GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/978-3-540-49350-1_27 http://hdl.handle.net/11449/70006 |
Resumo: | Integer carrier phase ambiguity resolution is the key to rapid and high-precision global navigation satellite system (GNSS) positioning and navigation. As important as the integer ambiguity estimation, it is the validation of the solution, because, even when one uses an optimal, or close to optimal, integer ambiguity estimator, unacceptable integer solution can still be obtained. This can happen, for example, when the data are degraded by multipath effects, which affect the real-valued float ambiguity solution, conducting to an incorrect integer (fixed) ambiguity solution. Thus, it is important to use a statistic test that has a correct theoretical and probabilistic base, which has became possible by using the Ratio Test Integer Aperture (RTIA) estimator. The properties and underlying concept of this statistic test are shortly described. An experiment was performed using data with and without multipath. Reflector objects were placed surrounding the receiver antenna aiming to cause multipath. A method based on multiresolution analysis by wavelet transform is used to reduce the multipath of the GPS double difference (DDs) observations. So, the objective of this paper is to compare the ambiguity resolution and validation using data from these two situations: data with multipath and with multipath reduced by wavelets. Additionally, the accuracy of the estimated coordinates is also assessed by comparing with the ground truth coordinates, which were estimated using data without multipath effects. The success and fail probabilities of the RTIA were, in general, coherent and showed the efficiency and the reliability of this statistic test. After multipath mitigation, ambiguity resolution becomes more reliable and the coordinates more precise. © Springer-Verlag Berlin Heidelberg 2007. |
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GPS ambiguity resolution and validation under multipath effects: Improvements using waveletsAmbiguityMultipathRatio Test Integer Aperture (RTIA)WaveletsAmbiguity resolutionGlobal Navigation Satellite SystemsInteger carrier phase ambiguity resolutionMulti-path mitigationRatio testEstimationGeodesyGeodetic satellitesInteger programmingOptimizationSatellite communication systemsToolsGlobal positioning systemInteger carrier phase ambiguity resolution is the key to rapid and high-precision global navigation satellite system (GNSS) positioning and navigation. As important as the integer ambiguity estimation, it is the validation of the solution, because, even when one uses an optimal, or close to optimal, integer ambiguity estimator, unacceptable integer solution can still be obtained. This can happen, for example, when the data are degraded by multipath effects, which affect the real-valued float ambiguity solution, conducting to an incorrect integer (fixed) ambiguity solution. Thus, it is important to use a statistic test that has a correct theoretical and probabilistic base, which has became possible by using the Ratio Test Integer Aperture (RTIA) estimator. The properties and underlying concept of this statistic test are shortly described. An experiment was performed using data with and without multipath. Reflector objects were placed surrounding the receiver antenna aiming to cause multipath. A method based on multiresolution analysis by wavelet transform is used to reduce the multipath of the GPS double difference (DDs) observations. So, the objective of this paper is to compare the ambiguity resolution and validation using data from these two situations: data with multipath and with multipath reduced by wavelets. Additionally, the accuracy of the estimated coordinates is also assessed by comparing with the ground truth coordinates, which were estimated using data without multipath effects. The success and fail probabilities of the RTIA were, in general, coherent and showed the efficiency and the reliability of this statistic test. After multipath mitigation, ambiguity resolution becomes more reliable and the coordinates more precise. © Springer-Verlag Berlin Heidelberg 2007.Department of Cartography São Paulo State University - UNESP, Roberto Simonsen, 350, Pres. Prudente, SPDepartment of Cartography São Paulo State University - UNESP, Roberto Simonsen, 350, Pres. Prudente, SPUniversidade Estadual Paulista (Unesp)Souza, E. M. [UNESP]Monico, J. F G [UNESP]2014-05-27T11:22:39Z2014-05-27T11:22:39Z2007-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject172-178http://dx.doi.org/10.1007/978-3-540-49350-1_27International Association of Geodesy Symposia, v. 130, p. 172-178.0939-9585http://hdl.handle.net/11449/7000610.1007/978-3-540-49350-1_27WOS:0002454194000272-s2.0-848843629077180879644760038Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Association of Geodesy Symposia0,403info:eu-repo/semantics/openAccess2021-10-23T21:41:38Zoai:repositorio.unesp.br:11449/70006Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T21:41:38Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
title |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
spellingShingle |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets Souza, E. M. [UNESP] Ambiguity Multipath Ratio Test Integer Aperture (RTIA) Wavelets Ambiguity resolution Global Navigation Satellite Systems Integer carrier phase ambiguity resolution Multi-path mitigation Ratio test Estimation Geodesy Geodetic satellites Integer programming Optimization Satellite communication systems Tools Global positioning system |
title_short |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
title_full |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
title_fullStr |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
title_full_unstemmed |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
title_sort |
GPS ambiguity resolution and validation under multipath effects: Improvements using wavelets |
author |
Souza, E. M. [UNESP] |
author_facet |
Souza, E. M. [UNESP] Monico, J. F G [UNESP] |
author_role |
author |
author2 |
Monico, J. F G [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Souza, E. M. [UNESP] Monico, J. F G [UNESP] |
dc.subject.por.fl_str_mv |
Ambiguity Multipath Ratio Test Integer Aperture (RTIA) Wavelets Ambiguity resolution Global Navigation Satellite Systems Integer carrier phase ambiguity resolution Multi-path mitigation Ratio test Estimation Geodesy Geodetic satellites Integer programming Optimization Satellite communication systems Tools Global positioning system |
topic |
Ambiguity Multipath Ratio Test Integer Aperture (RTIA) Wavelets Ambiguity resolution Global Navigation Satellite Systems Integer carrier phase ambiguity resolution Multi-path mitigation Ratio test Estimation Geodesy Geodetic satellites Integer programming Optimization Satellite communication systems Tools Global positioning system |
description |
Integer carrier phase ambiguity resolution is the key to rapid and high-precision global navigation satellite system (GNSS) positioning and navigation. As important as the integer ambiguity estimation, it is the validation of the solution, because, even when one uses an optimal, or close to optimal, integer ambiguity estimator, unacceptable integer solution can still be obtained. This can happen, for example, when the data are degraded by multipath effects, which affect the real-valued float ambiguity solution, conducting to an incorrect integer (fixed) ambiguity solution. Thus, it is important to use a statistic test that has a correct theoretical and probabilistic base, which has became possible by using the Ratio Test Integer Aperture (RTIA) estimator. The properties and underlying concept of this statistic test are shortly described. An experiment was performed using data with and without multipath. Reflector objects were placed surrounding the receiver antenna aiming to cause multipath. A method based on multiresolution analysis by wavelet transform is used to reduce the multipath of the GPS double difference (DDs) observations. So, the objective of this paper is to compare the ambiguity resolution and validation using data from these two situations: data with multipath and with multipath reduced by wavelets. Additionally, the accuracy of the estimated coordinates is also assessed by comparing with the ground truth coordinates, which were estimated using data without multipath effects. The success and fail probabilities of the RTIA were, in general, coherent and showed the efficiency and the reliability of this statistic test. After multipath mitigation, ambiguity resolution becomes more reliable and the coordinates more precise. © Springer-Verlag Berlin Heidelberg 2007. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12-01 2014-05-27T11:22:39Z 2014-05-27T11:22:39Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/978-3-540-49350-1_27 International Association of Geodesy Symposia, v. 130, p. 172-178. 0939-9585 http://hdl.handle.net/11449/70006 10.1007/978-3-540-49350-1_27 WOS:000245419400027 2-s2.0-84884362907 7180879644760038 |
url |
http://dx.doi.org/10.1007/978-3-540-49350-1_27 http://hdl.handle.net/11449/70006 |
identifier_str_mv |
International Association of Geodesy Symposia, v. 130, p. 172-178. 0939-9585 10.1007/978-3-540-49350-1_27 WOS:000245419400027 2-s2.0-84884362907 7180879644760038 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Association of Geodesy Symposia 0,403 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
172-178 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964566158835712 |