Effects of Channel Estimation Error on Array Processing Based QO-STBC Coded OFDM Systems

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Executive Summary

This paper concerns performance degradation caused by channel estimation error of Quasi-Orthogonal Space-Time Block (QO-STBC) Coded OFDM systems employing array processing decoder. The Least Square (LS) channel estimator is employed to obtain the required Channel State Information (CSI). Taking Mean Square Error (MSE) as a performance metric, the authors evaluate the LS estimator in MIMO-OFDM systems over frequency selective channels, and its impact on Symbol Error Rate (SER) by both analysis and simulations. MIMO-OFDM systems have been proposed as a promising technique for the future broadband wireless communications

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