We study the important problem of resource allocation for the downlink of Multiple-Input Multiple output (MIMO) Multicast\r\nWireless Systems operating over frequency-selective channels and we propose a low-complexity but efficient resource allocation\r\nalgorithm for MIMO-enabled OFDMA systems. The proposed solution guarantees a minimum spectrum share for each user\r\nwhile also takes advantage of the multicast transmission mode. The presence of multiple antennas in both transmitter and receiver\r\noffers spatial diversity to the system along with the frequency diversity added by the OFDMA access scheme. The computational\r\ncomplexity is reduced from exponential to linear and validation of the proposed solution is achieved through various simulation\r\nscenarios in comparison with other multicast and unicast reference schemes used in MIMO-OFDMA systems. Numerical results\r\nand complexity analysis demonstrate the feasibility of the proposed algorithm.
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