IMPROVED PERFORMANCE OF THE V-BLAST SYSTEM BY MODIFYING THE CHANNEL MATRIX

摘要

MIMO system (multiple antennas at the transmitter and receiver) is capable of very high theoretical capacities. As an important space-time code, V-BLAST (Vertical-Bell Lab Layered Space-Time) code has been researched recently. The critical research topics of V-BLAST system are to reduce the complexity and to increase the system performance. In this paper, we investigate the effect of modified channel matrix on the system performance. Two nulling criterions Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) are analyzed. We also perform simulation to verify the analysis.