Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
An electronic warfare perspective on time difference of arrival estimation subject to radio receiver imperfections
KTH, Superseded Departments, Signals, Sensors and Systems.
2004 (English)Licentiate thesis, monograph (Other scientific)
Abstract [en]

In order to ensure secure communication in digital military radio systems, multiple methods are used to protect the transmission from being intercepted by enemy electronic warfare systems. An intercepted transmission can be used to estimate several parameters of the transmitted signal such as its origin (position or direction) and of course the transmitted message itself. The methods used in traditional electronic warfare direction-finding systems have in general poor performance against wideband low power signals while the considered correlation-based time-difference of arrival (TDOA) methods show promising results.

The output from a TDOA-based direction-finding system using two spatially separated receivers is the TDOA for the signal between the receiving sensors which uniquely describes a hyperbolic curve and the emitter is located somewhere along this curve. In order to measure a TDOA between two digital radio receivers both receiver systems must have the same time and frequency references to avoid degradation due to reference imperfections. However, in some cases, the receivers are separated up to 1000 km and can not share a common reference. This is solved by using a reference module at each of the receiver sites and high accuracy is achieved using the NAVSTAR-GPS system but, still, small differences between the outputs of the different reference modules occurs which degrades the performance of the system.

In a practical electronic warfare system there is a number of factors that degrade the performance of the system, such as non-ideal antennas, analog receiver filter differences, and the analog to digital converter errors. In this thesis we concentrate on the problems which arises from imperfections in the reference modules, such as time and frequency errors.

Place, publisher, year, edition, pages
2004. , VI, 85 p.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-393OAI: oai:DiVA.org:kth-393DiVA: diva2:10063
Presentation
2004-12-17, Hörsal Q2, Osquldas väg 10, Stockholm, 10:00
Available from: 2005-08-12 Created: 2005-08-12 Last updated: 2016-11-24

Open Access in DiVA

fulltext(992 kB)3332 downloads
File information
File name FULLTEXT01.pdfFile size 992 kBChecksum MD5
6ddbc085e7d3dba42540f13a60fd8d19ebfcef06d5d4ee04617283467788b150fd39dd78
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Falk, Johan
By organisation
Signals, Sensors and Systems
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 3337 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: 741 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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