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Counting equivalent correlators: quantifying the number for GNSS acquisition engine architectures / A. Genghi in GPS world, vol 20 n° 1 (January 2009)
[article]
Titre : Counting equivalent correlators: quantifying the number for GNSS acquisition engine architectures Type de document : Article/Communication Auteurs : A. Genghi, Auteur ; J. Brenner, Auteur ; F. Spalla, Auteur Année de publication : 2009 Article en page(s) : pp 39 - 65 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] acquisition de données
[Termes IGN] covariance
[Termes IGN] positionnement par géodésie spatiale
[Termes IGN] puce
[Termes IGN] qualité instrumentale
[Termes IGN] récepteur Galileo
[Termes IGN] récepteur GNSS
[Termes IGN] récepteur GPSRésumé : (Auteur) Many GNSS chip manufacturers software houses, when announcing a new product, include a part of the specifications the numbers of equivalents correlators that boost the power of their acquisition engine. This number is one of the most important figures of merit for a GNSS receiver, especially when compared to the number of physical correlators. Nevertheless, it is not easily defined. Furthermore, this number is often dictated by engineering needs rather than by engineering measurements. It is quite obvious that this number is proportional to the sensitivity of the receiver and inversely proportional to the time to first fix (TTFF), but a precise relationship is difficult to find. In fact, the number of equivalent correlators depends not only on the baseband processing architecture but also on the firmware/software acquisition scheme. Also, this parameter has an intrinsic logarithmic relationship with the sensivity parameter, also it is not obvious to everyone in the GNSS community. In this article, we examine these issues and propose a means to quantify the number of equivalent correlators for traditional GPS receiver architectures. We extend the methodology to the latest architectures for high-sensitivity GPS receivers and for Galileo signal tracking. Copyright Questex Media Group Inc Numéro de notice : A2009-002 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29632
in GPS world > vol 20 n° 1 (January 2009) . - pp 39 - 65[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-09011 SL Revue Centre de documentation Revues en salle Disponible GNSS / Scott Gleason (2009)
Titre : GNSS : applications and methods Type de document : Monographie Auteurs : Scott Gleason, Éditeur scientifique ; Demoz Gebre-Egziabher, Éditeur scientifique Editeur : Londres, Washington : Artech House Année de publication : 2009 Collection : GNSS Technology and applications series Importance : 508 p. Format : 18 x 26 cm - cont. 1 DVD ISBN/ISSN/EAN : 978-1-59693-329-3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] BeiDou
[Termes IGN] centrale inertielle
[Termes IGN] détection du signal
[Termes IGN] Galileo
[Termes IGN] géodésie spatiale
[Termes IGN] Global Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] GNSS assisté pour la navigation
[Termes IGN] GNSS en mode différentiel
[Termes IGN] GPS-INS
[Termes IGN] interférence
[Termes IGN] logiciel de post-traitement GPS
[Termes IGN] LORAN (système)
[Termes IGN] navigation aérienne
[Termes IGN] navigation inertielle
[Termes IGN] navigation spatiale
[Termes IGN] occultation du signal
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement en intérieur
[Termes IGN] positionnement par GNSS
[Termes IGN] poursuite de satellite
[Termes IGN] radiofréquence
[Termes IGN] récepteur GPS
[Termes IGN] signal GNSS
[Termes IGN] simulation
[Termes IGN] système de numérisation mobile
[Termes IGN] traitement du signal
[Termes IGN] transmission de donnéesIndex. décimale : 30.70 Navigation et positionnement Résumé : (Editeur) Over the past few years, the growth of GNSS applications has been staggering. And, this trend promises to continue in the foreseeable future. Placing emphasis on applications development, this unique resource offers a highly practical overview of GNSS (global navigation satellite systems), including GPS. The applications presented in the book range from the traditional location applications to combining GNSS with other sensors and systems and into more exotic areas, such as remote sensing and space weather monitoring. Written by leading experts in the field, this book presents the fundamental underpinnings of GNSS and provides you with detailed examples of various GNSS applications. Moreover, the software included with the book contains valuable processing tools and real GPS data sets to help you rapidly advance your own work in the field. You will find critical information and tools that help give you a head start to embark on future research and development projects. Note de contenu : - Introduction.
- GNSS Signal Acquisition and Tracking.
- Position, Velocity and Time Estimation.
- Differential GNSS: Accuracy and Integrity.
- A GPS Software Receiver.
- Integration of GNSS and INS.
- GNS/INS Case Studies.
- Integrated LADAR, INS and GNSS Navigation.
- Combining GNSS with RF Systems.
- Aviation Applications.
- Integrated GNSS and Loran Systems.
- Indoor and Weak Signal Navigation.
- Space Applications.
- Geodesy and Surveying.
- Atmospheric Sensing Using GNSS.
- Remote Sensing Using Bistatic GNSS Reflections.
- Epilogue.
- New Navigation Signals and Future Systems in Evolution.Numéro de notice : 20459 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Accessibilité hors numérique : Non accessible via le SUDOC Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63026 A-GPS / Franck Van Diggelen (2009)
Titre : A-GPS : assisted GPS, GNSS, and SBAS Type de document : Monographie Auteurs : Franck Van Diggelen, Auteur Editeur : Londres, Washington : Artech House Année de publication : 2009 Collection : GNSS Technology and applications series Importance : 380 p. Format : 18 x 26 cm ISBN/ISSN/EAN : 978-1-59693-374-3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] affaiblissement de la précision
[Termes IGN] éphémérides de satellite
[Termes IGN] GNSS assisté pour la navigation
[Termes IGN] GPS assisté pour la navigation (technologies)
[Termes IGN] positionnement en intérieur
[Termes IGN] positionnement par GPS
[Termes IGN] récepteur GPS
[Termes IGN] système d'extension
[Termes IGN] traitement du signalIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) Assisted GPS (A-GPS) has been developed to provide greatly improved capabilities, helping GPS work better and faster in almost any location. Offering a detailed look at all the technical aspects and underpinnings of A-GPS, this unique book places emphasis on practical implementation. The book reviews standard GPS design, helping you understand why GPS requires assistance in the first place. You discover how A-GPS enables the computing of a position from navigation satellites in the absence of precise time – a topic not covered in any other book. Moreover, you learn how to design and analyze a high sensitivity GPS receiver and determine the achievable sensitivity. The book provides detailed worksheets that show how to compute, analyze, and improve the processing gain from the input signal at the antenna to the signal after the correlators. These worksheets are used in the book to generate families of curves that completely characterize receiver sensitivity, parameterized in terms of front end noise figure, coherent and noncoherent integration times. From this work a law of achievable sensitivity is derived and explained in the book. This cutting-edge volume discusses special forms of assistance data, industry standards for A-GPS, and government mandates for location of mobile phones. You also find coverage of future global navigation satellite systems and how they can be designed specifically for instant-fixes and high sensitivity. The book features numerous tables, worksheets, and graphs that illustrate key topics and provide the equivalent of a technical handbook for engineers who design or use A-GPS. Note de contenu : 1- Introduction
2- Standard GPS Review
3- Assistance, the “A” in A-GPS
4- Coarse Time Navigation: “Instant GPS”
5- Coarse Time Dilution Of Precision
6- High Sensitivity: “Indoor GPS”
7- Generating Assistance Data
8- Ephemeris Extensions, Long Term Orbits
9- Industry Standards and Government Mandates
10- Future A-GNSSNuméro de notice : 20463 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Accessibilité hors numérique : Non accessible via le SUDOC Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63027 Precise point positioning with GPS: A new approach for positioning, atmospheric studies, and signal analysis / Rodrigo Figueiredo Leandro (2009)
Titre : Precise point positioning with GPS: A new approach for positioning, atmospheric studies, and signal analysis Type de document : Thèse/HDR Auteurs : Rodrigo Figueiredo Leandro, Auteur Editeur : Fredericton [Canada] : University of New Brunswick Année de publication : 2009 Collection : Technical report num. 267 Importance : 232 p. Format : 21 x 30 cm Note générale : bibliographie
Ph.D. dissertation, Department of Geodesy and Geomatics Engineering, University of New Brunswick, Fredericton, New Brunswick, CanadaLangues : Anglais (eng) Descripteur : [Termes IGN] bruit (théorie du signal)
[Termes IGN] erreur systématique
[Termes IGN] estimation statistique
[Termes IGN] horloge atomique
[Termes IGN] modèle atmosphérique
[Termes IGN] positionnement ponctuel précis
[Termes IGN] récepteur monofréquence
[Termes IGN] retard ionosphèrique
[Termes IGN] trajet multipleRésumé : (auteur) Precise Point Positioning (PPP) is one of the existing techniques to determine point coordinates using a GPS (Global Positioning System) receiver. In this technique observations collected by a single receiver are used in order to determine the three components of the coordinates, as well as other parameters, such as the receiver clock error and total neutral atmosphere delay. The PPP technique is the subject of this thesis. The idea is that PPP could be used not only for positioning, but for a number of different tasks, as GPS data analysis. The observation model used in this technique has to take into consideration a number of effects present on GPS signals, and observations are un-differenced (there are no differences between receivers or between satellites). This makes PPP a powerful data analysis tool which is sensible to a variety of parameters. When the observation model is designed for positioning, most of these parameters (e.g., satellite clocks) are used as known quantities, but in this research the observation model was modified and enhanced to develop a PPP package that can be used as a tool for determining other parameters rather than position, receiver clock error and neutral atmosphere delay. These estimated parameters include ionospheric delay, code biases, satellite clock errors, and code multipath plus noise. Existing neutral atmosphere delay models have also been studied in this thesis, and an enhanced model has been developed and has had its performance assessed. The development of the model is based on measured meteorological parameters, and the rationale of the model is established in order to make its use as practical as possible for users of positioning techniques, such as PPP. Note de contenu : 1. Introduction
1.1. Motivation
1.2. Objectives and contributions
1.3. Outline of the thesis
2. Precise Point Positioning and GPS Analysis and Positioning Software (GAPS)
2.1. A bit of history, and GAPS’s role in PPP research and development
2.2. The positioning observation model
2.3. Observations adjustment
2.4. Corrections
3. Ionospheric delay estimation filter
3.1. Introduction
3.2. Ionospheric delay estimation filter
3.3. Results analysis
3.4. Chapter remarks
4. Estimation of code biases by means of PPP
4.1. Introduction
4.2. PPP-based P1-C1 code bias estimation
4.3. PPP-based P2-C2 code bias estimation
4.5. Chapter remarks
5. Code multipath and noise estimation with PPP
5.1. Iono-free code multipath plus noise estimates
5.2. L1 and L2 code multipath plus noise estimates
5.3. Comparison with TEQC
5.4. Analysis of L2C code quality
5.5. Chapter remarks
6. Single-receiver satellite pseudo-clock estimation
6.1. Derivation of the satellite pseudo-clocks
6.2. An example of generation and use of satellite pseudo-clocks
6.3. Chapter remarks
7. Neutral Atmosphere prediction models for GNSS positioning
7.1. Introduction
7.2. UNB wide area models
7.3. UNB wide area model for North America – UNBw.na
7.4. UNBw.na validation with ray-traced delays
7.5. Chapter remarks
8. Conclusions and recommendationsNuméro de notice : 14901 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Note de thèse : PhD : Geodesy and Geomatics Engineering : University of New Brunswick : Canada : 2009 DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76787
[article]
Titre : Machine control systems Type de document : Article/Communication Auteurs : Mathias Lemmens, Auteur Année de publication : 2008 Article en page(s) : pp 32 - 33+11 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] géonavigateur
[Termes IGN] guidage de forage
[Termes IGN] guidage de véhicules
[Termes IGN] positionnement par GNSS
[Termes IGN] récepteur GNSSRésumé : (Documentaliste) Les "machine control systems" ont évolué grâce aux récepteurs GNSS et à l'usage de modèles numériques de surface. Ils sont passés du guidage en 2D au guidage en 3D. Intégrant divers capteurs, ils télécommuniquent sans fil et apportent une solution efficace pour le guidage. Pour le sous-sol, ils devraient aussi disposer des données sur les réseaux souterrains pour éviter les risques de dommage. Numéro de notice : A2008-463 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29532
in GIM international > vol 22 n° 12 (December 2008) . - pp 32 - 33+11[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-08121 RAB Revue Centre de documentation En réserve L003 Disponible Documents numériques
en open access
a2008-463_machine_control_systems_lemmens.pdfAdobe Acrobat PDF Un point sur le réseau Teria : rencontre avec Patrick Di Renzo, directeur commercial d'Exagone, l'exploitant du réseau GPS permanent TERIA / Anonyme in Géomatique expert, n° 65 (01/11/2008)PermalinkProbabilities and Multipath : Multipath mitigation techniques using maximum-likelihood principle / Mohamed Sahmoudi in Inside GNSS, vol 3 n° 8 (November - December 2008)PermalinkRadio technology in the fiels: get the best out of your radios / A. Kluft in Geoinformatics, vol 11 n° 7 (01/11/2008)PermalinkTERIA : commentaires et suggestions / Anne Fantuzzi in Géomètre, n° 2050 (juillet - août 2008)PermalinkInterference heads-up: receiver techniques for detecting and characterizing RFI [radio-frequency interference] / P. Ward in GPS world, vol 19 n° 6 (June 2008)PermalinkMaking a difference with GPS: time differences for kinematic positioning with low-cost receivers / J. Traugott in GPS world, vol 19 n° 5 (May 2008)PermalinkPermalinkDifférents types de récepteurs GPS et de modes de réception / Michel Kasser in Géomètre, n° 2044 (janvier 2008)PermalinkPermalinkLe Recorder / Marie Lambois (2008)Permalink