@article{10902/1577, year = {2010}, url = {http://hdl.handle.net/10902/1577}, abstract = {The design, implementation, and test of a real-time flexible 2×2 (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) MIMO-OFDM IEEE 802.16 prototype are presented. For the design, a channel measurement campaign on the 3.5GHz band has been carried out, focusing on outdoor-indoor scenarios. The analysis of measured channels showed that higher capacity can be achieved in case of obstructed scenarios and that (Channel Distribution Information at the Transmitter) CDIT capacity is close to (Channel State Information at the Transmitter) CSIT with much lower complexity and requirements in terms of channel estimation and feedback. The baseband prototype used an (Field Programmable Gate Array) FPGA where enhanced signal processing algorithms are implemented in order to improve system performance. We have shown that for MIMO-OFDM systems, extra signal processing such as enhanced joint channel and frequency offset estimation is needed to obtain a good performance and approach in practice the theoretical capacity improvements.}, organization = {The authors wish to thank David Díaz, Roberto Prieto, Antonio Morales, and Jose A. Rivas for their collaboration. ´ This work has been partly funded by projects MACAWI (TEC2005-07477-C02), MULTIADAPTIVE (TEC2008- 06327-C03-02), and MAMBO3 (CCG08-UC3M/TIC-4069).}, publisher = {Hindawi Publishing Corporation-}, publisher = {SpringerOpen}, publisher = {Eurasip Journal on Wireless Communications and Networking, 2010, 871291}, title = {A MIMO-OFDM testbed, channel measurements, and system considerations for outdoor-indoor WiMAX}, author = {Gil Jiménez, Víctor Pedro and Fernández-Getino García, María Julia and García Armada, Ana and Torres Jiménez, Rafael Pedro and García Fernández, Juan José and Sánchez Fernández, Matilde Pilar and Domingo Gracia, Marta and Fernández Fernández, Óscar}, }