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MPD-vågformer för helikopterradar
Linköping University, Department of Electrical Engineering.
2003 (Swedish)Independent thesis Basic level (professional degree)Student thesisAlternative title
MPD waveforms for helicopter radar (English)
Abstract [en]

A helicopter based system equipped with a millimetre-wave fire control radar is studied for improvement of the detection probability for moving ground targets. The system is a pulse doppler radar that sends out the electromagnetic wave in repetitive pulses. The frequency in which radar sends this pulse is called Pulse Repetition Frequency (PRF).

The velocity of the moving targets is measured by spectral analysis of the pulses received. With this sort of system some targets will not be possible to detect. These targets are said to be blind for the radar. Also the measured targets can be ambiguous. A solution to this is to shift PRF during the time the radar emits itspulses on the target. This method is called PRF block staggering. The antenna is mounted on a mechanical sweep on top of the rotor of the helicopter. Because of this the time on target is limited. This means that the measured velocity resolution of the radar is also limited.

With the studied method it is possible to resolve range and velocity ambiguities. This is under the condition that it is acceptable with a reduction in the velocity resolution by a factor equal to the number of PRF blocks used.

The work leading to this thesis included developing a program in Mathworks Matlab for studying different configurations of PRFs and the effect on the detection probability.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2003. , 70 p.
Series
LiTH-ISY-Ex, 3121
Keyword [en]
Reglerteknik, radar, pulse repetition frequency, PRF, helicopter, clutter, ambiguity
Keyword [sv]
Reglerteknik
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-1729OAI: oai:DiVA.org:liu-1729DiVA: diva2:19054
Uppsok
teknik
Available from: 2003-06-16 Created: 2003-06-16

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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