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Digital utsläckning av sinussignal
Linköping University, Department of Electrical Engineering.
Linköping University, Department of Electrical Engineering.
2007 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Digital cancellation of sinusoidal signal (English)
Abstract [sv]

Detta examensarbete utröner möjligheten att aktivt släcka ut en amplitudstark frekvensmodulerad sinussignal digitalt. Detta skall göras utan förkunskap om signalen gällande fas, frekvens eller amplitud. Eventuellt övriga, men betydligt svagare, sinussignaler i den analoga signalen skall inte påverkas nämnvärt av utsläckningen. För att lösa problemet har olika teorier för att lösa delproblemen med att mäta amplitud, fas och frekvens studerats varefter en lämplig kombination valts för implementering i en FPGA. Prestandan som uppmätts har jämförts med vad som teoretiskt är möjligt och vi konstaterar att metoden löser problemet på ett adekvat sätt men är i behov av en del förbättringar som diskuteras i slutet.

Abstract [en]

This master thesis investigates the possibility to cancel a frequency modulated sinusoid with high amplitude in the digital domain. This will be done without any pre-knowledge of the signal regarding phase, frequency or amplitude. Other arbitrary, but weaker, sinusoids present in the analog signal should not be noticeable affected by the cancellation. To solve the partial problems of measuring amplitude, frequency and phase, different theories have been studied and thereafter a suitable combination was chosen for implementation in a Field Programmable Gate Array, FPGA. The performance measured has been compared to the theoretical maximum performance and it has been concluded that the proposed implementation solves this problem adequately but needs some enhancements, these are discussed in the final chapter.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2007. , 65 p.
Keyword [en]
Digital cancellation estimation frequency phase amplitude fast
Keyword [sv]
Digital utsläckning frekvensestimering fasestimering amplitudestimering snabb
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:liu:diva-11018ISRN: LITH-ISY-EX--07/3997--SEOAI: oai:DiVA.org:liu-11018DiVA: diva2:17472
Presentation
2007-12-19, Glashuset, B, Linköpings universitet, Linköping, 10:15 (English)
Uppsok
teknik
Supervisors
Examiners
Available from: 2008-02-08 Created: 2008-02-08Bibliographically approved

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Department of Electrical Engineering
Signal Processing

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CiteExportLink to record
Permanent link

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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