Multi-carrier Techniques For Broadband Wireless Communications: A Signal Processing Perspective

by C-c Jay Kuo, Michele Morelli, Man-on Pun

Overview

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.

Product Details

ISBN-13:	9781860949463
Publisher:	Imperial College Press
Publication date:	12/13/2007
Series:	Communications And Signal Processing , #3
Pages:	272
Product dimensions:	5.90(w) x 9.10(h) x 0.70(d)

Table of Contents

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