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数字与模拟通信系统 英文pdf电子书版本下载
- (美)Leon W.Couch Ⅱ著 著
- 出版社: 北京:科学出版社
- ISBN:7030111451
- 出版时间:2003
- 标注页数:762页
- 文件大小:27MB
- 文件页数:789页
- 主题词:数字通信系统-高等学校-教材-英文;模拟通信-通信系统-高等学校-教材-英文
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图书目录
1 INTRODUCTION 1
1-1 Historical Perspective 2
1-2 Digital and Analog Sources and Systems 5
1-3 Deterministic and Random Waveforms 6
1-4 Organization of the Book 6
1-5 Use of a Personal Computer and MATLAB 7
1-6 Block Diagram of a Communication System 8
1-7 Frequency Allocations 10
1-8 Propagation of Electromagnetic Waves 12
1-9 Information Measure 16
1-10 Channel Capacity and Ideal Communication Systems 18
1-11 Coding 19
Block Codes, 20
Convolutional Codes, 22
Code Interleaving, 25
Code Performance, 25
Trellis-Coded Modulation, 28
1-12 Preview 29
1-13 Study-Aid Examples 29
Problems 30
2-1 Properties of Signals and Noise 33
2 SIGNALS AND SPECTRA 33
Physically Realizable Waveforms, 34
Time Average Operator, 35
Dc Value, 36
Power, 37
Rms Value and Normalized Power, 39
Energy and Power Waveforms, 40
Decibel, 40
Phasors, 42
Definition, 43
2-2 Fourier Transform and Spectra 43
Properties of Fourier Transforms, 46
Parseval's Theorem and Energy Spectral Density, 48
Dirac Delta Function and Unit Step Function, 51
Rectangular and Triangular-Pulses, 54
Convolution, 58
2-3 Power Spectral Density and Autocorrelation Function 61
Power Spectral Density, 61
Autocorrelation Function, 63
2-4 Orthogonal Series Representation of Signals and Noise 65
Orthogonal Functions, 65
Orthogonal Series, 67
Complex Fourier Series, 68
2-5 Fourier Series 68
Quadrature Fourier Series, 70
Polar Fourier Series, 71
Line SpectraforPeriodic Waveforms, 73
Power Spectral Density for Periodic Waveforms, 77
2-6 Review of Linear Systems 79
Linear Time-Invariant Systems, 79
Impulse Response, 79
Transfer Function, 80
Distortionless Transmission, 83
Distortion ofAudio,Video,and Data Signals, 84
2-7 Bandlimited Signals and Noise 86
Bandlimited Waveforms, 86
Sampling Theorem, 87
Impulse Sampling and Digital Signal Processing(DSP), 90
Dimensionality Theorem, 93
2-8 Discrete Fourier Transform 94
Using the DFT to Compute the Continuous Fourier Transform, 95
Using the DFT to Compute the FourierSeries, 100
2-9 Bandwidth of Signals 101
2-10 Summary 110
2-11 Study-Aid Examples 110
Problems 115
3 BASEBAND PULSE AND DIGITAL SIGNALING 128
3-1 Introduction 128
3-2 Pulse Amplitude Modulation 129
Natural Sampling(Gating), 129
Instantaneous Sampling(Flat-Top PAM), 133
3-3 Pulse Code Modulation 137
Sampling,Quantizing,and Encoding, 138
Practical PCM Circuits, 138
Bandwidth ofPCMSignals, 142
Effects of Noise, 143
Nonuniform Quantizing:μ-Law and A-Law Companding, 147
V.9056-kb/sPCMComputerModem, 151
3-4 Digital Signaling 152
Vector Representation, 153
Bandwidth Estimation, 155
Binary Signaling, 156
Multilevel Signaling, 158
3-5 Line Codes and Spectra 160
Binary Line Coding, 160
Power Spectra for Binary Line Codes, 163
Differential Coding, 169
Eye Patterns, 170
Regenerative Repeaters, 171
Bit Synchronization, 173
Power Spectra for Multilevel Polar NRZ Signals, 176
Spectral Efficiency, 179
3-6 Intersymbol Interference 180
Nyquist's First Method(Zero ISI), 182
Raised Cosine-Rolloff Nyquist Filtering, 183
Nyquist's Second and Third Methods for Control of ISI, 188
3-7 Differential Pulse Code Modulation 188
3-8 Delta Modulation 192
Granular Noise and Slope Overload Noise, 194
Adaptive Delta Modulation and Continuously Variable Slope Delta Modulation, 197
3-9 Time-Division Multiplexing 199
Speech Coding, 199
Frame Synchronization, 200
Synchronous and Asynchronous Lines, 202
TDM Hierarchy, 206
The T1 PCM System, 211
3-10 Packet Transmission System 213
3-11 Pulse Time Modulation:Pulse Width Modulation and Pulse Position Modulation 213
3-12 Summary 215
3-13 Study-Aid Examples 218
Problems 221
4-1 Complex Envelope Representation of Bandpass Waveforms 230
4 BANDPASS SIGNALING PRINCIPLES AND CIRCUITS 230
Definitions:Baseband,Bandpass,and Modulation, 231
Complex Envelope Representation, 231
4-2 Representation of Modulated Signals 233
4-3 Spectrum of Bandpass Signals 234
4-4 Evaluation ot Power 237
4-5 Bandpass Filtering and Linear Distortion 240
Equivalent Low-Pass Filter, 240
Linear Distortion, 242
4-6 Bandpass Sampling Theorem 244
4-7 Received Signal Plus Noise 245
Filters, 246
4-8 Classification of Filters and Amplifiers 246
Amplifiers, 250
4-9 Nonlinear Distortion 251
4-10 Limiters 256
4-11 Mixers,Up Converters,and Down Converters 257
4-12 Frequency Multipliers 263
4-13 Detector Circuits 265
Envelope Detector, 265
Product Detector, 266
Frequency Modulation Detector, 268
4-14 Phase-Locked Loops and Frequency Synthesizers 273
Generalized Transmitters, 281
4-15 Direct Digital Synthesis 281
4-16 Transmitters and Receivers 281
Generalized Receiver:The Superheterodyne Receiver, 283
Zero-IF Receivers, 287
Interference, 288
4-17 Software Radios 288
4-18 Summary 289
4-19 Study-Aid Examples 289
Problems 295
5 AM,FM,AND DIGITAL MODULATED SYSTEMS 302
5-1 Amplitude Modulation 303
5-2 AM Broadcast Technical Standards 308
5-3 Double-Sideband Suppressed Carrier 309
5-4 Costas Loop and Squaring Loop 310
5-5 Asymmetric Sideband Signals 312
Single Sideband, 312
Vestigial Sideband, 316
5-6 Phase Modulation and Frequency Modulation 318
Representation of PM and FM signals, 318
Spectra of Angle-Modulated Signals, 323
Narrowband Angle Modulation, 328
Wideband Frequency Modulation, 329
5-7 Frequency-Division Multiplexing and FM Stereo 333
Preemphasis and Deemphasis in Angle-Modulated Systems, 333
5-8 FM Broadcast Technical Standards 337
5-9 Binary Modulated Bandpass Signaling 337
On-OffKeying(OOK), 340
Binary-Phase-Shift Keying(BPSK), 343
DifferentialPhase-Shift Keying(DPSK), 344
Frequency-Shift Keying(FSK), 345
5-10 Multilevel Modulated Bandpass Signaling 352
Quadrature Phase-Shift Keying(QPSK)and M-ary Phase-Shift Keying(MPSK), 352
Quadrature Amplitude Modulation(QAM), 355
OQPSK and π/4 QPSK, 356
PSDforMPSK,QAM,QPSK,OQPSK and π/4 QPSK 357
Spectral Efficiencyfor MPSK,QAM,QPSK,OQPSK,andπ/4 QPSK with Raised Cosine Filtering 359
5-11 Minimum-Shift Keying(MSK)and GMSK 360
5-12 Orthogonal Frequency Division Multiplexing(OFDM) 365
5-13 Spread Spectrum Systems 370
Direct Sequence, 371
Frequency Hopping, 377
5-14 Summary 377
5-15 Study-Aid Examples 379
Problems 382
6 RANDOM PROCESSES AND SPECTRAL ANALYSIS 395
Random Processes, 396
6-1 Some Basic Deftnitions 396
Stationarity and Ergodicity, 397
Correlation Functions and Wide-Sense Stationarity, 401
Complex Random Processes, 403
6-2 Power Spectral Density 405
Definition, 405
Wiener-Khintchine Theorem, 406
Properties of the PSD, 409
General Formulaforthe PSD of Digital Signals, 413
White Noise Processes, 416
Measurement of PSD, 417
6-3 Dc and Rms Values for Ergodic Random Processes 418
6-4 Linear Systems 420
Input-Output Relationships, 420
6-5 Bandwidth Measures 425
Equivalent Bandwidth, 425
Rms Bandwidth, 425
6-6 The Gaussian Random Process 427
Properties of Gaussian Processes, 428
6-7 Bandpass Processes 431
Bandpass Representations, 431
Properties of WSS Bandpass Processes, 435
Proofs of Some Properties, 439
General Results, 445
6-8 Matched Filters 445
Results for White Noise, 447
Correlation Processing, 450
Transversal Matched Filter, 452
6-9 Summary 455
6-10 Appendix:Proof of Schwarz's Inequality 457
6-11 Study-Aid Examples 459
Problems 462
7 PERFORMANCE OF COMMUNICATION SYSTEMS CORRUPTED BY NOISE 472
General Results, 473
7-1 Error Probabilities for Binary Signaling 473
Results for Gaussian Noise, 475
Results for White Gaussian Noise and Matched-Filter Reception, 477
Results for Colored Gaussian Noise and Matched-Filter Reception, 478
7-2 Performance of Baseband Binary Systems 479
Unipolar Signaling, 479
Polar Signaling, 482
Bipolar Signaling, 482
7-3 Coherent Detection of Bandpass Binary Signals 484
On-Off Keying, 484
Binary-Phase-Shift Keying, 486
Frequency-Shift Keying, 487
7-4 Noncoherent Detection of Bandpass Binary Signals 490
On-Off Keying, 490
Frequency-Shift Keying, 494
Differential Phase-Shift Keying, 496
7-5 Quadrature Phase-Shift Keying and Minimum-Shift Keying 498
7-6 Comparison of Digital Signaling Systems 500
Bit Error Rate and Bandwidth, 500
Symbol Error and Bit Errorfor Multilevel Signaling, 502
Synchronization, 503
7-7 Output Signal-to-Noise Ratio for PCM Systems 504
Comparison with Baseband Systems, 510
7-8 Output Signal-to-Noise Ratios for Analog Systems 510
AM Systems with Product Detection, 511
AM Systems with Envelope Detection, 513
DSB-SC Systems, 514
SSB Systems, 515
PM Systems, 515
FM Systems, 519
FM Systems with Threshold Extension, 522
FM Systems with Deemphasis, 524
7-9 Comparison of Analog Signaling Systems 527
Ideal System Performance, 527
7-11 Study-Aid Examples 530
7-10 Summary 530
Problems 539
8 WIRE AND WIRELESS COMMUNICATION SYSTEMS 547
8-1 The Explosive Growth of Telecommunications 547
8-2 Telephone Systems 548
Historical Basis, 548
Modem Telephone Systems and Remote Terminals, 549
8-3 Digital Subscriber Lines(DSL) 555
G.DMT and G.Lite Digital Subscriber Lines, 556
Video On Demand(VOD), 558
Integrated Service Digital Network(ISDN), 558
8-5 Satellite Communication Systems 561
8-4 Capacities of Public Switched Telephone Networks 561
Digital and Analog Television Transmission, 565
Data and Telephone Signal Multiple Access, 567
Personal Communications via Satellite, 573
8-6 Link Budget Analysis 575
Signal Power Received, 575
Thermal Noise Sources, 577
Characterization of Noise Sources, 578
Noise Characterization of Linear Devices, 579
Noise Characterization of Cascaded Linear Devices, 585
Link Budget Evaluation, 587
Eb/No Link Budget for Digital Systems, 589
Path Loss for Urban Wireless Environments, 590
8-7 Fiber Optic Systems 594
8-8 Cellular Telephone Systems 598
First Generation(1G)-The AMPS Analog System, 599
Second Generation(2G)-The Digital Systems, 602
The 1,900-MHzBand PCS Systems, 605
Third Generation(3G)Systems, 605
8-9 Television 606
Black-and-White Television, 606
Color Television, 613
MTS Stereo Sound, 613
Standards for TVand CATV Systems, 618
Digital TV(DTV), 622
8-10 Summary 627
8-11 Study-Aid Examples 628
Problems 632
APPENDIX A MATHEMATICAL TECHNIQUES,IDENTITIES,AND TABLES 639
A-1 Trigonometry and Complex Numbers 639
Definitions, 639
Trigonometric Identities, 639
Derivative Table, 640
Differentiation Rules, 640
Definition, 640
A-2 Difierential Calculus 640
A-3 Indeterminate Forms 641
A-4 Integral Calculus 641
Definition, 641
Integration Techniques, 642
A-5 Integral Tables 642
Indefinite Integrals, 642
Definite Integrals, 643
Finite Series, 644
Infinite Series, 644
A-6 Series Expansions 644
A-7 Hilbert Transform Pairs 645
A-8 The Dirac Delta Function 645
Properties of Dirac Delta Function, 646
A-9 Tabulation of Sa(x)=(sin x)/x 647
A-10 Tabulation of Q(z) 648
APPENDIX B PROBABILITY AND RANDOM VARIABLES 650
B-1 Introduction 650
B-2 Sets 651
B-3 Probability and Relative Frequency 652
SimpleProbability, 652
Joint Probability, 653
Conditional Probabilities, 654
B-4 Random Variables 655
B-5 Cumulative Distribution Functions and Probability Density Functions 655
Properties of CDFs and PDFs, 658
Discrete and Continuous Distributions, 658
B-6 Ensemble Average and Moments 662
Ensemble Average, 662
Moments, 663
B-7 Examples of Important Distributions 665
Binomial Distribution, 665
Gaussian Distribution, 668
Uniform Distribution, 668
Poisson Distribution, 668
Sinusoidal Distribution, 673
B-8 Functional Transformations of Random Variables 673
B-9 Multivariate Statistics 678
Multivariate CDFs and PDFs, 678
Bivariate Statistics, 680
Gaussian Bivariate Distribution, 681
Multivariate Functional Transformation, 682
Central LimitTheorem, 684
Problems 686
ASCII, 692
Baudot, 692
APPENDIX C STANDARDS AND TERMINOLOGY FOR COMPUTER COMMUNICATIONS 692
C-1 Codes 692
C-2 DTE/DCE and Ethernet Interface Standards 693
Universal Seriai Bus(USB), 695
RS-232D,RS-422A,RS-449,and RS-530 Interfaces, 695
Centronics Parallel Interface, 696
IEEE-488 Parallel Interface, 697
Ethernet(IEEE 802.3)Interface, 698
C-3 The ISO OSI Network Model 700
TCP/IP, 703
SDLC, 703
C-4 Data Link Control Protocols 703
HDLC, 704
CCITT X.25 Protocol, 704
Asynchronous TransferMode(ATM), 705
C-5 Modem Standards 706
APPENDIX D USING MATLAB 712
D-1 Quick Start for Running M-Files 713
D-2 Programming in MATLAB 714
REFERENCES 716
ANSWERS TO SELECTED PROBLEMS 729
INDEX 735