OFDM-Based Broadband Wireless Networks Design

OFDM-based Broadband Wireless Networks covers the latest technological advances in digital broadcasting, wireless LAN, and mobile networks to achieve high spectral efficiency, and to meet peak requirements for multimedia traffic. The book emphasizes the OFDM modem, air-interface, medium access-control (MAC), radio link protocols, and radio network planning.An Instructor Support FTP site is available from the Wiley editorial department.

HUI LIU, PhD, is Associate Professor in the Electrical Engineering Department at the University of Washington. Dr. Liu has published more than forty journal articles and holds eighteen awarded or pending patents. He founded Broadstorm Inc. in 2000 and developed the world's first OFDMA-based mobile broadband system. He is the author of Signal Processing Applications in CDMA Communications and is the General Chairman for the 2005 Asilomar Conference on Signals, Systems, and Computers.

GUOQING LI, PhD, is a Research Scientist in the Communication Technology Lab of Intel, where she works on broadband wireless technologies. Previously, Dr. Li worked as a senior system engineer at UTStarcom, developing algorithms for physical, multiple access control, radio link control, and radio resource control layers for 3G-WCDMA and IS-95 networks. Dr. Li has published more than twenty journal articles and conference papers.

Preface

xi

Introduction

1

(12)

OFDM-based wireless network overview

1

(5)

Digital broadcasting and DVB-T

2

(1)

Wireless LAN and IEEE 802.11

3

(2)

WiMAX and IEEE 802.16

5

(1)

The need for ``cross-layer'' design

6

(3)

Organization of this text

9

(4)

Bibliography

11

(2)

OFDM Fundamentals

13

(18)

Broadband radio channel characteristics

13

(6)

Envelope fading

14

(1)

Time dispersive channel

15

(1)

Frequency dispersive channel

16

(1)

Statistical characteristics of broadband channels

17

(2)

Canonical form of broadband transmission

19

(5)

OFDM realization

24

(4)

Summary

28

(3)

Bibliography

29

(2)

PHY Layer Issues --- System Imperfections

31

(36)

Frequency synchronization

31

(7)

OFDM carrier offset data model

32

(1)

Pilot-based estimation

33

(1)

Non-pilot based estimation

34

(4)

Channel estimation

38

(8)

Pilots for 2D OFDM channel estimation

38

(2)

2D MMSE channel estimation

40

(2)

Reduced complexity channel estimation

42

(4)

I/Q imbalance compensation

46

(9)

I/Q imbalance model

47

(1)

Digital compensation receiver

48

(2)

Frequency offset estimation with I/Q imbalance

50

(5)

Phase noise compensation

55

(8)

Mathematical models for phase noise

57

(2)

CPE estimation with channel state information

59

(2)

Time domain channel estimation in the presence of CPE

61

(1)

CPE estimation without explicit CSI

61

(2)

Summary

63

(4)

Bibliography

63

(4)

PHY Layer Issues --- Spatial Processing

67

(33)

Antenna array fundamentals

67

(3)

Beamforming

70

(5)

Coherent combining

70

(1)

Zero-forcing

71

(1)

MMSE reception (optimum linear receiver)

71

(2)

SDMA

73

(1)

Broadband beamforming

74

(1)

MIMO channels and capacity

75

(5)

Space-time coding

80

(5)

Spatial multiplexing

80

(1)

Orthogonal space-time block coding

81

(1)

Concatenated ST transmitter

82

(1)

Beamforming with ST coding

83

(2)

ST beamforming in OFDM

85

(1)

Wide-area MIMO beamforming

85

(8)

Data model

85

(2)

Uncoded OFDM design criterion

87

(3)

Coded OFDM design criterion

90

(3)

Summary

93

(7)

Appendix I: derivation of P

97

(1)

Appendix II: proof of proposition 5

97

(1)

Appendix III: proof of proposition 6

97

(1)

Bibliography

97

(3)

Multiple Access Control Protocols

100

(38)

Introduction

100

(1)

Basic MAC protocols

100

(6)

Contention based protocols

100

(2)

Non-contention based MAC protocols

102

(4)

OFDMA advantages

106

(3)

Multiuser diversity

109

(7)

OFDMA optimality

116

(17)

Multiuser multicarrier SISO systems

117

(7)

Multiuser multicarrier MIMO systems

124

(9)

Summary

133

(5)

Appendix I:Cn(p) is a convex function

134

(1)

Appendix II: C(p) is a convex functiony

134

(1)

Bibliography

134

(4)

OFDMA Design Considerations

138

(28)

Cross-layer design introduction

138

(2)

Mobility-dependent traffic channels

140

(19)

OFDMA traffic channel

140

(1)

System model

141

(2)

Channel configuration for fixed applications

143

(11)

Channel configuration for mobile applications

154

(5)

IEEE 802.16e traffic channels

159

(4)

Summary

163

(3)

Bibliography

163

(3)

Multi-Cell Frequency Planning

166

(25)

Introduction

166

(4)

Fixed channel allocation

167

(2)

Dynamic channel allocation

169

(1)

OFDMA DCA

170

(10)

Protocol design

171

(3)

Problem formulation for the RNC

174

(2)

Problem formulation for the BSs

176

(1)

Fast algorithm for the RNC

177

(2)

Fast algorithm for BSs

179

(1)

Spectrum Efficiency

180

(6)

System configuration and signaling overhead

181

(3)

Channel loading gains

184

(2)

Summary

186

(5)

Bibliography

188

(3)

Appendix

191

(51)

IEEE 802.11 and WiFi

191

(21)

802.11 overview

191

(2)

802.11 network architecture

193

(3)

MAC layer technologies

196

(9)

Physical layer technologies

205

(7)

IEEE 802.16e and Mobile WiMAX

212

(21)

Overview

214

(1)

Physical layer technologies

214

(13)

MAC layer technologies

227

(6)

Performance analysis of WiMAX systems

233

(9)

WiMAX OFDMA-TDD

233

(1)

Comparison method

234

(5)

Bibliography

239

(3)

Notations, Acronyms and Commonly Used Symbols

242

(4)

About the Authors

246

(2)

Index

248

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OFDM-Based Broadband Wireless Networks Design and Optimization

Summary

Author Biography

Table of Contents

Supplemental Materials