On Precoding for High Spatial Rate Space-Time Codes

MIMO wireless systems have been studied over the past few years due to the promise of increased capacity and reliability. Additional performance gains are possible when channel state information is available at the transmitter (CSI-T). In this work, we consider the case of partial CSI-T (channel transmit covariance) and revisit precoder design for high rate space-time codes which do not have a unique minimum error matrix. Using a set of minimum error matrices combined with traditional MIMO precoder design results in improved performance over that of previous design techniques based a single minimum error matrix.