Contents -- Preface -- 1. Introduction -- 1.1 Aim of this book -- 1.2 Evolution of wireless communications -- 1.2.1 Pioneering era of wireless communications -- 1.2.2 First generation (1G) cellular systems -- 1.2.3 Second generation (2G) cellular systems -- 1.2.4 Third generation (3G) cellular systems -- 1.2.5 Wireless local and personal area networks -- 1.2.6 Wireless metropolitan area networks -- 1.2.7 Next generation wireless broadband systems -- 1.3 Historical notes on multicarrier transmissions -- 1.4 Outline of this book -- 2. Fundamentals of OFDM/OFDMA Systems -- 2.1 Mobile channel modeling -- 2.1.1 Parameters of wireless channels -- 2.1.1.1 Path loss -- 2.1.1.2 Excess delay -- 2.1.1.3 Power delay profile -- 2.1.1.4 Root-mean-squared (RMS) delay spread -- 2.1.1.5 Coherence bandwidth -- 2.1.1.6 Doppler spread -- 2.1.1.7 Coherence time -- 2.1.2 Categorization of fading channels -- 2.1.2.1 Frequency-nonselective and slowly-fading channels -- 2.1.2.2 Frequency-selective fading channels -- 2.1.2.3 Time-selective fading channels -- 2.1.2.4 Frequency- and time-selective fading channels -- 2.2 Conventional methods for channel fading mitigation -- 2.2.1 Time-selective fading -- 2.2.2 Frequency-selective fading -- 2.3 OFDM systems -- 2.3.1 System architecture -- 2.3.2 Discrete-time model of an OFDM system -- 2.4 Spectral efficiency -- 2.5 Strengths and drawbacks of OFDM -- 2.6 OFDM-based multiple-access schemes -- 2.7 Channel coding and interleaving -- 3. Time and Frequency Synchronization -- 3.1 Sensitivity to timing and frequency errors -- 3.1.1 Effect of timing offset -- 3.1.2 Effect of frequency offset -- 3.2 Synchronization for downlink transmissions -- 3.2.1 Timing acquisition -- 3.2.2 Fine timing tracking -- 3.2.3 Frequency acquisition -- 3.2.4 Frequency tracking -- 3.3 Synchronization for uplink transmissions.

3.3.1 Uplink signal model with synchronization errors -- 3.3.2 Timing and frequency estimation for systems with subband CAS -- 3.3.3 Timing and frequency estimation for systems with interleaved CAS -- 3.3.4 Frequency estimation for systems with generalized CAS -- 3.4 Timing and frequency o®set compensation in uplink trans- missions -- 3.4.1 Timing and frequency compensation with subband CAS -- 3.4.2 Frequency compensation through interference cancellation -- 3.4.3 Frequency compensation through linear multiuser detection -- 3.4.4 Performance of frequency correction schemes -- 4. Channel Estimation and Equalization -- 4.1 Channel equalization -- 4.2 Pilot-aided channel estimation -- 4.2.1 Scattered pilot patterns -- 4.2.2 Pilot distances in time and frequency directions -- 4.2.3 Pilot-aided channel estimation -- 4.2.4 2D Wiener interpolation -- 4.2.5 Cascaded 1D interpolation lters -- 4.2.5.1 Cascaded 1D Wiener interpolators -- 4.2.5.2 Cascaded 1D polynomial-based interpolators -- 4.2.5.3 LS-based interpolation in frequency domain -- 4.3 Advanced techniques for blind and semi-blind channel estimation -- 4.3.1 Subspace-based methods -- 4.3.2 EM-based channel estimation -- 4.3.2.1 Likelihood function for joint data detection and channel estimation -- 4.3.2.2 Likelihood function maximization by EM algorithm -- 4.4 Performance comparison -- 5. Joint Synchronization, Channel Estimation and Data Symbol Detection in OFDMA Uplink -- 5.1 Uncoded OFDMA uplink -- 5.1.1 Signal model -- 5.1.2 Iterative detection and frequency synchronization -- 5.1.2.1 SAGE-based signal decomposition -- 5.1.2.2 ECM-based iterative estimator -- 5.1.3 Practical adjustments -- 5.1.4 Performance assessment -- 5.2 Trellis-coded OFDMA uplink -- 5.2.1 Signal model for coded transmissions -- 5.2.2 Iterative detection and frequency synchronization with coded transmissions.

5.2.3 Performance assessment -- 6. Dynamic Resource Allocation -- 6.1 Resource allocation in single-user OFDM systems -- 6.1.1 Classic water- lling principle -- 6.1.2 Rate maximization and margin maximization -- 6.1.3 Rate-power function -- 6.1.4 Optimal power allocation and bit loading under BER constraint -- 6.1.5 Greedy algorithm for power allocation and bit loading -- 6.1.6 Bit loading with uniform power allocation -- 6.1.7 Performance comparison -- 6.1.8 Subband adaptation -- 6.1.9 Open-loop and closed-loop adaptation -- 6.1.10 Signaling for modulation parameters -- 6.2 Resource allocation in multiuser OFDM systems -- 6.2.1 Multiaccess water- lling principle -- 6.2.2 Multiuser rate maximization -- 6.2.3 Max-min multiuser rate maximization -- 6.2.4 Multiuser margin maximization -- 6.2.5 Subcarrier assignment through average channel signal-to-noise ratio -- 6.3 Dynamic resource allocation for MIMO-OFDMA -- 6.4 Cross-layer design -- 7. Peak-to-Average Power Ratio (PAPR) Reduction -- 7.1 PAPR definitions -- 7.2 Continuous-time and discrete-time PAPR -- 7.3 Statistical properties of PAPR -- 7.4 Amplitude clipping -- 7.4.1 Clipping and ltering of oversampled signals -- 7.4.2 Signal-to-clipping noise ratio -- 7.4.3 Clipping noise mitigation -- 7.5 Selected mapping (SLM) technique -- 7.6 Partial transmit sequence (PTS) technique -- 7.7 Coding -- 7.8 Tone reservation and injection techniques -- 7.8.1 Tone reservation (TR) -- 7.8.2 Tone injection (TI) -- 7.9 PAPR reduction for OFDMA -- 7.9.1 SLM for OFDMA -- 7.9.2 PTS for OFDMA -- 7.9.3 TR for OFDMA -- 7.10 Design of AGC unit -- Bibliography -- Index.