Performance of zero-forcing MIMO systems with signal space diversity under transmit antenna correlation

In this work, signal space diversity (SSD) is incorporated into a zero-forcing multiple-input multiple-output system with various numbers of transmit and receive antennas. We assume that the number of antennas at both ends is equal and the channel state information is only available at the receiver. The performance of the proposed system is studied under a slow flat Rayleigh fading channel scenario with correlated transmit antennas and uncorrelated receive antennas. We adopt different realistic transmit antenna correlation models. A number of different component interleaving strategies are compared for these correlation models. It is shown that the error performance of the system can be significantly improved by making use of SSD with only a negligible increase in complexity and no extra use of bandwidth/time resources.