Space Correlation Based Joint Admission Control in Cognitive MIMO Systems

A joint transmit-receive admission control strategy based on spatial information in cognitive MIMO systems is proposed. By exploiting space correlation features between cognitive transmission and interference from cognitive base station (CBS) to primary user (PU) as well as from primary base station (PBS) to cognitive user (CU), appropriate primary system and its channel are selected. Then spectrum sharing is carried out employing signal subspace orthogonal projection. Simulation results show that the proposed scheme could achieve near-optimal system throughput performance with reduced complexity.