Performance analysis of MIMO-OFDM using V-BLAST Detector for High Data Rate SDR

The main goal in developing new wireless communication systems are increasing the transmission capacity and improving the spectrum efficiency. Space-time codes and spatial multiplexing codes exploit the richly scattered wireless channel by using multiple transmit and receive antennas in order to improve the reliability of data transfer and greatly increase the data transmission rates without additional radio resource requirements. Significant performance gain is achieved by varying some transmit and receive parameters. Multiple-input multiple-output (MIMO) is an existing technique that can significantly increase throughput of the system by employing multiple antennas at the transmitter and the receiver. Realizing maximum benefit from this technique requires computationally intensive detectors which poses significant challenges to receiver design. Furthermore, a multiple detectors are needed to handle different configurations. . One such receiver is the V-BLAST (Vertical Bell-Laboratories Layered Space-Time) which utilizes a layered architecture and applies successive cancellation by splitting the channel vertically, and at every stage the stream with the highest signal to noise ratio (SNR) is decoded.