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Generalized Integer Aperture Estimation for Partial GNSS Ambiguity Fixing

Brack, Andreas and Günther, Christoph (2014) Generalized Integer Aperture Estimation for Partial GNSS Ambiguity Fixing. Journal of Geodesy, 88 (5), pp. 479-490. Springer. DOI: 10.1007/s00190-014-0699-7 ISSN 0949-7714

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Official URL: http://link.springer.com/article/10.1007/s00190-014-0699-7/fulltext.html


In satellite navigation, the key to high precision is to make use of the carrier-phase measurements. The periodicity of the carrier-phase, however, leads to integer ambiguities. Often, resolving the full set of ambiguities cannot be accomplished for a given reliability constraint. In that case, it can be useful to resolve a subset of ambiguities. The selection of the subset should be based not only on the stochastic system model but also on the actual measurements from the tracking loops. This paper presents a solution to the problem of joint subset selection and ambiguity resolution. The proposed method can be interpreted as a generalized version of the class of integer aperture estimators. Two specific realizations of this new class of estimators are presented, based on different acceptance tests. Their computation requires only a single tree search, and can be efficiently implemented, e.g., in the framework of the well-known LAMBDA method. Numerical simulations with double difference measurements based on Galileo E1 signals are used to evaluate the performance of the introduced estimation schemes under a given reliability constraint. The results show a clear gain of partial fixing in terms of the probability of correct ambiguity resolution, leading to improved baseline estimates.

Item URL in elib:https://elib.dlr.de/93064/
Document Type:Article
Title:Generalized Integer Aperture Estimation for Partial GNSS Ambiguity Fixing
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brack, Andreasandreas.brack (at) tum.deUNSPECIFIED
Günther, Christophchristoph.guenther (at) dlr.deUNSPECIFIED
Date:1 May 2014
Journal or Publication Title:Journal of Geodesy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s00190-014-0699-7
Page Range:pp. 479-490
Keywords:Integer ambiguity resolution, Partial fixing, Fixed failure rate, Low complexity implementation, GNSS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Verläßliche Navigation (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Deposited By: Günther, Prof.Dr. Christoph
Deposited On:05 Dec 2014 09:31
Last Modified:10 Jan 2019 15:48

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