Detailed Mathematical Analysis and Performance Evaluation of MIMO-OFDM-CDMA System Using ZF Receiver

In this paper, we have presented the detailed mathematical analysis of the output signal to interference noise ratio (SINR) for MIMO-OFDM-CDMA system using joint space-time frequency (STF) spreading with ZF receiver. A 2x2 and 4x4 MIMO system is used for performance evaluation in terms of BER. The analysis shows that output SINR decreases, as the number of users increases. The average bit error probability of the system using ZF receiver is derived for different number of users. We also present exponential bound of the complementary error function (erfc) for probability of error. Simulation results of MIMO-OFDM-CDMA system are in line with the results obtained through mathematical analysis.