LTE codebook capacity loss for single-cell multi-user MIMO channels

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

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.

Original languageEnglish
Title of host publication2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012
Pages1902-1906
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2012
Event2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012 - Sydney, NSW, Australia
Duration: 9 Sep 201212 Sep 2012

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012
CountryAustralia
CitySydney, NSW
Period9/9/1212/9/12

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Ahmad, A., Papathanassiou, A., Serpedin, E., Smith, P., & Shafi, M. (2012). LTE codebook capacity loss for single-cell multi-user MIMO channels. In 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012 (pp. 1902-1906). [6362663] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2012.6362663