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dc.contributor.authorLu, Hsiao-feng (Francis)en_US
dc.contributor.authorVehkalahti, Roopeen_US
dc.contributor.authorHollanti, Camillaen_US
dc.contributor.authorLahtonen, Jyrkien_US
dc.contributor.authorHong, Yien_US
dc.contributor.authorViterbo, Emanueleen_US
dc.date.accessioned2014-12-08T15:08:08Z-
dc.date.available2014-12-08T15:08:08Z-
dc.date.issued2009-12-01en_US
dc.identifier.issn1932-4553en_US
dc.identifier.urihttp://dx.doi.org/10.1109/JSTSP.2009.2035801en_US
dc.identifier.urihttp://hdl.handle.net/11536/6354-
dc.description.abstractThis paper addresses the problem of constructing multiuser multiple-input multiple-output (MU-MIMO) codes for two users. The users are assumed to be equipped with n(t) transmit antennas, and there are n(r) antennas available at the receiving end. A general scheme is proposed and shown to achieve the optimal diversity-multiplexing gain tradeoff (DMT). Moreover, an explicit construction for the special case of n(t) = 2 and n(r) = 2 is given, based on the optimization of the code shape and density. All the proposed constructions are based on cyclic division algebras and their orders and take advantage of the multi-block structure. Computer simulations show that both the proposed schemes yield codes with excellent performance improving upon the best previously known codes. Finally, it is shown that the previously proposed design criteria for DMT optimal MU-MIMO codes are sufficient but in general too strict and impossible to fulfill. Relaxed alternative design criteria are then proposed and shown to be still sufficient for achieving the multiple-access channel diversity-multiplexing tradeoff.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.titleNew Space-Time Code Constructions for Two-User Multiple Access Channelsen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/JSTSP.2009.2035801en_US
dc.identifier.journalIEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSINGen_US
dc.citation.volume3en_US
dc.citation.issue6en_US
dc.citation.spage939en_US
dc.citation.epage957en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:000273568900005-
dc.citation.woscount6-
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