DC Field | Value | Language |
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dc.contributor.author | Lee, N | - |
dc.contributor.author | Chun, J | - |
dc.date.accessioned | 2017-07-19T13:52:25Z | - |
dc.date.available | 2017-07-19T13:52:25Z | - |
dc.date.created | 2016-12-13 | - |
dc.date.issued | 2014-03 | - |
dc.identifier.issn | 0018-9448 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/37776 | - |
dc.description.abstract | This paper studies a network information flow problem for a multiple-input multiple-output (MIMO) Gaussian wireless network with K users and a single intermediate relay having M antennas. In this network, each user sends a multicast message to all other users while receiving K - 1 independent messages from the other users via an intermediate relay. This network information flow is termed a MIMO Gaussian K-way relay channel. For this channel, it is shown that the optimal sum degrees of freedom (sum-DoF) is KM/K - 1, assuming that all nodes have global channel knowledge and operate in full-duplex. A converse argument is derived by cut-set bounds. The achievability is shown by a repetition coding scheme with random beamforming in encoding and a zero-forcing method combined with self-interference cancelation in decoding. Furthermore, under the premise that all nodes have local channel state information at the receiver only and operate in half-duplex mode, it is shown that a total K/2 DoF is achievable when M=K-1. The key to showing this result is a novel encoding and decoding scheme, which creates a set of network code messages with a chain structure during the multiple access phase and performs successive interference cancelation using side-information for the broadcast phase. One major implication of the derived results is that efficient exploitation of the transmit message as sideinformation leads to an increase in the sum-DoF gain in a multiway relay channel with multicast messages. | - |
dc.language | English | - |
dc.publisher | IEEE | - |
dc.relation.isPartOf | IEEE Transactions on Information Theory | - |
dc.title | Degrees of Freedom for the MIMO Gaussian K-way Relay Channel: Successive Network Code Encoding and Decoding | - |
dc.type | Article | - |
dc.identifier.doi | 10.1109/TIT.2014.2298138 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | IEEE Transactions on Information Theory, v.60, no.3, pp.1814 - 1821 | - |
dc.identifier.wosid | 000331902400033 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 1821 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 1814 | - |
dc.citation.title | IEEE Transactions on Information Theory | - |
dc.citation.volume | 60 | - |
dc.contributor.affiliatedAuthor | Lee, N | - |
dc.identifier.scopusid | 2-s2.0-84896845404 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 9 | - |
dc.description.scptc | 10 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | Degrees of freedom | - |
dc.subject.keywordAuthor | multi-way relay channels | - |
dc.subject.keywordAuthor | network coding | - |
dc.relation.journalWebOfScienceCategory | Computer Science, Information Systems | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Computer Science | - |
dc.relation.journalResearchArea | Engineering | - |
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