... describes the basic OFDM system model and MIMO system model. The wireless channel model, the principles of OFDM and MIMO systems, the combination of MIMO and OFDM, that is, MIMO-OFDM system is also introduced ... Telecommunications System (UMTS), and CDMA2000. LTE also adopts OFDM and MIMO technologies in the physical layer. It uses a 2 by 2 MIMO system as the basic configuration, that is, both the base station and ... Advanced and is currently being standardized by 3rd Generation Partnership Project (3GPP) organization. The thesis studies two issues: channel estimation for OFDM systems and MIMO-OFDM system...