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

  title={Limited feedback schemes for downlink OFDMA based on sub-channel groups},
  author={J. Chen and R. Berry and M. Honig},
  journal={IEEE Journal on Selected Areas in Communications},
  • J. Chen, R. Berry, M. Honig
  • Published 2008
  • Computer Science
  • 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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