Advent of 2G saw a paradigm shift in the use of wireless technology. The desire for multimedia applications overshadowed the fundamental voice service but required higher data rates. Multiple input multiple output (MIMO) communication system promises efficient achievement of this requisite. Limited by Shannon bound, the data rates in single antenna systems are linearly related to the bandwidth. But employing multiple antennas allows capacity growth, linear in the number of antennas, without expansion in available bandwidth. This significant gain led MIMO into the candidate 4G standards; LTE and mobile WiMax. However, the simplified MIMO transmitted structure is coupled with a relatively complex receiver design. This book provides a comprehensive discussion on different multiple antenna configurations with focus centered on the state of art receiver designs. It details classical detection algorithms as well as lately proposed promising solutions with validated performances. This comparative analysis should help professionals to develop a thorough insight of advanced receiver designs. Novice researchers can also benefit from the book for a kick start towards their ultimate goal.