Implementation of MIMO-OFDM using adaptive multiuser detection in wireless communication

High data-rate wireless access is demanded by many applications. In a bid to cope with challenges of increasing demand for higher data rate, better quality of service and higher network capacity, there is a migration from Single Input Single Output (SISO) antenna technology to a more promising Multiple Input Multiple Output (MIMO) antenna technology. OFDM combined with MIMO increases the diversity gain and enhances system performance. Adaptive Receivers are employed in MIMO-OFDM systems (AMUD MIMO-OFDM) to achieve a better performance. In this paper, simulation results are obtained for SISO-OFDM, MIMO-OFDM and AMUD MIMO-OFDM for 2×2 and 4×4 antennas and the capacity results are obtained for different antenna configurations and for SISO-OFDM, MIMO-OFDM and AMUD MIMO-OFDM. The simulation results show that AMUD MIMO-OFDM performs better when compared to SISO-OFDM and MIMO-OFDM in terms of Bit Error Rate (BER) and Signal to Noise Ratio (SNR).