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B. P. Lathi, Zhi Ding - Modern Digital and Analog Communication Systems-Oxford University Press (2009)

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CONTENTS

5.3

5.4

5.5

5.6

5.7

5.8

GENERATING FM WAVES 222

DEMODULATION OF FM SIGNALS 231

EFFECTS OF NONLINEAR DISTORTION AND

INTERFERENCE 234

SUPERHETERODYNE ANALOG AM/FM RECEIVERS

FM BROADCASTING SYSTEM 241

MATLAB EXERCISES 242

239

6

SAMPLING AND ANALOG-TO-DIGITAL

CONVERSION 251

6.1 SAMPLING THEOREM 251

6.1 .1 Signal Reconstruction from Uniform Samples 253

6.1 .2 Practical Issues in Signal Sampling and

Reconstruction 258

6.1 .3 Maximum Information Rate: Two Pieces of

Information per Second per Hertz 262

6.1 .4 Nonideal Practical Sampling Analysis 263

6. 1.5 Some Applications of the Sampling Theorem 267

6.2 PULSE CODE MODULATION (PCM) 268

6.2.1 Advantages of Digital Communication 270

6.2.2 Quantizing 271

6.2.3 Principle of Progressive Taxation: Nonuniform

Quantization 27 4

6.2.4 Transmission Bandwidth and the Output SNR 278

6.3 DIGITAL TELEPHONY: PCM IN Tl CARRIER SYSTEMS 281

6.4 DIGITAL MULTIPLEXING 285

6.4.1

6.4.2

Signal Format 285

Asynchronous Channels and Bit Stuffing 287

6.4.3 Plesiochronous (almost Synchronous) Digital

Hierarchy 288

6.5 DIFFERENTIAL PULSE CODE MODULATION (DPCM) 290

6.6 ADAPTIVE DIFFERENTIAL PCM (ADPCM) 294

6.7 DELTA MODULATION 295

6.8 VOCODER$ AND VIDEO COMPRESSION 300

6.8.1 Linear Prediction Coding Vocoders 301

6.9 MATLAB EXERCISES 31 0

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