A Comparison Between Unitary and Non-Unitary Precoder Design for MIMO Channels with MMSE Detection and Limited Feedback
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1918211
- author
- Kapetanovic, Dzevdan LU and Rusek, Fredrik LU
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 2010 IEEE Global Telecommunications Conference Globecom 2010
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE Global Telecommunications Conference GLOBECOM 2010
- conference location
- Miami, FL, United States
- conference dates
- 2010-12-06 - 2010-12-10
- 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
- 2016-04-01 15:06:38
- date last changed
- 2022-01-28 04:32:09
@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}}, }