Performance analysis of multiple input multiple output multicarrier code division multiple access and multiple input multiple output space time coding orthogonal frequency division multiple access systems

The rapid demand for broadband wireless access with fast multimedia servicesinitiated a vast research on the development of new wireless systems that will provide high spectral e_ciencies and data rates. Potential candidates for future generation wireless systems are multi-carrier code division multiple access (MC-CDMA) and Orthogonal Frequency-Division Multiple Access (OFDMA). To achieve higher user capacities and increase the system data rate, various multiple-input multiple-output (MIMO) technologies such as spatial multiplexing and spatial diversity techniques have been proposed recently and combined with MC-CDMA and OFDMA.In this work we also compare the error rate performance and SNR values between MIMO OFDMA and MIMO-MC-CDMA when they are combined with ?Alamouti Coding and ZF and MMSE receivers. And we saw MIMO MC-CDMA demonstrates a better performance over MIMO OFDMA under low system loads whereas in high system loads, MIMO OFDMA outperforms MIMO MC-CDMA. Furthermore we saw MMSE receiver performance is beter than ZF on the same base.