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This paper presents a method of estimating channel parameters in wireless communications using space-time block coding (STBC). After reviewing the concept of STBC, the system model of radio communication with STBC is described and the estimation method is derived. System performances have been simulated using MATLAB. The results of the simulations show that the proposed algorithm of channel estimation is practical and effective as there is only a small discrepancy between the performances using the estimated and known channel parameters.