Reconfigurable MIMO transceiver design using the tunable channel decomposition

Available spectrum resources are becoming scarcer, while additional services are being integrated into wireless devices. Cognitive radio and multiple-antenna (MIMO) techniques can be combined to provide a solution to this dilemma. Given the currently available frequency bands and a set of bit-rate constrained services to be transmitted, the antennas can be partitioned among frequency bands and the recently proposed tunable channel decomposition (TCD) may be applied to obtain subchannels having prescribed gains. We present a reconfigurable closed-loop transceiver design which can adapt to various partitioning scenarios. As a result, our system has the potential to deliver the required services with reduced transmitting power.