Multi-Antenna Downlink Channels with Limited Feedback and User Selection

  title={Multi-Antenna Downlink Channels with Limited Feedback and User Selection},
  author={Taesang Yoo and Nihar Jindal and Andrea J. Goldsmith},
  journal={IEEE Journal on Selected Areas in Communications},
We analyze the sum-rate performance of a multi- antenna downlink system carrying more users than transmit antennas, with partial channel knowledge at the transmitter due to finite rate feedback. In order to exploit multiuser diversity, we show that the transmitter must have, in addition to directional information, information regarding the quality of each channel. Such information should reflect both the channel magnitude and the quantization error. Expressions for the SINR distribution and the… CONTINUE READING
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