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Article: Limited feedback beamforming over temporally-correlated channels

TitleLimited feedback beamforming over temporally-correlated channels
Authors
Issue Date2009
Citation
IEEE Transactions on Signal Processing, 2009, v. 57 n. 5, p. 1959-1975 How to Cite?
AbstractFeedback of quantized channel state information (CSI), called limited feedback, enables transmit beamforming in multiple-input-multiple-output (MIMO) wireless systems with a small amount of overhead. Due to its efficiency, beamforming with limited feedback has been adopted in several wireless communication standards. Prior work on limited feedback commonly adopts the block fading channel model where temporal correlation in wireless channels is neglected. In this paper, we consider temporally correlated channels and design single-user transmit beamforming with limited feedback. Analytical results concerning CSI feedback are derived by modeling quantized CSI as a first-order finite-state Markov chain. These results include the information rate of the CSI quantizer output, the bit rate a CSI feedback channel is required to support, and the effect of feedback delay on throughput. In particular, based on the theory of Markov chain convergence rate, feedback delay is proved to reduce the throughput gain due to CSI feedback at least exponentially. Furthermore, an algorithm is proposed for CSI feedback compression in time. Combining the results in this work leads to a new method for designing limited feedback beamforming as demonstrated by a design example. © 2009 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/194235
ISSN
2015 Impact Factor: 2.624
2015 SCImago Journal Rankings: 2.004
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHuang, K-
dc.contributor.authorHeath Jr, RW-
dc.contributor.authorAndrews, JG-
dc.date.accessioned2014-01-30T03:32:20Z-
dc.date.available2014-01-30T03:32:20Z-
dc.date.issued2009-
dc.identifier.citationIEEE Transactions on Signal Processing, 2009, v. 57 n. 5, p. 1959-1975-
dc.identifier.issn1053-587X-
dc.identifier.urihttp://hdl.handle.net/10722/194235-
dc.description.abstractFeedback of quantized channel state information (CSI), called limited feedback, enables transmit beamforming in multiple-input-multiple-output (MIMO) wireless systems with a small amount of overhead. Due to its efficiency, beamforming with limited feedback has been adopted in several wireless communication standards. Prior work on limited feedback commonly adopts the block fading channel model where temporal correlation in wireless channels is neglected. In this paper, we consider temporally correlated channels and design single-user transmit beamforming with limited feedback. Analytical results concerning CSI feedback are derived by modeling quantized CSI as a first-order finite-state Markov chain. These results include the information rate of the CSI quantizer output, the bit rate a CSI feedback channel is required to support, and the effect of feedback delay on throughput. In particular, based on the theory of Markov chain convergence rate, feedback delay is proved to reduce the throughput gain due to CSI feedback at least exponentially. Furthermore, an algorithm is proposed for CSI feedback compression in time. Combining the results in this work leads to a new method for designing limited feedback beamforming as demonstrated by a design example. © 2009 IEEE.-
dc.languageeng-
dc.relation.ispartofIEEE Transactions on Signal Processing-
dc.titleLimited feedback beamforming over temporally-correlated channels-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/TSP.2009.2014272-
dc.identifier.scopuseid_2-s2.0-65649116192-
dc.identifier.volume57-
dc.identifier.issue5-
dc.identifier.spage1959-
dc.identifier.epage1975-
dc.identifier.isiWOS:000265437900023-

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