Limited feedback schemes for downlink OFDMA based on sub-channel groups

  title={Limited feedback schemes for downlink OFDMA based on sub-channel groups},
  author={Jieying Chen and Randall Berry and Michael L. Honig},
  journal={IEEE Journal on Selected Areas in Communications},
In a downlink orthogonal frequency division multiple access (OFDMA) system, optimally allocating sub-channels across mobile users can require excessive feedback of channel state information (CSI). We consider an OFDMA model in which the feedback overhead is explicitly taken into account, given a fixed feedback rate and finite coherence time. The tradeoff between feedback rate and sum capacity is studied for two limited feedback schemes: a sequential scheme in which the users send compressed… CONTINUE READING
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