Multi-Antenna Broadcast Channels with Limited Feedback and User Selection

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