Prediction in theory shows that data rate can be efficiently further raised by adding multiple antennas to both of the transmitter and receiver in addition to expanding transmission bandwidth, forming so called Multiple-Input Multiple-Output (MIMO) system. However, improper channel modeling, such as lacking in consideration of correlation in channels between antennas, may leads to over-optimistic results. In this thesis several analytic MIMO channel models are reviewed. Emphasis is laid on the model proposed by Weichselberger et al. since it encompasses various analytic models. In addition to the math formulation, the physical interpretation is proposed to link the model parameters to physical wave propagation phenomenon. With MIMO channel capacity as evaluation metric, and the MIMO OFDM-based channel sounder developed with general-purposed equipments, the validity of both physical interpretation and the statistical behavior of the model are examined in an outdoor-to-indoor environment. In addition, with the model parameters estimated with measurement results, one may have a view on the characteristics of MIMO channel seen by the system with some specific configurations.