Skip to main content
padlock icon - secure page this page is secure

Impedance Reconstruction Methods for Pulse Reflectometry

Buy Article:

$30.00 + tax (Refund Policy)

A comparison is made between several algorithms used for the reconstruction of impedance layers from reflection measurements. The trade-off between accuracy and computation time is investigated for several theoretical and experimental cases. For continuous monotonic impedance changes, approximate methods producing reconstruction errors of less than 2% are some 20 times faster than the “complete” methods, when 100 sample points are used. The errors increase to 10% for discontinuous impedance changes. For highly non-monotonic impedance variations, the corresponding errors are approximately 25%. The results are applicable to geophysics, transmission line analysis, and time domain reflectometry.

Zusammenfassung

Verschiedene Algorithmen für die Rekonstruktion von Impedanzbelägen aus Reflexionsmessungen werden miteinander verglichen. Es wird für verschiedene theoretische und experimentelle Fälle der Kompromiß zwischen Genauigkeit und Rechenzeit untersucht. Für monotone Impedanzänderungen sind Näherungsmethoden, die mit einem Rekonstruktionsfehler von weniger als 2% behaftet sind, etwa 20 mal schneller als die “vollständigen” Methoden, wenn 100 Abtastpunkte benutzt werden. Für unstetige Impedanzänderungen steigen die Fehler auf 10% an, während sie fär stark nichtmonotone Impedanzänderungen etwa 25% betragen. Die Ergebnisse können auf die Geophysik, die Untersuchung von Übertragungsleitungen und auf die Zeitdomänen-Reflektometrie angewandt werden.

Sommaire

On compare plusieurs algorithmes utilisés pour reconstituer l'impédance de couches à partir de mesures de réflexion. On recherche un compromis entre précision et temps de calcul pour plusieurs cas théoriques et expérimentaux. Pour des variations continues monotones de l'impédance, les méthodes approchées produisant une erreur de reconstitution inférieure à 2% sont vingt fois plus rapides que les méthodes «complètes», lorsque l'on utilise un échantillonnage de cent points. Le taux d'erreur monte à 10% pour des variations discontinues de l'impédance. Pour les variations fortement non-monotones de l'impedance, les erreurs correspondantes sont d'environ 25%. Les resultats sont applicables à la géophysique, l'analyse des lignes de transmission et la reflectométrie dans le domaine temporel.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: April 1, 1992

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Information for Advertisers
  • Online User License
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more