  Spatial diversity technique enables improvement in quality and reliability of
wireless link. Antenna diversity along with understanding effects of channel on
transmitted signal and methods to overcome the channel impairment plays an
important role in wireless communication where sharing of channel occurs
between users. In this paper single input single output system (SISO) is
compared with multiple input multiple output system (MIMO) in terms of bit
error rate performance. Bit error rate performance is also evaluated for MIMO
with least squares (LS) and Minimum mean square error (MMSE) linear detection.
Further analysis and simulation is done to understand the effect of channel
imperfections on BER.
