A Low-complexity Power and Bit Allocation Algorithm for Multiuser MIMO-OFDM Systems
In this paper, we present a low-complexity bit and power
allocation algorithm for multiuser MIMO-OFDM downlink
transmission. In order to minimize the total transmit power under
the condition that users QoS requirements are satisfied, a novel
resource allocation scheme is proposed to exploit the multiuser
diversity gain. The proposed algorithm involves adaptive
subcarrier allocation, adaptive modulation and eigen
beamforming and achieves significant improvement in overall
system performance. Simulation results shows that the proposed
algorithm offers a similar performance and a lower complexity
than previous algorithms.
Keywords: Multiuser MIMO OFDM, SVD, bit and power allocation
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