Utilization of lattice reduction approach in MIMO decoding

In this paper we investigate utilization of lattice-reduction (LR) approach for MIMO decoding in multiple antenna systems. We show how to expand LR method initially designed for real value lattices into complex lattices utilized in MIMO OFDM systems. We offer the two effective schemes of MIMO decoder based on complex LR, one generating hard bit output, while the other generating soft bit output. We show that proposed schemes demonstrate superior performance to conventional algorithms while having comparable complexity.