Analysis of V-BLAST Techniques for MIMO Wireless Channels with different modulation techniques using Linear and Non Linear Detection

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 spectrum, throughput, and power consumption. This is also less sensitivity to fading, hence leading to a breakthrough in the data rate of wireless communication systems. There are many schemes that can be applied to MIMO systems such as space time block codes, space time trellis codes, 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. This paper proposes the analysis and performance of general MIMO system V-BLAST architecture with Maximum Likelihood (ML), Zero-Forcing (ZF), QR decomposition and Minimum MeanSquare Error (MMSE), Ordered Successive Interference Cancellation (OSIC), Interference Suppression (IS) techniques used for linear detectors in fading channels with different antenna selections and digital modulation methods.