In this paper, orthogonal space-time block codes (OSTBC) are considered for investigating impact of receive antenna selection on the capacity and error probability analysis of multiple-input multiple-output (MIMO) systems. The results are compared with and without antenna selection of 2X2 and 2X4 MIMO systems. Achieved capacity with receive antenna selection for Nr ≥ NT has been found close to the capacity of full complexity system, whereas upper capacity bound is tight for Nr ≤ NT.