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Parameter Estimation Using SAGE in a GNSS-Receiver

Antreich, F. and Esbri-Rodriguez, O. and Nossek, J.A. and Utschick, W. (2004) Parameter Estimation Using SAGE in a GNSS-Receiver. In: Proceedings NAVITEC '2004. 2nd ESA Workshop on Satellite Navigation User Equipment Technologies NAVITEC´2004, 8-10 December 2004, Noordwijk, The Netherlands, Noordwijk, Holland.

Full text not available from this repository.

Official URL: ftp://ftp.estec.esa.nl/pub/tos-ett/navitec2004/

Abstract

The potential of the SAGE (Space-Alternating Generalised Expectation Maximisation) algorithm for navigation systems in order to distinguish the line-of-sight signal (LOSS) is to be considered. The SAGE algorithm is a low-complexity generalisation of the EM (Expectation-Maximisation) algorithm, which iteratively approximates the maximum likelihood estimator (MLE) and has been successfully applied for parameter estimation (relative delay, incident azimuth, incident elevation, Doppler frequency, and complex amplitude of impinging waves) in mobile radio environments. This study discusses receivers using a single antenna, and also points out the capabilities of this technique using multiple antennas (array processing), for the application in a GNSS (Global Navigation Satellite Systems) environment. Whereas for the single antenna case we estimate the complex amplitudes and relative delays of the impinging waves, in the latter additionally the spatial signature of the impinging waves (incident azimuth) is estimated. The results of the performed computer simulations and discussion indicate that the SAGE algorithm has the potential to be a very powerful high-resolution method to successfully estimate parameters of impinging waves for navigation systems. SAGE has proven to be a promising method to efficiently combat multipath for navigation applications due to its good performance, fast convergence, and low complexity.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004, monograph_id=14.2,
Title:Parameter Estimation Using SAGE in a GNSS-Receiver
Authors:
AuthorsInstitution or Email of Authors
Antreich, F.UNSPECIFIED
Esbri-Rodriguez, O.ESTEC, Noordwijk, The Netherlands
Nossek, J.A.TU München, Germany
Utschick, W.TU München, Germany
Date:2004
Journal or Publication Title:Proceedings NAVITEC '2004
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
ESA, UNSPECIFIED
Status:Published
Keywords:GNSS, Receiver, SAGE, Parameter Estimation
Event Title:2nd ESA Workshop on Satellite Navigation User Equipment Technologies NAVITEC´2004, 8-10 December 2004, Noordwijk, The Netherlands
Event Location:Noordwijk, Holland
Event Type:international Conference
Organizer:European Space Agency (ESA)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 21:34

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