Cyclic Communication and the Inseparability of MIMO Multi-way Relay Channels

Handle URI:
http://hdl.handle.net/10754/581779
Title:
Cyclic Communication and the Inseparability of MIMO Multi-way Relay Channels
Authors:
Chaaban, Anas ( 0000-0002-8713-5084 ) ; Sezgin, Aydin
Abstract:
The K-user MIMO multi-way relay channel (Ychannel) consisting of K users with M antennas each and a common relay node with N antennas is studied in this paper. Each user wants to exchange messages with all the other users via the relay. A transmission strategy is proposed for this channel. The proposed strategy is based on two steps: channel diagonalization and cyclic communication. The channel diagonalization is applied by using zero-forcing beam-forming. After channel diagonalization, the channel is decomposed into parallel sub-channels. Cyclic communication is then applied, where signal-space alignment for network-coding is used over each sub-channel. The proposed strategy achieves the optimal DoF region of the channel if N M. To prove this, a new degrees-of-freedom outer bound is derived. As a by-product, we conclude that the MIMO Y-channel is not separable, i.e., independent coding on separate sub-channels is not enough, and one has to code jointly over several sub-channels.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Cyclic Communication and the Inseparability of MIMO Multi-way Relay Channels 2015:1 IEEE Transactions on Information Theory
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Information Theory
Issue Date:
27-Oct-2015
DOI:
10.1109/TIT.2015.2495220
Type:
Article
ISSN:
0018-9448; 1557-9654
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7308052
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChaaban, Anasen
dc.contributor.authorSezgin, Aydinen
dc.date.accessioned2015-11-05T06:09:55Zen
dc.date.available2015-11-05T06:09:55Zen
dc.date.issued2015-10-27en
dc.identifier.citationCyclic Communication and the Inseparability of MIMO Multi-way Relay Channels 2015:1 IEEE Transactions on Information Theoryen
dc.identifier.issn0018-9448en
dc.identifier.issn1557-9654en
dc.identifier.doi10.1109/TIT.2015.2495220en
dc.identifier.urihttp://hdl.handle.net/10754/581779en
dc.description.abstractThe K-user MIMO multi-way relay channel (Ychannel) consisting of K users with M antennas each and a common relay node with N antennas is studied in this paper. Each user wants to exchange messages with all the other users via the relay. A transmission strategy is proposed for this channel. The proposed strategy is based on two steps: channel diagonalization and cyclic communication. The channel diagonalization is applied by using zero-forcing beam-forming. After channel diagonalization, the channel is decomposed into parallel sub-channels. Cyclic communication is then applied, where signal-space alignment for network-coding is used over each sub-channel. The proposed strategy achieves the optimal DoF region of the channel if N M. To prove this, a new degrees-of-freedom outer bound is derived. As a by-product, we conclude that the MIMO Y-channel is not separable, i.e., independent coding on separate sub-channels is not enough, and one has to code jointly over several sub-channels.en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7308052en
dc.rights(c) 2015 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.en
dc.titleCyclic Communication and the Inseparability of MIMO Multi-way Relay Channelsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalIEEE Transactions on Information Theoryen
dc.eprint.versionPost-printen
dc.contributor.institutionInstitute of Digital Communication Systems, Ruhr Universitat Bochum (RUB), Germanyen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorChaaban, Anasen
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