DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Namyoon | ko |
dc.contributor.author | Chun, Joohwan | ko |
dc.date.accessioned | 2014-09-04T08:42:17Z | - |
dc.date.available | 2014-09-04T08:42:17Z | - |
dc.date.created | 2014-04-01 | - |
dc.date.created | 2014-04-01 | - |
dc.date.issued | 2014-03 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON INFORMATION THEORY, v.60, no.3, pp.1814 - 1821 | - |
dc.identifier.issn | 0018-9448 | - |
dc.identifier.uri | http://hdl.handle.net/10203/190158 | - |
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-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.subject | CAPACITY | - |
dc.subject | ALIGNMENT | - |
dc.title | Degrees of Freedom for a MIMO Gaussian K-Way Relay Channel: Successive Network Code Encoding and Decoding | - |
dc.type | Article | - |
dc.identifier.wosid | 000331902400033 | - |
dc.identifier.scopusid | 2-s2.0-84896845404 | - |
dc.type.rims | ART | - |
dc.citation.volume | 60 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 1814 | - |
dc.citation.endingpage | 1821 | - |
dc.citation.publicationname | IEEE TRANSACTIONS ON INFORMATION THEORY | - |
dc.identifier.doi | 10.1109/TIT.2014.2298138 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Chun, Joohwan | - |
dc.contributor.nonIdAuthor | Lee, Namyoon | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Degrees of freedom | - |
dc.subject.keywordAuthor | multi-way relay channels | - |
dc.subject.keywordAuthor | network coding | - |
dc.subject.keywordPlus | CAPACITY | - |
dc.subject.keywordPlus | ALIGNMENT | - |
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