Change search
ReferencesLink to record
Permanent link

Direct link
FDM and FEM filters in terrain navigation
KTH, School of Electrical Engineering (EES), Signal Processing.
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-6855-5868
2007 (English)In: Proceedings of the Institute of Navigation, National Technical Meeting, 2007, Vol. 2, 1155-1166 p.Conference paper (Refereed)
Abstract [en]

Terrain navigation in nearly flat areas is a difficult task since the probability density function (PDF) of the vehicle position typically is multimodal due to terrain repeatability. Traditional methods as TERCOM, TERPROM or similar methods fail in such situations. Instead, Bayesian methods have proven to be useful. A prerequisite for all terrain navigation methods in nearly flat areas is extremely informative measurements of the terrain topography. In addition, methods for efficiently propagating the multimodal probability density function of the vehicle are needed. This paper describes a Bayesian filtering method based on finite differences or finite elements that can efficiently handle the propagation of multimodal PDFs. The paper also goes briefly into the theory behind the filters starting with a problem formulation by stochastic differential equations. The proposed filtering method has been successfully tested with real measurement data and maps and it is fast enough to allow the filter to be used in real time even for fast vehicles. Besides being optimal, the method is highly robust, conditions for stability are well understood, and error estimates are available. Another advantage of the method is that readily available professional software for solving partial differential equations can be adopted.

Place, publisher, year, edition, pages
2007. Vol. 2, 1155-1166 p.
Keyword [en]
Bayesian networks, Finite difference method, Partial differential equations, Probability density function, Signal filtering and prediction, Topography, Error estimates, Stochastic differential equations, Terrain navigation, Navigation systems
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-35661ScopusID: 2-s2.0-34547987693OAI: diva2:429417
Institute of Navigation National Technical Meeting, NTM 2007; San Diego
QC 20110704Available from: 2011-07-04 Created: 2011-07-04 Last updated: 2012-02-12Bibliographically approved

Open Access in DiVA

No full text

Other links


Search in DiVA

By author/editor
Nygren, IngemarJansson, Magnus
By organisation
Signal Processing
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
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

Total: 438 hits
ReferencesLink to record
Permanent link

Direct link