MIMO-OFDMA Rate Allocation and Beamformer Design Using a Multi-Access Channel Framework

Provided by: University of Toledo
Topic: Mobility
Format: PDF
This paper tackles the downlink user scheduling and transmit beamforming problems in MIMO-OFDMA by extending a recent algorithm that maximizes the Weighted Sum Rate (WSR) to all users in MIMO flat fading channels. The proposed method has a complexity that is proportional to the number of OFDMA subcarriers, which makes it practically attractive. Having assigned users to each subcarrier and designed beamformers for each user in each subcarrier, it remains to find the best, in terms of rate maximization, Adaptive Modulation and Coding (AMC) mode to use for each data stream.

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