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Turbo equalization algorithms have been used to effectively improve the performance in MIMO OFDM systems. To improve the estimated accuracies of channel matrix, an iterative estimation using soft decided signals and pilots was proposed. Furthermore, a new iterative equalization method based on subtracting interference terms, it is a maximum a posterior probability (MAP) MMSE algorithm and has lower complexity than traditional algorithms. Simulation results indicate that the proposed methods can yield remarkable improvements in performance after no less than two iterations.