LTE Codebook Capacity Loss for Single-Cell Multi-User MIMO Channels Conference Paper uri icon

abstract

  • Multi-user downlink MIMO communication has the potential to increase throughput using efficient beamforming. However, the precoding criteria assume perfect knowledge of the beamforming matrices at the base station (BS). This requires a user to transmit its complete channel information to the BS, a task that entails significant overhead. Limited feedback precoding, a part of LTE standardization now, needs only limited information be fed back to the BS. This paper studies the capacity loss incurred by using LTE codebooks, under different power allocation schemes with varying degrees of optimality. The sub-optimal power allocation schemes also ensure a better throughput-fairness trade-off. It is observed that using LTE codebooks results in a significant loss and that there is a need to develop codebooks which offer better adaptation to channel variations. 2012 IEEE.

name of conference

  • 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC)

published proceedings

  • 2012 IEEE 23RD INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)

author list (cited authors)

  • Ahmad, A., Papathanassiou, A., Serpedin, E., Smith, P., & Shafi, M.

citation count

  • 2

complete list of authors

  • Ahmad, Aitzaz||Papathanassiou, Apostolos||Serpedin, Erchin||Smith, Peter||Shafi, Mansoor

publication date

  • September 2012