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350 AM, FM, and Digital Modulated Systems Chap. 5 Left-channel audio m L (t) Right-channel audio m R (t) m L (t)+m R (t)=mono audio m L (t)-m R (t) DSB-SC subcarrier modulator f SC = 38 kHz + + + m b (t) Pilot tone FM transmitter f=f c Composite baseband signal s(t) Oscillator, f s f SC = 38 kHz Frequency divider, 2 (a) FM Stereo Transmitter |M b (f)| Spectrum of m L (t)+m R (t) Pilot tone Spectrum of DSB output 0 15 kHz 19 kHz 38 kHz f (b) Spectrum of Composite Baseband Signal Mono audio m b (t) 0 to 15 kHz Low-pass filter audio (amplifier) m L (t)+m R (t) 2 m L (t) Left audio s(t) FM receiver 23 to 53 kHz Bandpass filter f SC = 38 kHz 0 to 15 kHz Low-pass filter 2 m R (t) Right audio Product detector Low-pass filter Phase-locked loop 2 VCO (c) FM Stereo Receiver Figure 5–18 FM stereo system.
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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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Sec. 5-4 Costas Loop and Squaring L
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376 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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