Cross-Layer Design for MIMO Spatial Multiplexing in Correlated Ricean Fading

In this paper, we investigate a cross-layer transmit antenna selection (T-AS) approach for multiple-input multiple- output spatial multiplexing (MIMO-SM) systems employing decision-feedback detector (DFD), over spatially correlated Ricean channels. The selected transmit antennas are those that maximize the link layer throughput of MIMO channels. A closed- form expression for the system throughput with perfect channel state information (CSI) is derived. Extensive simulation results are provided for the system performance assessment, showing that the cross-layer T-AS scheme always assigns the transmission to the antenna combination which sees better channel conditions, resulting in a substantial improvement over the optimal capacity- based T-AS approach.