Comparative Analysis Between BPSK and QPSK Modulation Technique Based on BER Analysis using V-BLAST Based MMSE Technique

Abstract: The rich-scattering wireless channel is capable of huge theoretical capacities. The multiple input multiple output (MIMO) antenna system provides very promising gain in capacity without increasing the use of frequency spectrum, throughput, and power consumption in wireless communication. This also shows less sensitivity to fading, hence it leads to a breakthrough in the data rate of wireless communication systems. There are many schemes that can be used to MIMO systems such as space-time block code, space-time trellis code, and the Vertical Bell Labs Space- Time Architecture (V-BLAST). The V-BLAST is an ordered successive cancellation method applied to receiver and at every stage the stream with the highest SNR is decoded. In this proposes paper the analysis and performance of general MIMO system V-BLAST architecture with MMSE technique is used for linear detectors in fading channels with different antenna selections and digital modulation methods. In this proposed paper a comparative analysis between bpsk and qpsk modulation technique is given.

Keywords: MIMO, SIC, V-BLAST, MMSE.