Abstract:

A space-frequency equalization receiver scheme is proposed for space-time block-coded multiple-input multiple-output (STBC-MIMO) systems. The scheme exploits transmit diversity through grouping of the transmit antennas of MIMO systems and implementation of block level space-time block-coding for each group. Subsequently, the processed independent signals of each group are radiated from the respective two transmit antennas. Also, at the receiver, the single-carrier frequency-domain equalization and the successive interference cancellation (SIC) are used to combat with various interferences resulting from the frequency selective MIMO - code division multiple access (CDMA) channels. In addition, the channel estimation errors and the computational complexities are considered. It is shown that the proposed systems significantly outperform the traditional ones while the receiver is still simple.

Key words: multiple-input multiple-output, space-time block-coded, space-frequency equalization, successive interference cancellation