《OFDM技术开发系列》（英文版） Space-time and space-frequency coded orthogonal frequency division multiplexing transmitter diversity techniques.

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Space-Time and Space-Frequency Coded Orthogonal Frequency Division Multiplexing Transmitter Diversity Techniques A Thesis Presented to The Academic Facult by King F.Lee In Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy in Electrical Engineering Georgia Institute of Technology April 2001 Copyright 2001 by King F.Lee

UMI Number: 3032453 Copyright 2001 by . ee, King F. All rights reserved. UMI UMI Microform 3032453 Copyright 2002 by Bell Howell Information and Learning Company All rights reserved. This microform edition is protected again unauthorized copying under Title 17, United States Code Bell Howell Information and Learning Company 300 North Zeeb Road Ann Arbor. MI 48106-1346

Space-Time and Space-Frequency Coded Orthogonal Frequency Division Multiplexing Transmitter Diversity Techniques approved Professor Douglas B. williams, Chairman A Professor Yea Date approved by Chairman 1 17/2o

Acknowledgements First, i would like to thank my thesis advisor Professor Doug williams for his patience, invaluable guidance, stimulating discussions, and helpful suggestions throughout this I would also like to thank the other members of my thesis committee, Professors Mary Ingram, Ye(Geoffrey) Li, James McClellan, and Tom Morley for their time and valuable comments and suggestions I am fortunate to have worked for a number of very supportive managers: Jaime Borras. Ed Clark, Bill O Connor, Walt Davis, and Barry Herold. It is my pleasure to express my sincere gratitude to them for their encouragement and support Most importantly, I would like to thank my wife for her love, support, and sacrifices. Without her constant encouragement, it would have been impossible to complete this journey

Contents Acknowledgements List of Tables List of Figures vIll Summary Xlll 1 Introduction Background 2.1 Mobile Communication Channels 2. 1. 1 Modeling of Multipath Fading Channels 2.1.2 Simulation of Multipath Fading Channels 2.1.2.1 Filtered White Noise Method 2.1.2.2 Jakes' Method 2.1.2.3 Simulation of Frequency-Selective Fading Channels 2.2 Diversity Techniques 2.2.1 Transmitter diversity 2.2.2 Space-Time Block-Coded Transmitter Diversity

2.3 Orthogonal Frequency Division Multiplexing 3 OFDM Transmitter Diversity Systems 3. 1 Space-Time Block-Coded OFDM Systems 3.2 Space-Frequency Block-Coded OFDM Systems 623 3.3 Chapter Summary 4 Bandwidth Efficient OFDM Transmitter Diversity Systems 4.1 Iterative Space-Frequency Block-Coded OFDM Systems 4.2 Iterative Space-Time Block-Coded OFDM Systems 4.3 Computational Complexity 186的 4.4 Chapter Summary 5 Channel Estimation for OFDM Transmitter Diversity Systems 5.1 Channel Estimation for Space-Time and Space-Frequency Block-Coded OFDM Systems 5.1.1 Pilot Symbols for Multiple 75 5.1.2 Interpolation of Channel Parameters for Multiple Transmitter oFDM Syster 5.1.3 Performance of Pilot-Symbol-Assisted Channel Estimators . 85 5.1.4 Comparison with Decision-Directed MMSE Channel Estimator 91 5.2 Channel Estimation for Iterative Space-Time and Space-Frequency Block-Coded OFDM Syste 5.3 Chal 104

6.1 Contributions 6.2 Future Work Bibliography 110 117 v

List of Tables 2.1 COST207 six-ray power delay profles. 2.2 Maximal rates for space-time block codes 2.3 Transmission pattern of the g2 space-time block code 4.1 Computational complexity of the ISTBC-OFDM algorithm 4.2 Computational complexity of the ISFBC-OFDM algorithm 5.1 Computational complexities of the PSa channel estimator and the decision-directed MMSE channel estimator