Signal-Perturbation-Free Semi-Blind Channel Estimation for MIMO-OFDM Systems
نویسنده
چکیده
Signal-Perturbation-Free Semi-Blind Channel Estimation forMIMO-OFDM Systems Feng Wan, Ph.D.Concordia University, 2009 Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) has been considered as a strong candidate for the beyond 3G (B3G) wirelesscommunication systems, due to its high data-rate wireless transmission performance.It is well known that the advantages promised by MIMO-OFDM systems rely on theprecise knowledge of the channel state information (CSI). In real wireless environ-ments, however, the channel condition is unknown. Therefore, channel estimation isof crucial importance in MIMO-OFDM systems.Semi-blind channel estimation as a combination of the training-based or pilot-assisted method and the pure blind approach is considered to be a feasible solutionfor practical wireless systems due to its better estimation accuracy as well as spec-tral efficiency. In this thesis, we address the semi-blind channel estimation issue ofMIMO-OFDM systems with an objective to develop very efficient channel estimationapproaches.In the first part of the dissertation, several nulling-based semi-blind approachesare presented for the estimation of time-domain MIMO-OFDM channels. By incor-porating a blind constraint that is derived from MIMO linear prediction (LP) into a
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