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Digital Compensation of Phase Noise Caused by Mechanical Vibrations
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The component that generates the frequency of the radio waves transmitted by a radar is generally built around a quartz crystal oscillator. When this component is exposed to mechanical vibrations, such as acceleration or rotation in different directions, phase noise occurs. That is due to the piezoelectric effect of quartz crystals, which eventually degrades the performance of a radar. High frequency noise are compensated for using mechanical dampers. However, the low frequency noise remains and requires a digital solution.

To solve this, a theoretical compensation model for the quartz crystal has been designed. It was possible to measure the noise generated by the quartz crystal by utilising an accelerometer, perform simulations and calculations. With the help of these different tools, it was possible to theoretically calculate and reduce the phase noise by 30-40%. All the results that has been obtained are theoretical results and nothing has yet been implemented in any radar system.

Place, publisher, year, edition, pages
2019. , p. 59
Series
UPTEC E, ISSN 1654-7616 ; 19 010
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:uu:diva-387826OAI: oai:DiVA.org:uu-387826DiVA, id: diva2:1330579
Educational program
Master Programme in Electrical Engineering
Supervisors
Examiners
Available from: 2019-06-26 Created: 2019-06-25 Last updated: 2019-06-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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