Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) has been proposed for many emerging standards and seems to be a promising solution for future high data rate wireless communications. In the first part of this thesis, a novel sub-optimum detection method called unified successive interference cancellation (U-SIC) for spatially multiplexed multicarrier code division multiplexing (SM-MC-CDM) transmission is proposed. It is shown that compared I would like to

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... ress my profound appreciation and sincere gratitude to my advisor, Dr. Witold A. Krzymień, for his guidance, patience and support throughout this work. I am very grateful for his insights and advice. I would also like to thank Dr. Xiaodai Dong for her support and guidance during the first two years of my Ph.D. program. I would like to thank my advisory committee and candidacy examination com-