Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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
Real-time sampling of ground penetrating radar and related processing
2005 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Ground penetrating radar (GPR) is a technique for inspecting objects and surfaces hidden under obstructing materials. Common uses are inspections of the bedrock, ground water and other layers in the ground. It can also be used for short distance investigations where high precision is needed, such as in road quality examinations. As with all radar systems, relatively high frequency electromagnetic waves are used in ranges of 40 MHz up to several GHz. To get the resulting data in digital form, as almost always needed because of recording and postprocessing needs, analog to digital conversion must be performed. Sampling and converting such high frequency signals requires a very high sampling frequency, so high that common real-time sampling techniques have not been possible to use. Instead a technique, called time equivalent sampling, that reduces the needed sampling frequency dramatically has been used. The disadvantage of time equivalent sampling is the low speed. Recently, the ever progressing development of faster electronics has made converters with high sampling frequencies, adequate for GPR use, available. Real-time sampling of GPR opens for new signal processing possibilities, the main one being stacking of the signal. Stacking is a technique for lowering the noise of the received radar reflections, and could lead to a longer range for GPR systems. In this project, the main objective was to investigate the possibilities of performing real-time sampling, and related processing, with standard electronic hardware. In the end a prototype real-time sampling GPR system was developed. It can stack up to 3000 GPR-scans per second, and also perform filtering and other processing. As this was only a prototype, code efficiency was not a high priority and therefore a noticeable speed increase is probable after optimization.

Place, publisher, year, edition, pages
2005.
Keyword [en]
Technology, Signal processing, Ground penetrating radar, GPR, Geophysics, Real-time sampling
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-53274ISRN: LTU-EX--05/039--SELocal ID: a4e5a01d-23e7-443e-8515-003a446ffb64OAI: oai:DiVA.org:ltu-53274DiVA, id: diva2:1026648
Subject / course
Student thesis, at least 30 credits
Educational program
Computer Science and Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(1881 kB)104 downloads
File information
File name FULLTEXT01.pdfFile size 1881 kBChecksum SHA-512
9d24c6aac031d59a28985e2e623db1b3b55c1c52c8d8866842e40f4ac287d46bc9603c7fe80ace366305866f029c2c9caf97e24589333fd3c6a0ce75affc2598
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
Total: 104 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: 19 hits
CiteExportLink to record
Permanent link

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