liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
Downsampling Non-Uniformly Sampled Data
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
2007 (English)Report (Other academic)
Abstract [en]

Decimating a uniformly sampled signal a factor D involves low-pass antialias filtering with normalized cutoff frequency 1/D followed by picking out every Dth sample. Alternatively, decimation can be done in the frequency domain using the fast Fourier transform (FFT) algorithm, after zero-padding the signal and truncating the FFT. We outline three approaches to decimate non-uniformly sampled signals, which are all based on interpolation. The interpolation is done in different domains, and the inter-sample behavior does not need to be known. The first one interpolates the signal to a uniformly sampling, after which standard decimation can be applied. The second one interpolates a continuous-time convolution integral, that implements the antialias filter, after which every Dth sample can be picked out. The third frequency domain approach computes an approximate Fourier transform, after which truncation and IFFT give the desired result. Simulations indicate that the second approach is particularly useful. A thorough analysis is therefore performed for this case, using the assumption that the non-uniformly distributed sampling instants are generated by a stochastic process.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2007. , 18 p.
Series
LiTH-ISY-R, ISSN 1400-3902 ; 2773
Keyword [en]
Decimation, Stochastic sampling, Signal processing
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-55820ISRN: LiTH-ISY-R-2773OAI: oai:DiVA.org:liu-55820DiVA: diva2:316511
Available from: 2010-04-30 Created: 2010-04-30 Last updated: 2014-07-30Bibliographically approved

Open Access in DiVA

fulltext(1147 kB)607 downloads
File information
File name FULLTEXT01.pdfFile size 1147 kBChecksum SHA-512
e529bec460761a71a58ad3397cf2af2b07668d30791c901f6eb920b5ccaf62d1c7d63f29ddfb430fe3c2dd61c1f304db89ff476f89f03580d1a3847f2eee66d2
Type fulltextMimetype application/pdf

Authority records BETA

Eng, FridaGustafsson, Fredrik

Search in DiVA

By author/editor
Eng, FridaGustafsson, Fredrik
By organisation
Automatic ControlThe Institute of Technology
Control Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 607 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 136 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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