Precoding and loading for BLAST-like systems

In this contribution we study transmission over MIMO channels, where channel state information available at the transmitter enables the use of precoding as weak as an optimization of rate and power distribution over the parallel subchannels in the transmission system (loading). It is shown that spatial loading provides substantial gains and a revised version of the V-BLAST algorithm is given to calculate the matrix filters required for Tomlinson-Harashima precoding, or equivalently decision-feedback equalization.