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Conference Paper: Non-orthogonal transmission in multi-user systems with Grassmannian beamforming

TitleNon-orthogonal transmission in multi-user systems with Grassmannian beamforming
Authors
Issue Date2011
PublisherIEEE.
Citation
The IEEE International Conference on Communications (ICC) 2011, Kyoto, Japan, 5-9 June 2011. In Proceedings of IEEE-ICC, 2011, p. 1-5 How to Cite?
AbstractAiming to achieve the sum-rate capacity in multiuser multi-input multi-output (MIMO) channels with N t antennas implemented at the transmitter, opportunistic beamforming (OBF) generates N t orthonormal beams and serves N t users during each transmission, which results in high scheduling delay over the users, especially in densely populated wireless networks. Non-orthogonal OBF with more than N t transmit beams can be exploited to serve more users simultaneously and further decreases scheduling delay. However, the inter-beam interference will inevitably deteriorate the sum-rate. Therefore, there is a tradeoff between the sum-rate and the increasing number of transmit beams. In this context, the sum-rate of non-orthogonal OBF with N > N t beams are studied, where the transmitter is based on the Grassmannian beamforming. Our results show that non-orthogonal OBF is an interference-limited system. Moreover, when the inter-beam interference reaches its minimum for fixed N t and N, the sum-rate scales as N ln (N/N-N t) and it decreases monotonically with N for fixed N t. Numerical results corroborate the accuracy of our analyses. © 2011 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/134518
ISBN
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorXia, Men_HK
dc.contributor.authorWu, YCen_HK
dc.contributor.authorAissa, Sen_HK
dc.date.accessioned2011-06-17T09:27:04Z-
dc.date.available2011-06-17T09:27:04Z-
dc.date.issued2011en_HK
dc.identifier.citationThe IEEE International Conference on Communications (ICC) 2011, Kyoto, Japan, 5-9 June 2011. In Proceedings of IEEE-ICC, 2011, p. 1-5en_HK
dc.identifier.isbn978-1-61284-231-8-
dc.identifier.issn0536-1486en_HK
dc.identifier.urihttp://hdl.handle.net/10722/134518-
dc.description.abstractAiming to achieve the sum-rate capacity in multiuser multi-input multi-output (MIMO) channels with N t antennas implemented at the transmitter, opportunistic beamforming (OBF) generates N t orthonormal beams and serves N t users during each transmission, which results in high scheduling delay over the users, especially in densely populated wireless networks. Non-orthogonal OBF with more than N t transmit beams can be exploited to serve more users simultaneously and further decreases scheduling delay. However, the inter-beam interference will inevitably deteriorate the sum-rate. Therefore, there is a tradeoff between the sum-rate and the increasing number of transmit beams. In this context, the sum-rate of non-orthogonal OBF with N > N t beams are studied, where the transmitter is based on the Grassmannian beamforming. Our results show that non-orthogonal OBF is an interference-limited system. Moreover, when the inter-beam interference reaches its minimum for fixed N t and N, the sum-rate scales as N ln (N/N-N t) and it decreases monotonically with N for fixed N t. Numerical results corroborate the accuracy of our analyses. © 2011 IEEE.en_HK
dc.languageengen_US
dc.publisherIEEE.-
dc.relation.ispartofProceedings of the IEEE International Conference on Communicationsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsProceedings of the IEEE International Conference on Communications. Copyright © IEEE.-
dc.rights©2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.-
dc.titleNon-orthogonal transmission in multi-user systems with Grassmannian beamformingen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=978-1-61284-231-8&volume=&spage=1&epage=5&date=2011&atitle=Non-orthogonal+transmission+in+multi-user+systems+with+grassmannian+beamforming-
dc.identifier.emailWu, YC:ycwu@eee.hku.hken_HK
dc.identifier.authorityWu, YC=rp00195en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1109/icc.2011.5962841en_HK
dc.identifier.scopuseid_2-s2.0-80052160336en_HK
dc.identifier.hkuros185492en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052160336&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.spage1-
dc.identifier.epage5-
dc.description.otherThe IEEE International Conference on Communications (ICC) 2011, Kyoto, Japan, 5-9 June 2011. In Proceedings of IEEE-ICC, 2011, p. 1-5-
dc.identifier.scopusauthoridXia, M=24475596100en_HK
dc.identifier.scopusauthoridWu, YC=7406894786en_HK
dc.identifier.scopusauthoridAissa, S=6603400084en_HK

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