Degrees of Freedom Regions of Two-User MIMO Z and Full Interference Channels: The Benefit of Reconfigurable Antennas

dc.contributor.author Ke, Lei
dc.contributor.author Wang, Zhengdao
dc.contributor.department Electrical and Computer Engineering
dc.date 2020-11-20T18:30:47.000
dc.date.accessioned 2021-02-25T17:18:29Z
dc.date.available 2021-02-25T17:18:29Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.issued 2012-06-01
dc.description.abstract <p>We study the degrees of freedom (DoF) regions of two-user multiple-input multiple-output Z and full interference channels in this paper. We assume that the receivers always have perfect channel state information. We first derive the DoF region of Z interference channel with channel state information at transmitter (CSIT). For full interference channel without CSIT, the DoF region has been fully characterized recently and it is shown that the previously known outer bound is not achievable. In this paper, we investigate the no-CSIT case further by assuming that one transmitter has the ability of antenna mode switching. We obtain the DoF region as a function of the number of available antenna modes and reveal the incremental gain in DoF that each additional antenna mode can bring. It is shown that, in certain cases, the reconfigurable antennas can increase the DoF. In these cases, the DoF region is maximized when the number of modes is at least equal to the number of receive antennas at the corresponding receiver, in which case the previous outer bound is achieved. In all cases, we propose systematic constructions of the beamforming and nulling matrices for achieving the DoF region. The constructions bear an interesting space-frequency coding interpretation.</p>
dc.description.comments <p>This is a manuscript of an article published as Ke, Lei, and Zhengdao Wang. "Degrees of freedom regions of two-user MIMO Z and full interference channels: The benefit of reconfigurable antennas." <em>IEEE Transactions on Information Theory</em> 58, no. 6 (2012): 3766-3779. DOI: <a href="https://doi.org/10.1109/TIT.2012.2185483" target="_blank">10.1109/TIT.2012.2185483</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ece_pubs/279/
dc.identifier.articleid 1282
dc.identifier.contextkey 20253454
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ece_pubs/279
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/93986
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ece_pubs/279/2012_WangZhengdao_DegreesFreedomRegionsTwo.pdf|||Fri Jan 14 23:08:18 UTC 2022
dc.source.uri 10.1109/TIT.2012.2185483
dc.subject.disciplines Computer Sciences
dc.subject.disciplines Electrical and Computer Engineering
dc.subject.keywords Antenna mode switching
dc.subject.keywords degrees of freedom (DoF) region
dc.subject.keywords interference channel
dc.subject.keywords multiple-input multiple-output (MIMO)
dc.subject.keywords reconfigurable antenna
dc.title Degrees of Freedom Regions of Two-User MIMO Z and Full Interference Channels: The Benefit of Reconfigurable Antennas
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication b7a82e2a-7fd1-4c26-85f1-64be3e645430
relation.isOrgUnitOfPublication a75a044c-d11e-44cd-af4f-dab1d83339ff
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