Degrees of Freedom Region for an Interference Network with General Message Demands

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dc.contributor.author Wang, Zhengdao
dc.contributor.author Ke, Lei
dc.contributor.author Ramamoorthy, Aditya
dc.contributor.author Ramamoorthy, Aditya
dc.contributor.author Wang, Zhengdao
dc.contributor.author Yin, Huarui
dc.contributor.department Electrical and Computer Engineering
dc.date 2018-02-18T04:19:02.000
dc.date.accessioned 2020-06-30T02:02:04Z
dc.date.available 2020-06-30T02:02:04Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2012
dc.date.issued 2012-06-01
dc.description.abstract <p>We consider a single-hop interference network with <em>K</em> transmitters and <em>J</em> receivers, all having <em>M</em> antennas. Each transmitter emits an independent message and each receiver requests an arbitrary subset of the messages. This generalizes the well-known <em>K</em> -user <em>M</em>-antenna interference channel, where each message is requested by a unique receiver. For our setup, we derive the degrees of freedom (DoF) region. The achievability scheme generalizes the interference alignment schemes proposed by Cadambe and Jafar. In particular, we achieve general points in the DoF region by using multiple base vectors and aligning all interferers at a given receiver to the interferer with the largest DoF. As a byproduct, we obtain the DoF region for the original interference channel. We also discuss extensions of our approach where the same region can be achieved by considering a reduced set of interference alignment constraints, thus reducing the time-expansion duration needed. The DoF region for the considered system depends only on a subset of receivers whose demands meet certain characteristics. The geometric shape of the DoF region is also discussed.</p>
dc.description.comments <p>This is a manuscript of an article from <em>IEEE Transactions on Information Theory </em>58 (2012): 3787, <a href="http://dx.doi.org/10.1109/TIT.2012.2189197" target="_blank">doi: 10.1109/TIT.2012.2189197</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ece_pubs/112/
dc.identifier.articleid 1112
dc.identifier.contextkey 9652744
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ece_pubs/112
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/20934
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ece_pubs/112/2012_Ramamoorthy_DegreesFreedom.pdf|||Fri Jan 14 18:44:48 UTC 2022
dc.source.uri 10.1109/TIT.2012.2189197
dc.subject.disciplines Controls and Control Theory
dc.subject.disciplines Electrical and Computer Engineering
dc.subject.disciplines Signal Processing
dc.subject.keywords Interference alignment
dc.subject.keywords degrees of freedom region
dc.subject.keywords multicast
dc.subject.keywords multiple-input multiple-output
dc.subject.keywords interference network
dc.title Degrees of Freedom Region for an Interference Network with General Message Demands
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication b7a82e2a-7fd1-4c26-85f1-64be3e645430
relation.isAuthorOfPublication 8f4839bd-bc09-45dd-863a-1157465ec37a
relation.isOrgUnitOfPublication a75a044c-d11e-44cd-af4f-dab1d83339ff
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