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Reducing Effects of Multipath Propagation With a Blind Equalizer
Linköping University, Department of Electrical Engineering, Communication Systems.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

When transmitting data from an aircraft being prepared at the apron (the area in front of the hangar) telemetry data is transmitted to ground personnel. The transmitted data is subject to severe distortion due to multipath propagation created by the surroundings, resulting in erroneous detection. By equalizing the signal using the Constant Modulus Algorithm a significant increase in detection performance has been observed, both in simulations and tests on collected data. The most sufficient parameters were chosen after testing a set of different parameter combinations on simulations with single delays. These parameters were then used to equalize simulated multipath as well as collected data. The results show that short delays with low power can be resolved without any equalizer. Longer delays with relatively low power can be resolved using the proposed equalizer but long delays with high power cannot be resolved by the equalizer at all. The thesis shows that it is worth investigating implementation of the equalizer.

Place, publisher, year, edition, pages
2018. , p. 81
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:liu:diva-151598ISRN: LiTH-ISY-EX--18/5171--SEOAI: oai:DiVA.org:liu-151598DiVA, id: diva2:1252119
External cooperation
SAAB Aeronautics
Subject / course
Communication Systems
Available from: 2018-10-08 Created: 2018-09-30 Last updated: 2018-10-08Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • 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