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dc.contributor.authorNeu, Joachim
dc.contributor.authorChaaban, Anas
dc.contributor.authorSezgin, Aydin
dc.contributor.authorAlouini, Mohamed-Slim
dc.identifier.citationNeu, J., Chaaban, A., Sezgin, A., & Alouini, M.-S. (2019). Degrees-of-Freedom of the MIMO Three-Way Channel With Node-Intermittency. IEEE Transactions on Information Theory, 65(10), 6781–6800. doi:10.1109/tit.2019.2919548
dc.description.abstractThe characterization of fundamental performance bounds of many-to-many communication systems in which participating nodes are active in an intermittent way is one of the major challenges in communication theory. In order to address this issue, we introduce the multiple-input multiple-output (MIMO) three-way channel (3WC) with an intermittent node and study its degrees-of-freedom (DoF) region and sum-DoF. We devise a non-adaptive encoding scheme based on zero-forcing, interference alignment and erasure coding, and show its DoF region (and thus sum-DoF) optimality for non-intermittent 3WCs and its sum-DoF optimality for (node-)intermittent 3WCs. However, we show by example that in general some DoF tuples in the intermittent 3WC can only be achieved by adaptive schemes, such as decode-forward relaying. This shows that non-adaptive encoding is sufficient for the non-intermittent 3WC and for the sum-DoF of intermittent 3WCs, but adaptive encoding is necessary for the DoF region of intermittent 3WCs. Our work contributes to a better understanding of the fundamental limits of multi-way communication systems with intermittency and the impact of adaptation therein.
dc.description.sponsorshipThis work was supported in part by the German Research Foundation (DFG), under grant SE 1697/16. This work has been presented in part at the 2017 IEEE International Symposium on Information Theory.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.rights(c) 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectthree-way channel
dc.subjectintermittent connectivity
dc.subjectinterference alignment
dc.subjectzero forcing
dc.subjectrelay networks
dc.subjectinterference channel
dc.titleDegrees-of-Freedom of the MIMO Three-Way Channel with Node-Intermittency
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Transactions on Information Theory
dc.contributor.institutionTechnische Universitäat München (TUM), 80333 München, Germany
dc.contributor.institutionStanford University, Stanford, CA 94305, USA.
dc.contributor.institutionSchool of Engineering, University of British Columbia (UBC), Kelowna, BC Canada V1Y 1V7.
dc.contributor.institutionInstitute of Digital Communication Systems, Ruhr-Universität Bochum (RUB), 44780 Bochum, Germany.
kaust.personNeu, Joachim
kaust.personAlouini, Mohamed-Slim

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