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
Simulation of wireless communications in underground tunnels
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

The new released 4G standard wireless communication reminds us that higher transmission data rate and more reliable service are required urgently. However, to fulfill the demand can face problems in a complex environment like mines. In this thesis, characterization of underground tunnel mines with the idea of combating intersymbol interference effect is presented.

           Ray tracing simulation method is applied to characterize channel impulse response in different positions of an underground tunnel. From this channel impulse response, we can obtain how intersymbol interference affects different wireless systems. Intersymbol interference occurs due to multipath propagation of time dispersion channel.

          Adaptive Equalization is the most effective way to compensate intersymbol interference. Adaptive filter adapts filter coefficients to compensate the channel so that the combination of the filter and channel offers a flat frequency response and linear phase. The bit error rate performance without using adaptive equalization is compared with using equalizer. Moreover, adaptive equalization approaches using RLS and LMS algorithms are compared with each other. The tradeoff between convergence rate, computation cost instability and ensemble averaged minimum squared errors are analyzed to determine how to select the optimum adaptive equalizer.

Place, publisher, year, edition, pages
2012. , 38 p.
Keyword [en]
time dispersion channels, intersymbol interference, adaptive equalization
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:hig:diva-11409Archive number: TEX110226OAI: oai:DiVA.org:hig-11409DiVA: diva2:488432
Subject / course
Electronics
Educational program
Electronics/Telecommunications – master’s programme (two years) (swe or eng)
Presentation
2012-01-26, 11:320, Kungsbäcksvägen 47, 801 76, Gävle, Sweden, 14:00 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-02-09 Created: 2012-02-01 Last updated: 2017-04-11Bibliographically approved

Open Access in DiVA

fulltext(1575 kB)1643 downloads
File information
File name FULLTEXT03.pdfFile size 1575 kBChecksum SHA-512
18859497e73c2e7fd4ad83458eca7c4ec20343aef18a73265e2ce0e5e60d570673d3c8b248c66445c1e967a2ac71aa5ea9f8a3ccab0c4b1553db11054ef5da40
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
He, Shabai
By organisation
Department of Electronics, Mathematics and Natural Sciences
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar
Total: 1643 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: 304 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