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Maximum Likelihood Parameter Estimation in a GNSS Receiver

Antreich, Felix and Nossek, Josef A. (2007) Maximum Likelihood Parameter Estimation in a GNSS Receiver. In: ITG VDE WFMN2007. ITG VDE. ITG VDE WFMN2007, 2007-07-03 - 2007-07-05, Chemnitz.

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The potential of the SAGE (Space Alternating Generalized Expectation Maximization) 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 generalization of the EM (Expectation-Maximization) 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 a receiver using an antenna array. Whereas we estimate the complex amplitudes, relative delays, Doppler frequencies, and the spatial signature of the impinging waves (incident azimuth and elevation). 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 combat multipath due to its good performance, fast convergence, and low complexity.

Item URL in elib:https://elib.dlr.de/50925/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Maximum Likelihood Parameter Estimation in a GNSS Receiver
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Nossek, Josef A.Technische Universität München (TUM)UNSPECIFIED
Date:5 July 2007
Journal or Publication Title:ITG VDE WFMN2007
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Publisher:ITG VDE
Keywords:Maximum Likelihood, GNSS, GPS, Delay Estimation, Array Processing
Event Title:ITG VDE WFMN2007
Event Location:Chemnitz
Event Type:national Conference
Event Dates:2007-07-03 - 2007-07-05
Organizer:ITG VDE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Antreich, Felix
Deposited On:27 Aug 2007
Last Modified:12 Dec 2013 20:27

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