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Data publikacji: 6 września 2023

Data aktualizacji: 31 lipca 2025

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1

Casile, Roberta <1986&gt. "GNSS interference management techniques against malicious attacks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7025/1/Casile_Roberta_tesi.pdf.

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This thesis collects the outcomes of a Ph.D. course in Telecommunications Engineering and it is focused on the study and design of possible techniques able to counteract interference signal in Global Navigation Satellite System (GNSS) systems. The subject is the jamming threat in navigation systems, that has become a very increasingly important topic in recent years, due to the wide diffusion of GNSS-based civil applications. Detection and mitigation techniques are developed in order to fight out jamming signals, tested in different scenarios and including sophisticated signals. The thesis i

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Casile, Roberta <1986&gt. "GNSS interference management techniques against malicious attacks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7025/.

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This thesis collects the outcomes of a Ph.D. course in Telecommunications Engineering and it is focused on the study and design of possible techniques able to counteract interference signal in Global Navigation Satellite System (GNSS) systems. The subject is the jamming threat in navigation systems, that has become a very increasingly important topic in recent years, due to the wide diffusion of GNSS-based civil applications. Detection and mitigation techniques are developed in order to fight out jamming signals, tested in different scenarios and including sophisticated signals. The thesis i

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Egea-Roca, Daniel. "Change detection techniques for GNSS signal-level integrity." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/458425.

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El gran éxito y la facilidad de uso de los sistemas de navegación global por satélite (GNSSs) ha conducido a la definición de una gran cantidad de aplicaciones basadas en GNSS sin precedentes. De hecho, la tendencia muestra una nueva era de aplicaciones basadas en GNSS, las denominadas aplicaciones críticas, en las que la integridad física de los usuarios puede estar en riesgo en caso de un fallo del sistema. Un requisito importante en estas aplicaciones es la integridad, definida como una medida de la fiabilidad y confianza que se tiene en la información proporcionada por el sistema. Los prim

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4

Ferreira, Esteves Paulo Alexandre. "Techniques d'acquisition à haute sensibilité des signaux GNSS." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0016/document.

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Les systèmes de navigation par satellite (GNSS) font partie de notre quotidien. On peut présentement les trouver dans un ensemble d’applications. Avec les nouveaux besoins, des nouveaux enjeux sont aussi apparus : le traitement du signal dans les environnements urbains est extrêmement complexe. Dans cette thèse, le traitement des signaux GNSS à faible puissance est abordé, en particulier dans la première phase du traitement, nommé acquisition de signal. Le premier axe de rechercheporte sur l’analyse et la compensation de l’effet Doppler dans l’acquisition. Le décalage Doppler perçu par l’utili

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GARBIN, MANFREDINI ESTEBAN. "Signal processing techniques for GNSS anti-spoofing algorithms." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2672749.

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The Global Navigation Satellite Systems (GNSS) usage is growing at a very high rate, and more applications are relying on GNSS for correct functioning. With the introduction of new GNSSs, like the European Galileo and the Chinese Beidou, in addition to the existing ones, the United States Global Positioning System (GPS) and the Russian GLONASS, the applications, accuracy of the position and usage of the signals are increasing by the day. Given that GNSS signals are received with very low power, they are prone to interference events that may reduce the usage or decrease the accuracy. Fro

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NGUYEN, DINH THUAN. "ROBUST SIGNAL PROCESSING TECHNIQUES FOR MODERN GNSS RECEIVERS." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2752881.

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Gómez, Casco David. "Non-Coherent Acquisition Techniques for High-Sensitivity GNSS Receivers." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/665404.

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Los sistemas de radionavegación por satélite (GNSSs) se han convertido en una herramienta indispensable de la vida diaria, ya que nos ofrecen la posibilidad de conocer de manera precisa nuestra ubicación en tiempo real y en entornos al aire libre. Desde la aparición de estos sistemas, han surgido una gran cantidad de exitosas aplicaciones de GNSS. Algunos ejemplos de estas aplicaciones son los siguientes: navegación para automóviles, rastreo de vuelos, seguimiento de actividad deportiva y juegos de realidad aumentada. Debido al éxito alcanzado por los sistemas de GNSS, un gran inter

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Albu-Rghaif, Ali. "Multi-GNSS signals acquisition techniques for software defined receivers." Thesis, University of Buckingham, 2015. http://bear.buckingham.ac.uk/105/.

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Any commercially viable wireless solution onboard Smartphones should resolve the technical issues as well as preserving the limited resources available such as processing and battery. Therefore, integrating/combining the process of more than one function will free up much needed resources that can be then reused to enhance these functions further. This thesis details my innovative solutions that integrate multi-GNSS signals of specific civilian transmission from GPS, Galileo and GLONASS systems, and process them in a single RF front-end channel (detection and acquisition), ideal for GNSS softw

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Baños, García Adrián. "Use of precise point positioning techniques in GNSS applications." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76090.

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TANG, XINHUA. "Development and Analysis of Advanced Techniques for GNSS Receivers." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2546939.

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With the rapid development of digital techniques, the concept of software-defined radio (SDR) emerged which accelerates the first appearance of of the real-time GNSS software receiver at the beginning of this century, in the frame of a software receiver, this thesis mainly explores the possible improvement in parameters estimate such as frequency estimate, code delay estimate and phase estimate. In the first stage, acquisition process is focused, the theoretical mathematical expression of the cross-ambiguity function (CAF) is exploited to analyze the grid and improve the accuracy of the fre

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11

Buchanan, Matthew L. "Investigation of Advanced Spaceborne GNSS-R Techniques Usingthe SMAP Satellite." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565890319858178.

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Seals, Kelly Charles. "Enhanced Acquisition Techniques for GPS L1C Receivers." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-dissertations/71.

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A new, open-access Global Positioning System (GPS) signal, known as L1C, is the most recent of several modernized Global Positioning System (GPS) signals. The first launch of a GPS satellite with this signal is expected to occur within a few years. One of the interesting features of modern Global Navigation Satellite System (GNSS) signals, including GPS L1C, is the presence of data and pilot components. The pilot component is a carrier with a deterministic overlay code but no data symbols; whereas, the data component carries the navigation data symbols used in the receiver processing. A uni

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13

Locubiche-Serra, Sergi. "Robust Carrier Tracking Techniques for GNSS Receivers affected by Ionospheric Scintillation." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/668304.

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Las tecnologías de posicionamiento por satélite (GNSS, del inglés global navigation satellite systems) se han convertido en una herramienta indispensable en diferentes ámbitos de nuestra sociedad moderna. Algunos ejemplos de aplicaciones son el posicionamiento y la navegación en entornos terrestre, marítimo y aéreo, así como usos destinados a la agricultura, topografía o aplicaciones de sincronización precisa en sistemas de telecomunicaciones o finanzas. El módulo de tracking es una de las etapas centrales para mantener los receptores alineados con los satélites, y hasta ahora se han empleado

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14

ROMERO, GAVIRIA RODRIGO MANUEL. "Estimation Techniques and Mitigation Tools for Ionospheric effects on GNSS Receivers." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2616928.

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Navigation is defined as the science of getting a craft or person from one place to another. The development of radio in the past century brought fort new navigation aids that enabled users, or rather their receivers, to compute their position with the help of signals from one or more radio-navigation system . The U.S. Global Positioning System (GPS) was envisioned as a satellite system for three-dimensional position and velocity determination fulfilling the following key attributes: global coverage, continuous/all weather operation, ability to serve high-dynamic platforms, and high accuracy.

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15

BERARDO, MATTIA. "GNSS Integrity Monitoring assisted by Signal Processing techniques in Harsh Environments." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2675456.

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The Global Navigation Satellite Systems (GNSS) applications are growing and more pervasive in the modern society. The presence of multi-constellation GNSS receivers able to use signals coming from different systems like the american Global Positioning System (GPS), the european Galileo, the Chinese Beidou and the russian GLONASS, permits to have more accuracy in position solution. All the receivers provide always more reliable solution but it is important to monitor the possible presence of problems in the position computation. These problems could be caused by the presence of impairments give

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16

Closas, Gómez Pau. "Bayesian signal processing techniques for GNSS receivers: from multipath mitigation to positioning." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/6942.

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Aquesta tesi gira al voltant del disseny de receptors per a sistemes globals de navegació per satèl·lit (Global Navigation Satellite Systems, GNSS). El terme GNSS fa referència a tots aquells sistemes de navegació basats en una constel·lació de satèl·lits que emeten senyals de navegació útils per a posicionament. El més popular és l'americà GPS, emprat globalment. Els esforços d'Europa per a tenir un sistema similar veuran el seu fruit en un futur proper, el sistema s'anomena Galileo. Altres sistemes globals i regionals existeixen dissenyats per al mateix objectiu: calcular la posició dels re

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17

Marchán, Hernandez Juan Fernando. "Sea state determnation using GNSS-R techniques: contributions to the PAU instrument." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/6932.

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El inminente lanzamiento de la misión Soil Moisture and Ocean Salinity (SMOS, humedad del terreno y salinidad del mar) de la Agencia Espacial Europea (ESA) permitirá la recuperación sistemática y a escala global de la salinidad superficial del mar, con el consecuente beneficio tanto para oceanografía como para la climatología. No obstante, primero es necesario modelar y compensar adecuadamente el impacto de la rugosidad del mar en las medidas radiométricas, a fin de reducir el error inducido en la SSS recuperada y obtener valores significativos. En los últimos años el uso de señales reflejada

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18

Kuratomi, Alejandro. "GNSS Position Error Estimated by Machine Learning Techniques with Environmental Information Input." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262692.

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In Intelligent Transport Systems (ITS), specifically in autonomous driving operations, accurate vehicle localization is essential for safe operations. The localization accuracy depends on both position and positioning error estimates. Technologies aiming to improve positioning error estimation are required and are currently being researched. This project has investigated machine learning algorithms applied to positioning error estimation by assessing relevant information obtained from a GNSS receiver and adding environmental information coming from a camera mounted on a radio controlled vehic

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19

Raimondi, Mathieu. "Développement et caractérisation de techniques de réduction d’interférences pulsées pour récepteurs GNSS embarqués." Toulouse, INSA, 2008. http://eprint.insa-toulouse.fr/archive/00000275/.

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Les organismes de standardisation de l'aviation civile (OACI, RTCA, EUROCAE) mènent actuellement des études sur l'utilisation des systèmes de navigation par satellite fournissant une couverture globale, tels GPS ou Galileo, en tant que moyen de navigation embarque unique. L'OACI regroupe l’ensemble de ces systèmes de navigation satellitaires et de leurs systèmes d’augmentation sous la dénomination GNSS. Pour des raisons de sécurité évidentes, les performances des récepteurs GNSS embarques doivent garantir des minima propres à chaque phase de vol et chaque procédure d’approche. Ces exigences de

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20

Flohrer, Claudia. "Mutual validation of satellite-geodetic techniques and its impact on GNSS orbit modeling /." Bern : [s.n.], 2008. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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21

Roudier, Marion. "Définition de signaux et de techniques de traitement innovants pour les futurs systèmes GNSS." Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0044/document.

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Les systèmes de navigation par satellites sont de plus en plus présents dans notre vie quotidienne. De nouveaux besoins émergent, majoritairement en environnement urbain. Dans ce type d'environnement très obstrué, le signal reçu par l'utilisateur a subit des atténuations ainsi que des réfractions/diffractions, ce qui rend difficile la démodulation des données et le calcul de position de l'utilisateur. Les signaux de navigation par satellites étant initialement conçus dans un contexte d'environnement dégagé, leurs performances de démodulation sont donc généralement étudiées dans le modèle de ca

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22

Legru, Benoît. "Mesure de déformation par combinaison de techniques géodésiques : Auscultation par GPS et topométrie." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2011. http://tel.archives-ouvertes.fr/tel-00736511.

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La Terre est une planète en constante évolution et sa surface ne cesse de se transformer. Ses déformations soulèvent des questionnements. Depuis plusieurs années, le L2G de l'ESGT s'intéresse à l'étude des déformations par inter comparaison de techniques. Il dispose en cela de différents procédés de mesure. Puis au fil du temps, le laboratoire s'interroge sur l'intérêt de réaliser une combinaison entre différentes techniques de mesure afin d'observer des déformations fines et précises (quelques millimètres).L'objectif de cette thèse est de démontrer l'intérêt de combiner des mesures GNSS et de

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Zoulida, Myriam. "Determination of terrestrial frames by optimal combination of GNSS, DORIS and SLR measurements." Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC050.

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L'approche actuelle pour la réalisation du Repère Terrestre International de Reference (International Terrestrial Reference Frame - ITRF) consiste à réduire les observations de chaque technique de géodésie spatiale dans des solutions indépendantes. Le seul moyen de rattacher les repères spécifiques à chaque technique pour obtenir un repère combiné homogène est alors d'utiliser des rattachements topométriques entre les stations des différentes techniques co-localisées sur le même site d'observations. Cependant, les incohérences entre ces rattachements locaux et les estimations des positions des

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Lima, Daniel Valle de. "Multipath mitigation in time-delay estimation via tensorbased techniques for antenna array-based gnss receivers." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/23730.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2017.<br>Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2017-06-19T19:41:18Z No. of bitstreams: 1 2017_DanielVoltedeLima.pdf: 996662 bytes, checksum: 36ce9f105c83e143c174dac8585b777d (MD5)<br>Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2017-06-23T18:16:56Z (GMT) No. of bitstreams: 1 2017_DanielVoltedeLima.pdf: 996662 bytes, checksum: 36ce9f105c83e143c174dac8585b777d (MD5)<br>Made available in DSpace on 2017-06-23T18:16:56Z (GMT). No. of bitstrea

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Isioye, Olalekan Adekunle. "An Investigation of Ground-Based GNSS Atmospheric Remote Sensing Techniques for Weather and Climate Monitoring in Nigeria." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/60814.

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Radio signals from Global Navigation Satellite Systems (GNSS) satellites suffer delay as they propagate through the atmosphere (neutral and non-neutral) and this delay is partially driven by the water vapour content in the atmosphere. The delay component due to the non-neutral atmosphere (ionosphere) is removed through the use of dual frequency GNSS receivers. The main tropospheric parameter is the zenith tropospheric (or total) delay (ZTD), which is a widely accepted parameter with which to express the total delay in the signal from all satellites due to the neutral atmosphere. The ZTD

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MUSUMECI, LUCIANO. "Advanced signal processing techniques for interference removal in Satellite Navigation Systems." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2550137.

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This thesis investigates the use of innovative interference detection and mitigation techniques for GNSS based applications. The main purpose of this thesis is the development of advanced signal processing techniques outperforming current interference mitigation algorithms already implemented in off-the-shelf GNSS receivers. State-of-the-art interference countermeasures already investigated in literature, which process the signal at the ADC output, provide interference components suppression in the time domain or in the frequency domain, thus leading to a significant signal degradation in harm

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Bin, Syed Mohd Dardin Syed Mohd Fairuz. "Étude d'algorithmes de poursuite du signal GNSS permettant d'améliorer le positionnement en environnement urbain." Thesis, Toulouse, ISAE, 2015. http://www.theses.fr/2015ESAE0008/document.

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Cette activité de recherche concerne le domaine de la navigation par satellite qui utilise lessystèmes GNSS (Global Navigation Satellite Systems). Elle vise à améliorer les performances globalesd’un système de navigation, c’est à dire la robustesse, la disponibilité et l’intégrité d’un récepteurutilisant les signaux GNSS pour élaborer sa position et sa vitesse. L’enjeu est important et on noteque les représentations des nouveaux signaux proposés pour GPS et GALILEO visent à diminuer lacorrélation entre les signaux, faciliter la poursuite de ces signaux en abaissant le niveau des seuils depours

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28

Homelius, Marcus. "Tracking of Ground Vehicles : Evaluation of Tracking Performance Using Different Sensors and Filtering Techniques." Thesis, Linköpings universitet, Reglerteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148432.

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It is crucial to find a good balance between positioning accuracy and cost when developing navigation systems for ground vehicles. In open sky or even in a semi-urban environment, a single global navigation satellite system (GNSS) constellation performs sufficiently well. However, the positioning accuracy decreases drastically in urban environments. Because of the limitation in tracking performance for standalone GNSS, particularly in cities, many solutions are now moving toward integrated systems that combine complementary sensors. In this master thesis the improvement of tracking performance

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Li, Xingxing [Verfasser], Harald [Akademischer Betreuer] Schuh, Maorong [Akademischer Betreuer] Ge, and Frank [Akademischer Betreuer] Flechtner. "Real-time high-rate GNSS techniques for earthquake monitoring and early warning / Xingxing Li. Gutachter: Frank Flechtner. Betreuer: Harald Schuh ; Maorong Ge." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1075807514/34.

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Tranchant, Yann-Treden. "Vers une meilleure exploitation de l’altimétrie côtière : apports combinés de la modélisation hydrodynamique à haute-résolution et des nouvelles techniques de cartographie du niveau marin par GNSS." Thesis, La Rochelle, 2022. http://www.theses.fr/2022LAROS014.

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La mesure du niveau de la mer par satellite a atteint un niveau sans précédent en termes de précision et de couverture spatio-temporelle. Ces observations nous ont permis d'améliorer notre compréhension de la dynamique à grande échelle des océans, mais leur exploitation reste un défi à l’approche de la côte, où les incertitudes liées à la marée océanique et aux fines échelles du géoïde sont plus importantes. L’objectif de cette thèse est de développer de nouvelles méthodologies s’appuyant sur les mesures mobiles du niveau de la mer par GNSS et la modélisation hydrodynamique afin de mieux explo

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Sicramaz, Ayaz Ayse Verfasser], Bernd [Akademischer Betreuer] [Eissfeller, and Wolfgang [Akademischer Betreuer] Gerstacker. "Weak and Degraded Signal Acquisition Techniques in GNSS Software Receiver / Ayse Sicramaz Ayaz. Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik. Gutachter: Bernd Eissfeller ; Wolfgang Gerstacker. Betreuer: Bernd Eissfeller." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2014. http://d-nb.info/1054300070/34.

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Attia, Dhouha. "Segmentation d'images par combinaison adaptative couleur-texture et classification de pixels. : Applications à la caractérisation de l'environnement de réception de signaux GNSS." Thesis, Belfort-Montbéliard, 2013. http://www.theses.fr/2013BELF0209/document.

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En segmentation d’images, les informations de couleur et de texture sont très utilisées. Le premier apport de cette thèse se situe au niveau de l’utilisation conjointe de ces deux sources d’informations. Nous proposons alors une méthode de combinaison couleur/texture, adaptative et non paramétrique, qui consiste à combiner un (ou plus) gradient couleur et un (ou plus) gradient texture pour ensuite générer un gradient structurel utilisé comme image de potentiel dans l’algorithme de croissance de régions par LPE. L’originalité de notre méthode réside dans l’étude de la dispersion d’un nuage de p

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Daly, Shannen. "Implementation of a State-of-the-Art GNSS Receiver Autonomous Integrity Monitoring Technique." Thesis, West Virginia University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10844210.

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<p> This thesis implements a state-of-the-art solution separation advanced RAIM (ARAIM) algorithm as it is written as reported in the literature. Specifically, a GNSS fault detection and exclusion algorithm for a multi-constellation GNSS was implemented in software and tested against simulated data. RAIM algorithms have been created in many forms over the last couple of decades and are still in development today. The position solution results produced by this ARAIM algorithm were compared to that of a snapshot weighted least squares (WLS) solution in which failed satellites are removed before

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34

Lu, Ye. "Positioning in GNSS-challenged environments : design framework, algorithms and technologies." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2015. http://www.theses.fr/2015TELE0020.

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Tandis que les humains explorent la nature sans relâche, ils font également attention à être plus conscients d'eux-mêmes, à mieux connaître ce qui les entourent, et, par exemple, à être informés de leurs positions, vitesses, ou trajectoires où qu'ils se trouvent. Les systèmes de positionnement par satellites (GNSS) ont fourni une manière de le faire à l'extérieur, devenant un assistant indispensable pour nous. Après le succès de GPS et GLONASS, Galileo et BeiDou sont actuellement en cours de déploiement, offrant plus de choix pour le positionnement autonome ou assisté. Toutefois, les signaux G

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Lu, Ye. "Positioning in GNSS-challenged environments : design framework, algorithms and technologies." Thesis, Evry, Institut national des télécommunications, 2015. http://www.theses.fr/2015TELE0020.

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Tandis que les humains explorent la nature sans relâche, ils font également attention à être plus conscients d'eux-mêmes, à mieux connaître ce qui les entourent, et, par exemple, à être informés de leurs positions, vitesses, ou trajectoires où qu'ils se trouvent. Les systèmes de positionnement par satellites (GNSS) ont fourni une manière de le faire à l'extérieur, devenant un assistant indispensable pour nous. Après le succès de GPS et GLONASS, Galileo et BeiDou sont actuellement en cours de déploiement, offrant plus de choix pour le positionnement autonome ou assisté. Toutefois, les signaux G

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Munghemezulu, Cilence. "Determination of geodetic velocity field parameters for the African tectonic plate using the technique of Global Navigation Satellite Systems." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40360.

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Space geodesy is one of the disciplines that contributes uniquely to the global society; its applications have grown to such an extent that system Earth is better understood today. The current accuracy of the Global Navigation Satellite Systems (GNSS) technique is below centimetre level and this allows very accurate determination of velocity field parameters. This study focused on utilizing GNSS to determine the inter-continental plate velocity field for Africa in support of the African Geodetic Reference Frame (AFREF). Data spanning 12.4 years were processed in the International Terrestrial R

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Guandalini, Marcos. "Análise metodológica do posicionamento relativo através do GNSS e suas aplicações na engenharia: uso da técnica RTK/GSM." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17062013-145658/.

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A utilização dos sistemas de navegação global por satélite, conhecidos pela sigla GNSS (Global Navigation Satellite System), cresceu vertiginosamente durante a última década. Atualmente, os receptores GNSS são ferramentas seguras, eficientes e altamente produtivas para a realização de observações aos satélites, possibilitando determinar coordenadas geodésicas sobre a superfície terrestre. As ferramentas e tecnologias disponíveis no mercado são de essencial importância no desenvolvimento eficiente dos projetos de engenharia. No entanto, o domínio das técnicas de trabalho e o conhecimento profun

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PIERALICE, FEDERICA. "GNSS-based passive radar techniques for maritime surveillance." Doctoral thesis, 2019. http://hdl.handle.net/11573/1242385.

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The improvement of maritime traffic safety and security is a subject of growing interest, since the traffic is constantly increasing. In fact, a large number of human activities take place in maritime domain, varying from cruise and trading ships up to vessels involved in nefarious activities such as piracy, human smuggling or terrorist actions. The systems based on Automatic Identification System (AIS) transponder cannot cope with non-cooperative or non-equipped vessels that instead can be detected, tracked and identified by means of radar system. In particular, passive bistatic radar (PBR) s

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Lee, Yu-Chuan, and 李又權. "Application of M-estimation Techniques for Anti-Spoofing GNSS Navigation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/knf5nx.

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碩士<br>國立臺灣海洋大學<br>通訊與導航工程學系<br>104<br>The global navigation satellite system (GNSS) has been widely used by militaries as well as civilians. The use of GPS in mission-critical applications demands not only precise navigation solutions but solutions which can be used with absolute confidence. Spoofing is a deliberate interference that aims to coerce global navigation satellite system receivers into generating false position/navigation solutions. The GPS system is generally lack of immunity against spoofing attack. As such, spoofing and anti-spoofing algorithms have become an important research

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"Bayesian signal processing techniques for GNSS receivers: from multipath mitigation to positioning." Universitat Politècnica de Catalunya, 2009. http://www.tesisenxarxa.net/TDX-0202110-123003/.

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"Sea state determnation using GNSS-R techniques: contributions to the pau instrument." Universitat Politècnica de Catalunya, 2009. http://www.tesisenxarxa.net/TDX-0529109-095953/.

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Menzione, Francesco. "New on-board multipurpose architecture integrating modern estimation techniques for generalized GNSS based autonomous orbit navigation." Tesi di dottorato, 2017. http://www.fedoa.unina.it/12093/1/Multipurpose_Earth_Orbit_Navigation_System_final_corr_4.pdf.

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This dissertation investigates a novel Multipurpose Earth Orbit Navigation System (MEONS) architecture aiming at providing a generalized GNSS based spacecraft orbit estimation kernel matching the modern navigation instance of enhanced flexibility with respect to multiple Space Service Volume (SSV) applications (Precise Orbit Determination for Earth Observation satellite, Low Thrust Low to High Autonomous Orbit Rising, formation flying relative navigation, Small Satellite Autonomous Orbit Acquisition). The possibility to address theoretical and operational solutions within a unified framework i

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Alsaif, Muhanned. "New Algorithms to Solve the Positioning Problem of Outdoor Localization Using Constrained and Unconstrained Optimization Techniques." Thesis, 2021. http://hdl.handle.net/10754/670250.

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The demand for outdoor precise location is increasing with the development of new applications such as autonomous vehicles, exploration robots and wireless sensor networks. Global Navigation Satellite System (GNSS) is the go-to system for outdoor localization. This thesis focuses on developing new methods for GNSS single-point positioning (SPP) model, where no access to a reference station or precise GNSS parameters is needed. We investigated the limitations of the standard method, least- squares adjustment (LSA), and we derived the Cramer-Rao bounds for the SPP estimation problem. We also inv

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Shrivastava, Mahesh N. "Estimation of strain distribution of the seismogenic regions of india,from gps measurements: numerical modeling,interpretations and implications." Thesis, 2010. http://localhost:8080/xmlui/handle/123456789/1579.

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Chandrasekhar, J. "Performance Analysis Of Post Detection Integration Techniques In The Presence Of Model Uncertainties." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2106.

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In this thesis, we analyze the performance of the Post Detection Integration (PDI) techniques used for detection of weak DS/CDMA signals in the presence of uncertainty in the frequency, noise variance and data bits. Such weak signal detection problems arise, for example, in the first step of code acquisition for applications such as the Global Navigation Satellite Systems (GNSS) based position localization. Typically, in such applications, a combination of coherent and post-coherent integration stages are used to improve the reliability of signal detection. We show that the feasibility of usin

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Chandrasekhar, J. "Performance Analysis Of Post Detection Integration Techniques In The Presence Of Model Uncertainties." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2106.

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In this thesis, we analyze the performance of the Post Detection Integration (PDI) techniques used for detection of weak DS/CDMA signals in the presence of uncertainty in the frequency, noise variance and data bits. Such weak signal detection problems arise, for example, in the first step of code acquisition for applications such as the Global Navigation Satellite Systems (GNSS) based position localization. Typically, in such applications, a combination of coherent and post-coherent integration stages are used to improve the reliability of signal detection. We show that the feasibility of usin

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Feng, Szu-Chun, and 馮思鈞. "Analysis of Multipath Effect in GNSS Positioning Using Multicorrelator Technique." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/59882059205446762533.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>93<br>The thesis is concerned with the use of multicorrelator technique in reducing multipath effect in GNSS application. Although GNSS has been widely used in navigation and survey, its performance is subject to several errors such as ionosphere delay, troposphere delay and multipath. Among which, the multipath effect constitutes one of the most unpredictable error sources. The multicorrelator techniques is analyzed in the thesis to assess its effectiveness in multipath mitigation. Both BPSK and BOC modulations are considered.

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Yen-HuaYeh and 葉燕樺. "Analyzing the Performance of Tightly Coupled INS/GNSS via post-processed Virtual Reference Station technique." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/93302645116989583265.

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碩士<br>國立成功大學<br>測量及空間資訊學系碩博士班<br>101<br>Recently the useage of mobile mapping platform have been raised gradually in Taiwan. Currently mobile mapping technologies always apply INS/GNSS integrated system to get exterior orientation of image by Direct Georeferencing (DG). But the accuracy of DG is affected significantly by the accuracy of INS/GNSS integrated system because the error propagation from INS/GNSS integrated system to DG is linear. So the primary objective to increase the accuracy of mobile mapping system is to enhance the accuracy of INS/GNSS integrated system. This research investig

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(6114419), Tian Zhou. "ALTERNATIVE METHODOLOGIES FOR BORESIGHT CALIBRATION OF GNSS/INS-ASSISTED PUSH-BROOM HYPERSPECTRAL SCANNERS ON UAV PLATFORMS." Thesis, 2019.

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<p>Low-cost unmanned aerial vehicles (UAVs) utilizing push-broom hyperspectral scanners are poised to become a popular alternative to conventional remote sensing platforms such as manned aircraft and satellites. In order to employ this emerging technology in fields such as high-throughput phenotyping and precision agriculture, direct georeferencing of hyperspectral data using onboard integrated global navigation satellite systems (GNSS) and inertial navigation systems (INS) is required. Directly deriving the scanner position and orientation requires the spatial and rotational relationship betw

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