MMSE-V-BLAST Optimal-Ordering In Different Channels

The Bell Labs layered space–time (BLAST) algorithm is simple, and hence, a popular choice for a multiple-input-multiple-output (MIMO) receiver. Because of the difficulties that arise due to the optimal ordering in terms of BER, while considering real analytical evaluations, the one and only solution is by introducing OSIC schemes to improve the performance of the system in terms of BER. In this article we are improving the performance of the system in terms of BER; by introducing OSIC schemes along with the Minimum Mean Square Error detector that also combat the error propagation of the system. We have also analyzed the BER performance of these MIMO schemes using different modulation techniques like BPSK, QPSK and 16 QAM with different antenna configurations in classical independent identically distributed (i.i.d) Rayleigh fading channel and Rician fading channel. Finally we observed that BPSK and QPSK modulation techniques give the almost same result in VBLAST with the given detection technique in both the channels and 16-QAM modulation technique gives the worst result. We have also concluded that as we keeping number of receiving antennas more than transmitting antenna we get better BER performance that means we can remove the more errors. If number of transmitting antennas are more than receiving antennas we get worst BER performance that means we can remove fewer errors.