A Feedback Reduction Technique for MIMO Broadcast Channels

  title={A Feedback Reduction Technique for MIMO Broadcast Channels},
  author={Nihar Jindal},
  journal={2006 IEEE International Symposium on Information Theory},
  • N. Jindal
  • Published 16 March 2006
  • Computer Science, Business
  • 2006 IEEE International Symposium on Information Theory
A multiple antenna broadcast channel with perfect channel state information at the receivers is considered. If each receiver quantizes its channel knowledge to a finite number of bits which are fed back to the transmitter, the large capacity benefits of the downlink channel can be realized. However, the required number of feedback bits per mobile must be scaled with both the number of transmit antennas and the system SNR, and thus can be quite large in even moderately sized systems. It is shown… 

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