## Communication SystemsCommunication Systems is as an introductory textbook, presenting Fourier transform, convolution, and definitions of autocorrelation and power spectral density. It also introduces concepts of probability, random variables, and stochastic processes and their applications to the analysis of linear systems. Innovatively, the text treats the modulation process using stochastic processes as well as covers amplitude modulation, quadrature modulation, angle modulation, mobile cellular systems, propagation channels and more. Quantization and coding of analog signals is also treated, as well as speech coding. Channel modeling, including channel characteristics and propagation, is covered with an emphasis on simple models. Transmission and reception of modulated carriers is included as well as the required transmitting and receiving equipment. Mobile communication is also covered and considers both analog and digital systems. The authors provide five appendices which cover topics such as Fourier series and transforms, Hilbert transform, important formulae, and cellular systems including CDMA and GSM standards. Many examples are provided as well as problems at the end of each chapter to allow the reader to practice his acquired knowledge. |

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### Contents

SIGNAL ANALYSIS | 1 |

13 Fourier Transform | 9 |

Linearity | 17 |

15 The Sampling Theorem | 23 |

16 Parsevals Theorem | 26 |

17 Average Power and Autocorrelation | 27 |

18 Problems | 31 |

PROBABILITY THEORY AND RANDOM PROCESSES | 41 |

66 Problems | 217 |

PROPAGATION CHANNELS | 225 |

72 Nonguided Channels | 226 |

73 Effects on the Transmitted Signal | 233 |

74 The Mobile Communication Channel | 235 |

76 Problems | 254 |

CARRIER TRANSMISSION | 257 |

82 Features of the Cavity and Solid State Amplifiers | 260 |

22 Probability Theory | 49 |

23 Random Variables | 53 |

24 Stochastic Processes | 59 |

25 Linear Systems | 73 |

26 Mathematical Formulation for the Digital Signal | 81 |

27 Problems | 86 |

SPEECH CODING | 99 |

32 Signal Coding Preliminaries | 100 |

33 The Performance of a Signal Compression System | 101 |

34 Features of Speech Signals | 105 |

35 Pulse Code Modulation | 108 |

36 Noise Spectrum for the Uniform Quantizer | 115 |

37 Vector Quantization | 123 |

38 LPC Parameters | 126 |

39 Overview of Speech Coding | 130 |

310 Waveform Coding | 131 |

311 Parametric and Hybrid Coding | 133 |

312 Speech Coder Attributes | 138 |

313 Problems | 139 |

AMPLITUDE MODULATION | 141 |

42 Amplitude Modulation | 142 |

43 Amplitude Modulation by Random Signals | 146 |

44 Amplitude Modulators | 149 |

45 Suppressed Carrier Amplitude Modulation | 154 |

47 AMVSB Modulation | 156 |

48 Amplitude Demodulation | 158 |

49 Performance of Amplitude Modulation | 159 |

410 Problems | 161 |

QUADRATURE AMPLITUDE MODULATION | 171 |

52 Single Sideband Amplitude Modulation | 173 |

53 ISB Modulation | 179 |

54 AMStereo | 181 |

55 Quadrature Amplitude Demodulation | 182 |

56 Performance Evaluation of SSB | 183 |

58 Problems | 188 |

ANGLE MODULATION | 197 |

62 Angle Modulation Using Random Signals | 198 |

63 Frequency and Phase Demodulation | 210 |

64 Performance Evaluation of Angle Modulation | 214 |

65 Angle Modulation with Digital Signal | 216 |

83 Communication Channels | 261 |

84 Microwave Systems | 266 |

85 Antennas | 268 |

86 Link Budget | 271 |

87 Problems | 275 |

MOBILE CELLULAR TELEPHONY | 279 |

92 Systems in Commercial Operation | 280 |

93 Description of the Cellular System | 281 |

94 Frequency Reuse | 285 |

95 Management of Channel Utilization | 289 |

96 Constitution of the Cellular System | 291 |

97 Characteristic Functions of a Cellular Network | 296 |

98 Radio Channel Types | 300 |

99 Digital Systems | 303 |

910 Problems | 310 |

Fourier Series and Fourier Transform | 315 |

A1 Useful Fourier Transforms | 317 |

A2 Some Hilbert Transforms | 323 |

Formulas and Important Inequalities | 325 |

Use of the Radiofrequency Spectrum | 333 |

The CDMA Standard | 339 |

D2 Spread Spectrum | 340 |

D3 Convolutional Coding | 343 |

D4 CDMA and the IS95 Standard | 345 |

D5 CDMA 1x EVDO | 355 |

D6 Problems | 356 |

The GSM Standard | 359 |

E2 System Architecture | 360 |

E3 Procedure for Registering the Mobile Station | 364 |

E4 Establishing a Call | 365 |

E6 Security Parameters | 367 |

E8 Cryptography | 386 |

E10 Frequency Hopping | 387 |

E11 GSM Services | 389 |

E12 EDGE | 397 |

E13 Problems | 398 |

399 | |

About the Authors | 407 |

411 | |