Multi-Carrier Techniques For Broadband Wireless Communications: A Signal Processing Perspectives

by Pun, Man-on; Morelli, Michele; Kuo, C. C. Jay

• ISBN13: 9781860949463
• ISBN10: 1860949460
• Format: Hardcover
• Copyright: 2008-03-30
• Publisher: World Scientific Pub Co Inc

Summary

"Multi-Carrier Techniques for Broadband Wireless Communications provides an accessible introduction to OFDM-based systems from a signal processing perspective. The first part presents a concise treatment of some fundamental concepts related to wireless communications and multicarrier systems, while the second offers a comprehensive survey of recent developments on a variety of critical design issues. These include synchronization techniques, channel estimation methods, adaptive resource allocation and practical schemes for reducing the peak-to-average power ratio of the transmitted waveform."--BOOK JACKET.

Table of Contents

Preface	p. vii
Introduction	p. 1
Aim of this book	p. 1
Evolution of wireless communications	p. 3
Pioneering era of wireless communications	p. 4
First generation (1G) cellular systems	p. 5
Second generation (2G) cellular systems	p. 6
Third generation (3G) cellular systems	p. 7
Wireless local and personal area networks	p. 8
Wireless metropolitan area networks	p. 11
Next generation wireless broadband systems	p. 13
Historical notes on multicarrier transmissions	p. 14
Outline of this book	p. 15
Fundamentals of OFDM/OFDMA Systems	p. 17
Mobile channel modeling	p. 17
Parameters of wireless channels	p. 18
Categorization of fading channels	p. 27
Conventional methods for channel fading mitigation	p. 33
Time-selective fading	p. 34
Frequency-selective fading	p. 34
OFDM systems	p. 37
System architecture	p. 37
Discrete-time model of an OFDM system	p. 40
Spectral efficiency	p. 44
Strengths and drawbacks of OFDM	p. 45
OFDM-based multiple-access schemes	p. 46
Channel coding and interleaving	p. 48
Time and Frequency Synchronization	p. 51
Sensitivity to timing and frequency errors	p. 52
Effect of timing offset	p. 54
Effect of frequency offset	p. 58
Synchronization for downlink transmissions	p. 61
Timing acquisition	p. 62
Fine timing tracking	p. 67
Frequency acquisition	p. 69
Frequency tracking	p. 72
Synchronization for uplink transmissions	p. 76
Uplink signal model with synchronization errors	p. 78
Timing and frequency estimation for systems with subband CAS	p. 81
Timing and frequency estimation for systems with interleaved CAS	p. 84
Frequency estimation for systems with generalized CAS	p. 88
Timing and frequency offset compensation in uplink transmissions	p. 95
Timing and frequency compensation with subband CAS	p. 96
Frequency compensation through interference cancellation	p. 100
Frequency compensation through linear multiuser detection	p. 101
Performance of frequency correction schemes	p. 104
Channel Estimation and Equalization	p. 107
Channel equalization	p. 108
Pilot-aided channel estimation	p. 111
Scattered pilot patterns	p. 112
Pilot distances in time and frequency directions	p. 113
Pilot-aided channel estimation	p. 114
2D Wiener interpolation	p. 115
Cascaded 1D interpolation filters	p. 117
Advanced techniques for blind and semi-blind channel estimation	p. 125
Subspace-based methods	p. 126
EM-based channel estimation	p. 129
Performance comparison	p. 133
Joint Synchronization, Channel Estimation and Data Symbol Detection in OFDMA Uplink	p. 135
Uncoded OFDMA uplink	p. 136
Signal model	p. 136
Iterative detection and frequency synchronization	p. 137
Practical adjustments	p. 144
Performance assessment	p. 146
Trellis-coded OFDMA uplink	p. 150
Signal model for coded transmissions	p. 150
Iterative detection and frequency synchronization with coded transmissions	p. 152
Performance assessment	p. 157
Dynamic Resource Allocation	p. 159
Resource allocation in single-user OFDM systems	p. 160
Classic water-filling principle	p. 161
Rate maximization and margin maximization	p. 166
Rate-power function	p. 167
Optimal power allocation and bit loading under BER constraint	p. 168
Greedy algorithm for power allocation and bit loading	p. 171
Bit loading with uniform power allocation	p. 173
Performance comparison	p. 176
Subband adaptation	p. 178
Open-loop and closed-loop adaptation	p. 179
Signaling for modulation parameters	p. 180
Resource allocation in multiuser OFDM systems	p. 182
Multiaccess water-filling principle	p. 184
Multiuser rate maximization	p. 188
Max-min multiuser rate maximization	p. 190
Multiuser margin maximization	p. 192
Subcarrier assignment through average channel signal-to-noise ratio	p. 194
Dynamic resource allocation for MIMO-OFDMA	p. 197
Cross-layer design	p. 199
Peak-to-Average Power Ratio (PAPR) Reduction	p. 201
PAPR definitions	p. 202
Continuous-time and discrete-time PAPR	p. 203
Statistical properties of PAPR	p. 206
Amplitude clipping	p. 208
Clipping and filtering of oversampled signals	p. 209
Signal-to-clipping noise ratio	p. 214
Clipping noise mitigation	p. 217
Selected mapping (SLM) technique	p. 219
Partial transmit sequence (PTS) technique	p. 223
Coding	p. 228
Tone reservation and injection techniques	p. 232
Tone reservation (TR)	p. 232
Tone injection (TI)	p. 234
PAPR reduction for OFDMA	p. 237
SLM for OFDMA	p. 238
PTS for OFDMA	p. 238
TR for OFDMA	p. 238
Design of AGC unit	p. 239
Bibliography	p. 243
Index	p. 255
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