| Preface | p. xiii |
| Acknowledgments | p. xv |
| Introduction | p. 1 |
| Wireless Technology in the Future | p. 1 |
| WWANs | p. 3 |
| WLANs | p. 4 |
| WPANs | p. 5 |
| WB-PANs | p. 6 |
| The Next Generation | p. 7 |
| Orthogonal Frequency-Division Multiplexing | p. 11 |
| History of OFDM | p. 11 |
| Concluding Remarks | p. 14 |
| References | p. 16 |
| WLANs | p. 19 |
| Introduction | p. 19 |
| WLANs in a Nutshell | p. 21 |
| IEEE 802.11, HIPERLAN/2, and MMAC WLAN Standards | p. 23 |
| MAC in WLAN Standards | p. 27 |
| IEEE 802.11 | p. 27 |
| HIPERLAN/2 | p. 31 |
| QoS over WLANs | p. 33 |
| IEEE 802.11e | p. 33 |
| Interframe Spacing | p. 35 |
| Other QoS-Related Developments | p. 36 |
| Security in IEEE 802.11 | p. 36 |
| Current IEEE 802.11 | p. 36 |
| IEEE 802.11i and IEEE 802.11f | p. 39 |
| References | p. 43 |
| ISM Bands | p. 46 |
| Comparison of WLAN and WPAN Standards | p. 47 |
| WPANs | p. 49 |
| Introduction | p. 49 |
| Emergence of Personal Area Networking (The Person-Centered Concept) | p. 49 |
| Technical Challenges of a WPAN Technology | p. 54 |
| Ad Hoc Connectivity | p. 55 |
| Service Discovery and Resource Selection | p. 56 |
| Enabling Technologies | p. 57 |
| Comparison of Short-Range Wireless Technologies | p. 60 |
| Ongoing Research | p. 60 |
| Architecture and Middleware Issues | p. 60 |
| Research Issues for Future WPAN Technology | p. 73 |
| References | p. 76 |
| Appropriate Channel Model for OFDM Systems | p. 83 |
| Introduction | p. 83 |
| Characterization of the Mobile Radio Channel | p. 84 |
| Components of a Multipath Channel Model | p. 84 |
| Definitions | p. 85 |
| Variation of Channel Parameters Due to Bandwidth Limitation | p. 90 |
| FD Channel Modeling | p. 90 |
| The WSSUS Channel Model | p. 91 |
| Channel Description | p. 94 |
| Relation to (Physical) Channel Parameters | p. 95 |
| FD Channel Simulation | p. 97 |
| Model Description | p. 98 |
| Implementation of the Simulation Scheme | p. 99 |
| FD Simulation Results | p. 100 |
| Differences from Time-Domain Simulation Schemes | p. 104 |
| Application to Millimeter-Wave Radio Channels | p. 104 |
| Discussion of Measurement Results | p. 105 |
| Discussion of Channel Parameters | p. 106 |
| Overview of Channel Models | p. 110 |
| Applicability of the FD Model | p. 111 |
| Conclusions | p. 112 |
| References | p. 114 |
| Basics of OFDM and Synchronization | p. 117 |
| Introduction | p. 117 |
| OFDM Introduction and System Model | p. 117 |
| OFDM Introduction and Block Diagram | p. 118 |
| Design of the OFDM Signal | p. 120 |
| OFDM System Model | p. 123 |
| Synchronization Errors | p. 128 |
| Performance of an Uncoded OFDM System | p. 133 |
| Mathematical Modeling | p. 133 |
| Analytical Evaluation of the BER | p. 134 |
| Performance Results | p. 141 |
| Conclusions and Recommendations | p. 144 |
| References | p. 146 |
| The Peak Power Problem | p. 149 |
| Introduction | p. 149 |
| Distribution of the PAP Ratio | p. 150 |
| Clipping and Peak Windowing | p. 152 |
| Required Backoff with a Nonideal Power Amplifier | p. 155 |
| Coding and Scrambling | p. 158 |
| Peak Cancellation | p. 160 |
| PAP Reduction Codes | p. 166 |
| Generating Complementary Codes | p. 167 |
| Minimum Distance of Complementary Codes | p. 171 |
| Maximum-Likelihood Decoding of Complementary Codes | p. 172 |
| Suboptimal Decoding of Complementary Codes | p. 174 |
| Large Code Lengths | p. 177 |
| Symbol Scrambling | p. 177 |
| References | p. 180 |
| A Novel Hybrid OFDM Concept | p. 183 |
| Introduction | p. 183 |
| Detailed Structure of Various Multiple-Access Schemes | p. 184 |
| Overview of Various Modulation Schemes | p. 184 |
| DS-CDMA | p. 187 |
| SFH Interface | p. 188 |
| OFDM/CDMA/SFH System Description | p. 191 |
| Summary | p. 197 |
| Comparison to MC-CDMA | p. 197 |
| Background | p. 198 |
| Basic Principles of MC-CDMA | p. 198 |
| The Hybrid System | p. 201 |
| Comments on the MC-CDMA Technique | p. 202 |
| Summary | p. 205 |
| Analytical Performance in Fading Channels and Simulation in AWGN Channels | p. 206 |
| Comparison of DS-CDMA and DS-CDMA-SFH (DS-SFH) Systems | p. 206 |
| Noncoherent Class of Signals (DS-CDMA) | p. 206 |
| DS-CDMA-SFH | p. 208 |
| Coherent Class of Signals | p. 211 |
| OFDM-CDMA-SFH (Hybrid) | p. 211 |
| Simulations | p. 213 |
| Summary | p. 214 |
| Performance in Fading Channels with Perfect Estimation | p. 215 |
| FD Modeling | p. 215 |
| Analytical Evaluation of the BER | p. 216 |
| Coherent Detection with Perfect Channel Estimation | p. 218 |
| Calculation of the Parameters | p. 219 |
| Simulations with Perfect Channel Estimation | p. 220 |
| Summary | p. 229 |
| Performance in Fading Channels with Realistic Estimation | p. 229 |
| Baseband Model | p. 230 |
| Channel Estimation with TDP Method | p. 231 |
| Simulated OFDM System Parameters | p. 235 |
| Simulation Results for QPSK/16-QAM | p. 235 |
| Summary | p. 237 |
| Conclusions | p. 239 |
| References | p. 239 |
| A Practical OFDM System: Fixed Broadband Wireless Access (FBWA) | p. 243 |
| Introduction | p. 243 |
| Motivation | p. 243 |
| Cell-Based Infrastructure | p. 244 |
| Mesh Topology-Based Infrastructure | p. 245 |
| Proposed FBWA | p. 245 |
| Systems Requirements | p. 248 |
| Parameter Selection | p. 249 |
| Communications Protocol | p. 249 |
| Duplex Schemes | p. 250 |
| Downlink Transmission | p. 250 |
| Uplink Transmission | p. 252 |
| Frame Structure | p. 253 |
| MAC Consideration and Conformance | p. 254 |
| Adaptability of the Proposed Kernel Architecture to BWAS | p. 256 |
| Summary | p. 256 |
| Ubiquitous Connectivity | p. 256 |
| References | p. 258 |
| About the Author | p. 261 |
| Index | p. 263 |
| Table of Contents provided by Rittenhouse. All Rights Reserved. |
