Investigation of hybrid MIMO techniques

The paper compares and investigates the performance of wireless local area network systems using multiple input multiple output (MIMO) techniques. In particular, two different algorithms, V-BLAST and space-time block coding (STBC), are described. A third, hybrid, approach, which incorporates elements of both V-BLAST and STBC, is also introduced. All three techniques are compared using both theoretical Shannon capacity analysis and by simulation results for the bit error ratio performance of the three methods. It is shown that the hybrid method attains superior diversity gain performance to V-BLAST and can outperform V-BLAST at spectral efficiencies of practical interest.