Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Unified Capacity Limit of Non-Coherent Wideband Fading Channels
University of Vigo, Spain.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre. Research Lab of Electronics, MIT.ORCID iD: 0000-0002-9709-0713
MIT.
NYU Polytechnic School of Engineering, USA.
2015 (English)In: IEEE Transactions on Information Theory, ISSN 0018-9448, E-ISSN 1557-9654Article in journal (Refereed) Submitted
Abstract [en]

Peaky and non-peaky signaling schemes have long been considered species apart in non-coherent wideband fading channels, as the first approaches asymptotically the linear-in-power capacity of a wideband AWGN channel with the same SNR, whereas the second reaches a nearly power-limited peak rate at some finite critical bandwidth and then falls to zero as bandwidth grows to infinity. In this paper it is shown that this distinction is in fact an artifact of the limited attention paid in the past to the product between the bandwidth and the fraction of time it is in use. This fundamental quantity, that is termed bandwidth occupancy, measures average bandwidth usage over time. As it turns out, a peaky signal that transmits in an infinite bandwidth but only for an infinitesimal fraction of the time may only have a small bandwidth occupancy, and so does a non-peaky scheme that limits itself to the critical bandwidth even though more spectrum is available, so as to not degrade rate. The two types of signaling in the literature are harmonized to show that, for any type of signals, there is a fundamental limit---a critical bandwidth occupancy. All signaling schemes with the same bandwidth occupancy approach the linear-in-power capacity of wideband AWGN channels with the same asymptotic behavior as the bandwidth occupancy approaches its critical value. For a bandwidth occupancy above the critical value, rate decreases to zero as the occupancy goes to infinity. This unified analysis not only recovers previous results on capacity bounds for (non-)peaky signaling schemes, but also reveals the fundamental tradeoff between accuracy and convergence when characterizing the maximal achievable rate.

Place, publisher, year, edition, pages
2015.
Keyword [en]
Wideband regime, peaky signals, non-peaky signals, bandwidth occupancy
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-159102OAI: oai:DiVA.org:kth-159102DiVA: diva2:782546
Funder
Swedish Research Council
Note

QS 20150407.

Submitted to IEEE Transactions on Information Theory, Jan. 2015. 

The first two authors contributed equally to this work.

Available from: 2015-01-21 Created: 2015-01-21 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

No full text

Other links

arXiv:1501.04905

Authority records BETA

Du, Jinfeng

Search in DiVA

By author/editor
Du, Jinfeng
By organisation
Communication TheoryACCESS Linnaeus Centre
In the same journal
IEEE Transactions on Information Theory
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 95 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf