite s SC1 (t) m 1 (t) baseband Bandpass f SC1 signal Bandpass filter, f s SC2 (t) Demodulator, f m 2 (t) s(t) Main receiver s SCN (t) Demodulator, f m N (t) (c) Receiver Figure 5–17 FDM system. or offices. The SCA FM subcarrier frequency is usually 67 kHz, although this frequency is not specified by FCC rules. Moreover, up to four SCA subcarriers are permitted by the FCC, and each may carry either data or analog audio material. Using a data rate just under 1,200 bs on a 57-kHz subcarrier, the radio broadcast data system (RBDC) provides auxiliary text information—such as station call letters, the titles of programs, the names of musical artists, and auto traffic congestion reports.
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Abbreviations AC ADC ADM AM ANSI AP
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DIGITAL AND ANALOG COMMUNICATION SY
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CONTENTS PREFACE LIST OF SYMBOLS xi
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Contents v 2-8 Discrete Fourier Tra
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Contents vii 4-16 Transmitters and
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Contents ix 6-10 Appendix: Proof of
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Contents xi 8-11 Wireless Data Netw
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PREFACE Continuing the tradition of
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Preface xv THE PRACTICAL APPLICATIO
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LIST OF SYMBOLS There are not enoug
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List of Symbols xix l an integer n
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List of Symbols xxi DEFINED FUNCTIO
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C h a p t e r INTRODUCTION CHAPTER
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Sec. 1-1 Historical Perspective 3 s
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Sec. 1-2 Digital and Analog Sources
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Sec. 1-4 Organization of the Book 7
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Sec. 1-6 Block Diagram of a Communi
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Sec. 1-7 Frequency Allocations 11 T
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Sec. 1-8 Propagation of Electromagn
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Sec. 1-8 Propagation of Electromagn
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Sec. 1-9 Information Measure 17 In
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Sec. 1-10 Channel Capacity and Idea
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Sec. 1-11 Coding 21 Transmitter Noi
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Sec. 1-11 Coding 23 Convolutional C
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Sec. 1-11 Coding 25 0 1 0 (00) Path
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Sec. 1-11 Coding 27 10 -1 P e = Pro
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Sec. 1-11 Coding 29 TABLE 1-4 CODIN
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Problems 31 Solution: Using Eq. (1-
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Problems 33 1-17 Using the definiti
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Sec. 2-1 Properties of Signals and
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Sec. 2-2 Fourier Transform and Spec
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( ( Sec. 2-2 Fourier Transform and
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` Sec. 2-2 Fourier Transform and Sp
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Sec. 2-3 Power Spectral Density and
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Sec. 2-3 Power Spectral Density and
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Sec. 2-4 Orthogonal Series Represen
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Sec. 2-4 Orthogonal Series Represen
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Sec. 2-5 Fourier Series 71 2-5 FOUR
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Sec. 2-5 Fourier Series 73 where th
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Sec. 2-5 Fourier Series 75 Imaginar
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Sec. 2-5 Fourier Series 77 But the
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Sec. 2-5 Fourier Series 79 The spec
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Sec. 2-5 Fourier Series 81 The PSD
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Sec. 2-6 Review of Linear Systems 8
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Sec. 2-7 Bandlimited Signals and No
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Sec. 2-8 Discrete Fourier Transform
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Sec. 2-9 Bandwidth of Signals 105 N
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Sec. 2-9 Bandwidth of Signals 107 m
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Sec. 2-9 Bandwidth of Signals 109 m
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Sec. 2-9 Bandwidth of Signals 111 w
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Sec. 2-11 Study-Aid Examples 113 2-
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Sec. 2-11 Study-Aid Examples 115 SA
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Problems 117 b. Given the RC low-pa
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Problems 119 Sinusoidal current sou
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Problems 121 w(t) A -t 2 -t 1 t 1 t
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Problems 123 where A 1 , A 2 , v1,
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Problems 125 2-57 Show that the qua
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Problems 127 ★ 2-70 Assume that v
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ƒ ƒ Problems 129 2-82 The signal
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Problems 131 2-97 Given the low-pas
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Sec. 3-2 Pulse Amplitude Modulation
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Sec. 3-3 Pulse Code Modulation 141
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PCM transmitter (analog-to-digital
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Sec. 3-4 Digital Signaling 155 wher
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Sec. 3-4 Digital Signaling 157 Eq.
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Q Sec. 3-4 Digital Signaling 159 s(
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Sec. 3-4 Digital Signaling 161 1.5
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Sec. 3-4 Digital Signaling 163 Bina
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Sec. 3-5 Line Codes and Spectra 165
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Sec. 3-6 Intersymbol Interference 1
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Sec. 3-7 Differential Pulse Code Mo
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DPCM transmitter Analog input signa
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Sec. 3-8 Delta Modulation 199 DM tr
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Sec. 3-8 Delta Modulation 201 Granu
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Sec. 3-8 Delta Modulation 203 This
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Analog input signal Low-pass filter
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Analog input signals Channel 1 (fro
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Low-level distorted TDM input Ampli
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Sec. 3-9 Time-Division Multiplexing
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1 1 1 1 1 30 digital inputs, 64 kb/
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Sec. 3-10 Packet Transmission Syste
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Sec. 3-11 Pulse Time Modulation: Pu
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Sec. 3-11 Pulse Time Modulation: Pu
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Sec. 3-13 Study-Aid Examples 225 (a
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Sec. 3-13 Study-Aid Examples 227 (d
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Problems 229 ★ 3-7 Assume that an
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Problems 231 How does the PSD for t
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Problems 233 (a) Using a PC, calcul
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Problems 235 and w 3 (t) = -(t - 1)
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C h a p t e r BANDPASS SIGNALING PR
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Sec. 4-1 Complex Envelope Represent
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Sec. 4-3 Spectrum of Bandpass Signa
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AM A c |1+m(t2| e 0, m (t) 7-1 L c
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Sec. 4-4 Evaluation of Power 245 Re
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Sec. 4-4 Evaluation of Power 247 wh
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Sec. 4-5 Bandpass Filtering and Lin
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Sec. 4-5 Bandpass Filtering and Lin
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Sec. 4-6 Bandpass Sampling Theorem
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Sec. 4-8 Classification of Filters
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Sec. 4-8 Classification of Filters
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Sec. 4-9 Nonlinear Distortion 259 T
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Sec. 4-9 Nonlinear Distortion 261 t
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Sec. 4-9 Nonlinear Distortion 263 w
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Sec. 4-10 Limiters 265 v out Ideal
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Sec. 4-11 Mixers, Up Converters, an
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Sec. 4-12 Frequency Multipliers 273
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Sec. 4-13 Detector Circuits 275 the
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Sec. 4-13 Detector Circuits 277 Det
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Sec. 4-13 Detector Circuits 279 Fre
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Sec. 4-13 Detector Circuits 281 Thi
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Sec. 4-14 Phase-Locked Loops and Fr
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Sec. 4-16 Transmitters and Receiver
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Sec. 4-17 Software Radios 297 Zero-
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Sec. 4-19 Study-Aid Examples 299 4-
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Sec. 4-19 Study-Aid Examples 301 No
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Sec. 4-19 Study-Aid Examples 303 Th
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PROBLEMS Problems 305 4-1 Show that
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Problems 307 where m(t) is the modu
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Problems 309 Assume that the input
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Problems 311 4-39 Rework Prob. 4-38
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C h a p t e r AM, FM, AND DIGITAL M
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Sec. 5-1 Amplitude Modulation 315 m
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Sec. 5-1 Amplitude Modulation 317 v
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Sec. 5-2 AM Broadcast Technical Sta
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Sec. 5-3 Double-Sideband Suppressed
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374 AM, FM, and Digital Modulated S
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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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452 will be WSS if and only if and
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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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( 610 Wire and Wireless Communicati
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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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