通信与信息工程专业英语教程PDF电子书下载

0.1　科技英语中的几个关键问题（Some Key Problems in Scientific and Technical English） 1

0.1.1　词汇（Vocabularies or Words） 1

Lesson 0　科技英语的基础知识（The Basic Knowledge of Scientific and Technical English） 1

0.1.2　虚义词（Form Words） 4

0.1.3　长句（Long Sentences） 6

0.2　翻译的准则（Criteria of Translation） 8

0.3　翻译中的变换（Changes in Translation） 9

0.3.1　词类的变换（Changes Between Word Classes） 9

0.3.2　词序的变换（Changes in Word Order） 10

0.3.3　省略（Ellipsis） 11

0.3.4　补充（Supplements） 11

0.3.5　引申（Extensions） 12

0.4　关于数量（Numbers and Quantities） 12

0.4.1　数制（Number Systems） 12

0.4.2　量词的缩写（Abbreviations about Numbers） 13

0.5　数学符号与数学式（Mathematic Symbols and Expressions） 14

0.5.1　常用数学符号（Mathematic Symbols） 14

0.4.3　关于数量的增减（About Increase and Decrease） 14

0.5.2　常用希腊字母（Grecian Letters） 15

0.5.3　常用数学式（Mathematic Expressions） 15

0.6　论文标题与摘要的写作（How to Write a Thesis） 15

0.6.1　论文标题（How to Write the Title） 15

0.6.2　论文摘要（How to Write the Abstract） 16

0.6.3　论文摘要的常用句型（Some Useful Patterns Used in the Abstract） 16

0.6.4　例子（Examples） 17

1.1　Historical Perspective 18

Lesson 1　Introduction to Electronic Communications 18

1.2　Electronic Communications Systems 20

1.3　The Electromagnetic Spectrum 22

1.4　Bandwidth and Information Capacity 23

Reading Material 29

Lesson 2　Information Sources 31

2.1　Speech and Music 31

2.2　Pictures 32

2.3　Computer Data 35

2.4　JPEG and MPEG 37

Reading Material 43

Lesson 3　Signals and Noise 45

3.1　Physically Realizable Waveforms 45

3.2　Signal Power 47

3.3　Noise 49

Reading Material 55

Lesson 4　Signal Generation 57

4.1　LC Circuits 57

4.2　Oscillators 59

4.3　Integrated-Circuit Waveform Generation 64

Reading Material 68

Lesson 5　Random Processes 70

5.1　Introduction 70

5.2　Mathematical Definition of a Random Process 70

5.3　Stationary Process 71

5.4　Mean,Correlation,and Covariance Functions 73

5.5　Ergodic Processes 74

5.6　Gaussian Process 75

Reading Material 80

Lesson 6　Amplitude Modulation Transmission 82

6.1　Principles of Amplitude Modulation 82

6.2　AM Modulator Circuits 87

Reading Material 95

Lesson 7　Single-side Band Modulation 97

7.1　Introduction 97

7.2　Generation of SSB Waves 101

7.3　Demodulation of SSB Waves 104

Reading Material 110

Lesson 8　Angle Modulation 112

8.1 Representation of PM and FM Signals 112

8.2　Spectra of Angle-Modulated Signals 115

8.3 Narrowband Angle Modulation 116

8.4　Wideband Frequency Modulation 117

8.5　Preemphasis and Deemphasis in Angle-Modulated Systems 118

Reading Material 123

9.1　Types of Transmission Lines 124

Lesson 9　Transmission Lines 124

9.2　Transmission-line Wave Propagation 127

9.3　Time-domain Reflectometry 128

Reading Material 134

Lesson 10　Electromagnetic Wave Propagation 137

10.1　Introduction 137

10.2　Optical Properties of Radio Waves 138

10.3　Terrestrial Propagation of Electromagnetic Waves 141

Reading Material 146

Lesson 11　Antennas and Waveguides 148

11.1　Introduction 148

11.2　Antenna Terminology and Definitions 149

11.3　Antenna Arrays and Array Antenna[14] 152

11.4　Waveguides 154

Reading Material 159

Lesson 12　Optical fiber communications 161

12.1　Fibers in communications 161

12.2　Fiber-Optic Communication Equipment 162

12.3　Transmitter's Operational Considerations 164

12.4　WDM Systems 167

Reading Material 172

Lesson 13　Digital Modulation 174

13.1　Introduction 174

13.2　Factors That Influence the Choice of Digital Modulation 174

13.3　Binary Modulated Bandpass Signaling 176

13.4　Multilevel Modulated Bandpass Signaling 180

Reading Material 187

Lesson 14　Data Communications,Codes Error Control 189

14.1　Introduction 189

14.2　Data Communications Circuits 189

14.3　Data Communications Codes 192

14.4 Error Control 193

Reading Material 201

Lesson 15　Communication Networks 203

15.1　Telephone Networks 203

15.2　Computer Networks 205

15.3　Cable Television Networks 208

15.4　Wireless Networks 209

Reading Material 216

Lesson 16　Speech Coding 219

16.1　Introduction 219

16.2　Characteristics of Speech Signals 221

16.3　Adaptive Differential Pulse Code Modulation(ADPCM) 223

16.4　Frequency Domain Coding of Speech 223

16.5　Performance Evaluation of Speech Coders 225

Reading Material 233

Lesson 17　Microwave Radio Communications 235

17.1　Introduction 235

17.2　Frequency-Modulated Microwave Radio System 236

17.3　Digital Radio Systems 238

Reading Material 243

Lesson 18　Satellite Communication Systems 245

18.1　Introduction 245

18.2　Design of the Satellite Link 246

18.3　Network Architecture 248

18.4　Geostationary Satellite Systems 250

Reading Material 256

Lesson 19　Multiple Accessing 259

19.1　Introduction 259

19.2　Frequency Division Multiple Access 260

19.3　Time Division Multiple Access and ALOHA 261

19.4　Code Division Multiple Access 264

Reading Material 270

Lesson 20　Mobile Telephone Service 272

20.1 Introduction 272

20.2　Basic Cellular Telephone Concepts 273

20.3　Digital Cellular Telephone 274

20.4　Code-division Multiple Accessing 276

Reading Material 281

参考译文 283

参考文献 345