Performance analysis of the VBLAST algorithm for MIMO-OFDMA systems on spatial correlated channels

This paper investigates the performance of Vertical Bell Laboratories Layered SpaceTime (V-BLAST) architecture for multi input multi output orthogonal frequency division multiple access (MIMO-OFDMA) system. VBLAST is a successive cancellation method applied to the receiver to obtain the highest SNR. Performance of MIMO systems in realistic radio environments greatly depends on the spatial correlation due to the presence of scatterers in the multipath propagation environments. The number of users using in the system are also analyzed. It is assumed that all antennas have same radiation pattern and the spatial correlation is independent on the position of an antenna in the array. Our results are simulated on Monte Carlo and One Ring channel model for 2×2 MIMO OFDMA system. From the results, we can see that VBLAST-ZF show the best SER performance in one ring channel model with long term evolution (LTE) standard.