<div class="csl-bib-body">
<div class="csl-entry">Dörpinghaus, M., Koliander, G., Durisi, G., Riegler, E. H., & Meyr, H. (2014). Oversampling Increases the Pre-Log of Noncoherent Rayleigh Fading Channels. <i>IEEE Transactions on Information Theory</i>, <i>60</i>(9), 5673–5681. https://doi.org/10.1109/tit.2014.2339820</div>
</div>
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dc.identifier.issn
0018-9448
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/157638
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dc.description.abstract
We analyze the capacity of a continuous-time, time-selective, Rayleigh block-fading channel in the high signal-to-noise ratio (SNR) regime. The fading process is assumed stationary within each block and to change independently from block to block; furthermore, its realizations are not known a priori to the transmitter and the receiver (noncoherent setting). A common approach to analyzing the capacity of this channel is to assume that the receiver performs matched filtering followed by sampling at symbol rate (symbol matched filtering). This yields a discrete-time channel in which each transmitted symbol corresponds to one output sample. Liang & Veeravalli (2004) showed that the capacity of this discrete-time channel grows logarithmically with the SNR, with a capacity pre-log equal to 1-Q/N. Here, N is the number of symbols transmitted within one fading block, and Q is the rank of the covariance matrix of the discrete-time channel gains within each fading block. In this paper, we show that symbol matched filtering is not a capacity-achieving strategy for the underlying continuous-time channel. Specifically, we analyze the capacity pre-log of the discrete-time channel obtained by oversampling the continuous-time channel output, i.e., by sampling it faster than at symbol rate. We prove that by oversampling by a factor two one gets a capacity pre-log that is at least as large as 1-1/N. Since the capacity pre-log corresponding to symbol-rate sampling is 1-Q/N, our result implies indeed that symbol matched filtering is not capacity achieving at high SNR.
en
dc.language.iso
en
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dc.relation.ispartof
IEEE Transactions on Information Theory
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dc.subject
Computer Science Applications
en
dc.subject
Information Systems
en
dc.subject
oversampling
en
dc.subject
Library and Information Sciences
en
dc.subject
Fading channels
en
dc.subject
noncoherent capacity
en
dc.title
Oversampling Increases the Pre-Log of Noncoherent Rayleigh Fading Channels
en
dc.type
Artikel
de
dc.type
Article
en
dc.description.startpage
5673
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dc.description.endpage
5681
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dc.type.category
Original Research Article
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tuw.container.volume
60
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tuw.container.issue
9
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tuw.journal.peerreviewed
true
-
tuw.peerreviewed
true
-
wb.publication.intCoWork
International Co-publication
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tuw.researchTopic.id
I7
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tuw.researchTopic.name
Telecommunication
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tuw.researchTopic.value
100
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dcterms.isPartOf.title
IEEE Transactions on Information Theory
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tuw.publication.orgunit
E389-03 - Forschungsbereich Signal Processing
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tuw.publisher.doi
10.1109/tit.2014.2339820
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dc.date.onlinefirst
2014-07-17
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dc.identifier.eissn
1557-9654
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dc.description.numberOfPages
9
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wb.sci
true
-
wb.sciencebranch
Elektrotechnik, Elektronik, Informationstechnik
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wb.sciencebranch
Mathematik
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wb.sciencebranch.oefos
2020
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wb.sciencebranch.oefos
1010
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wb.facultyfocus
Telekommunikation
de
wb.facultyfocus
Telecommunications
en
wb.facultyfocus.faculty
E350
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item.openairetype
Artikel
-
item.openairetype
Article
-
item.cerifentitytype
Publications
-
item.cerifentitytype
Publications
-
item.languageiso639-1
en
-
item.grantfulltext
restricted
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.fulltext
no Fulltext
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crisitem.author.dept
E389 - Telecommunications
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crisitem.author.dept
E389 - Telecommunications
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crisitem.author.parentorg
E350 - Fakultät für Elektrotechnik und Informationstechnik
-
crisitem.author.parentorg
E350 - Fakultät für Elektrotechnik und Informationstechnik