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A Comparison Between Unitary and Non-Unitary Precoder Design for MIMO Channels with MMSE Detection and Limited Feedback

Kapetanovic, Dzevdan LU and Rusek, Fredrik LU (2010) IEEE Global Telecommunications Conference GLOBECOM 2010 In 2010 IEEE Global Telecommunications Conference Globecom 2010
Abstract
This work studies the design of linear precoder codebooks for N-r x N-t MIMO channels with MMSE detection at the receiver. A natural split of precoder-design is unitary precoding and non-unitary precoding. Unitary precoding is only performing rotation of the data in a way beneficial for the channel. Non-unitary precoding additionally also uses power-loading to further improve the performance. Somewhat surprisingly, unitary precoding facilitates a performance boosting by a re-enumeration of the antenna elements at the receiver side that can not be accomodated in the non-unitary precoding setting. This operation leads to substantial performance gains. The question investigated in this paper is whether this re-enumeration can compensate for... (More)
This work studies the design of linear precoder codebooks for N-r x N-t MIMO channels with MMSE detection at the receiver. A natural split of precoder-design is unitary precoding and non-unitary precoding. Unitary precoding is only performing rotation of the data in a way beneficial for the channel. Non-unitary precoding additionally also uses power-loading to further improve the performance. Somewhat surprisingly, unitary precoding facilitates a performance boosting by a re-enumeration of the antenna elements at the receiver side that can not be accomodated in the non-unitary precoding setting. This operation leads to substantial performance gains. The question investigated in this paper is whether this re-enumeration can compensate for the lack of power-loading. The outcome is that for small precoder codebooks, unitary precoding performs as good as non-unitary, while for larger codebooks non-unitary precoding outperforms unitary precoding. (Less)
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author
organization
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
2010 IEEE Global Telecommunications Conference Globecom 2010
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE Global Telecommunications Conference GLOBECOM 2010
external identifiers
  • wos:000287977401124
  • scopus:79551652208
ISSN
1930-529X
language
English
LU publication?
yes
id
c3b85403-cda9-4daf-9e5b-46a81dc9131f (old id 1918211)
date added to LUP
2011-05-13 15:51:32
date last changed
2018-05-29 11:28:33
@inproceedings{c3b85403-cda9-4daf-9e5b-46a81dc9131f,
  abstract     = {This work studies the design of linear precoder codebooks for N-r x N-t MIMO channels with MMSE detection at the receiver. A natural split of precoder-design is unitary precoding and non-unitary precoding. Unitary precoding is only performing rotation of the data in a way beneficial for the channel. Non-unitary precoding additionally also uses power-loading to further improve the performance. Somewhat surprisingly, unitary precoding facilitates a performance boosting by a re-enumeration of the antenna elements at the receiver side that can not be accomodated in the non-unitary precoding setting. This operation leads to substantial performance gains. The question investigated in this paper is whether this re-enumeration can compensate for the lack of power-loading. The outcome is that for small precoder codebooks, unitary precoding performs as good as non-unitary, while for larger codebooks non-unitary precoding outperforms unitary precoding.},
  author       = {Kapetanovic, Dzevdan and Rusek, Fredrik},
  booktitle    = {2010 IEEE Global Telecommunications Conference Globecom 2010},
  issn         = {1930-529X},
  language     = {eng},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {A Comparison Between Unitary and Non-Unitary Precoder Design for MIMO Channels with MMSE Detection and Limited Feedback},
  year         = {2010},
}