IMPROVED PERFORMANCE OF THE V-BLAST SYSTEMBY MODIFYING THE CHANNEL MATRIX

摘要

MIMO system (multiple antennas at the transmitter andreceiver) is capable of very high theoretical capacities. As animportant space-time code, V-BLAST (Vertical-Bell Lab LayeredSpace-Time) code has been researched recently. The criticalresearch topics of V-BLAST system are to reduce the complexityand to increase the system performance. In this paper, weinvestigate the effect of modified channel matrix on the systemperformance. Two nulling criterions Zero-Forcing (ZF) andMinimum Mean Square Error (MMSE) are analyzed. We alsoperform simulation to verify the analysis.