In this paper, four novel loading algorithms are proposed for multicarrier systems employing spatial diversity. The objective of these algorithms is to increase system throughput while ensuring the mean bit error rate (BER) is below a specified limit. A subcarrier signal is transmitted simultaneously on a subset of antennas, passed through a multiple-input multiple output (MIMO) channel, intercepted by a subset of receive antennas, and linearly combined. Both antenna subset configurations may

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... ffer for each subcarrier. The rationale for this form of antenna selection is to efficiently distribute power across the antennas and to reduce array processing complexity. Bit loading is employed by two of the proposed algorithms to further increase throughput. Simulation results show a tradeoff between the allocation algorithm computational complexity and system throughput.