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dc.contributor.authorLu, Hsiao-feng (Francis)en_US
dc.contributor.authorHollanti, Camilla Johannaen_US
dc.contributor.authorVehkalahti, Roope Iikanpoikaen_US
dc.contributor.authorLahtonen, Jyrkien_US
dc.date.accessioned2014-12-08T15:44:51Z-
dc.date.available2014-12-08T15:44:51Z-
dc.date.issued2011-06-01en_US
dc.identifier.issn0018-9448en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TIT.2011.2136170en_US
dc.identifier.urihttp://hdl.handle.net/11536/30286-
dc.description.abstractExplicit code constructions for multiple-input multiple-output (MIMO) multiple-access channels (MAC) with K users are presented in this paper. The first construction is dedicated to the case of symmetric MIMO-MAC where all the users have the same number of transmit antennas n(t) and transmit at the same level of per-user multiplexing gain r. Furthermore, we assume that the users transmit in an independent fashion and do not cooperate. The construction is systematic for any values of K, n(t) and r. It is proved that this newly proposed construction achieves the optimal MIMO-MAC diversity-multiplexing gain tradeoff (DMT) provided by Tse et al. at high-SNR regime. In the second part of the paper we take a further step to investigate the MAC-DMT of a general MIMO-MAC where the users are allowed to have different numbers of transmit antennas and can transmit at different levels of multiplexing gain. The exact optimal MAC-DMT of such channel is explicitly characterized in this paper. Interestingly, in the general MAC-DMT, some users might not be able to achieve their single-user DMT performance as in the symmetric case, even when the multiplexing gains of the other users are close to 0. Detailed explanations of such unexpected result are provided in this paper. Finally, by generalizing the code construction for the symmetric MIMO-MAC, explicit code constructions are provided for the general MIMO-MAC and are proved to be optimal in terms of the general MAC-DMT.en_US
dc.language.isoen_USen_US
dc.subjectCyclic division algebras (CDAs)en_US
dc.subjectdiversity-multiplexing gain tradeoff (DMT)en_US
dc.subjectmultiple access channel (MAC)en_US
dc.subjectmultiple-input multiple-output (MIMO) channelen_US
dc.subjectspace-time block codes (STBCs)en_US
dc.titleDMT Optimal Codes Constructions for Multiple-Access MIMO Channelen_US
dc.typeArticle; Proceedings Paperen_US
dc.identifier.doi10.1109/TIT.2011.2136170en_US
dc.identifier.journalIEEE TRANSACTIONS ON INFORMATION THEORYen_US
dc.citation.volume57en_US
dc.citation.issue6en_US
dc.citation.spage3594en_US
dc.citation.epage3617en_US
dc.contributor.department電機工程學系zh_TW
dc.contributor.departmentDepartment of Electrical and Computer Engineeringen_US
dc.identifier.wosnumberWOS:000291003900031-
Appears in Collections:Conferences Paper


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