Exploració per tema "Satèl·lits artificials en telecomunicació"
Ara es mostren els items 21-40 de 214
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Advanced signal processing techniques for fixed and mobile satellite communications
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialEnabling ultra fast systems has been widely investigated during recent decades. Although polarization has been deployed from the beginning in satellite communications, nowadays it is being exploited to increase the throughput ... -
Alternativas para una “canalización subóptima” del espectro radioeléctrico permitido al satélite de telecomunicaciones europeo ECS
(1979)
Text en actes de congrés
Accés obert -
An Android real-time kernel and system interface for open nano-satellite constellations
(Universitat Politècnica de Catalunya, 2016-06)
Treball Final de Grau
Accés obertL'objectiu d'aquest treball és dissenyar i implementar part de l'arquitectura de software per a una plataforma de desenvolupament de nano-satèl·lits oberta basada en Android. Per un costat, afegir temps real al kernel. Per ... -
An IBC solar cell for the UPC CubeSat-1 mission
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work the fabrication and electrical characterization of interdigitated back contact IBC solar cells is shown. These solar cells have been specifically designed for a CubeSat based satellite under developement at ... -
An innovative interference mitigation approach for high throughput satellite systems
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper investigates how to boost the forward link capacity in multibeam satellite systems. Since co-channel interference is the main inhibitor to achieve the full potential of frequency reuse, we propose to mitigate ... -
An overview of design criteria for satellites communications and space systems
(Universitat Politècnica de Catalunya, 2024-02-15)
Projecte Final de Màster Oficial
Accés obertThis work will try to give an overview of the origin of the most impacting effects that cause disturbances in space systems. Both, the nature of the effect on the system and the design methodologies commonly used to protect ... -
Analysis of perturbations and station-keeping requirements in highly-inclined geosynchronous orbits
(2015)
Text en actes de congrés
Accés obertThere is a demand for communications services at high latitudes that is not well served by conventional geostationary satellites. Alternatives using low-altitude orbits require too large constellations. Other options are ... -
Analysis of scintillation measurement errors in GNSS signals
(Universitat Politècnica de Catalunya, 2019-04-24)
Treball Final de Grau
Accés obert
Realitzat a/amb: Politecnico di TorinoScintillation is a disturbance induced by the ionosphere, the farther layer of the atmosphere in which free ions (electrons) are present. These electrons vary in quantity according to many factors related to Solar activity ... -
Análisis y caracterización del rizado "scalloping" en imágenes radar scansar y topsar
(Universitat Politècnica de Catalunya, 2011-03-25)
Projecte/Treball Final de Carrera
Accés obertCatalà: En els últims anys el nombre de missions que utilitzen radars de tipus SAR està augmentant considerablement degut a les bones prestacions que ofereixen en front de les possibles condicions climatològiques adverses. ... -
Application of network coding in satellite broadcast and multiple access channels
(Universitat Politècnica de Catalunya, 2013-02-12)
Tesi
Accés obertSatellite broadcasting and relaying capabilities enable mobile broadcast systems over wide geographical areas, which opens large market possibilities for handheld, vehicular and fixed user terminals. The geostationary (GEO) ... -
Architectural Model for Evaluating Space Communication Networks
(Universitat Politècnica de Catalunya / Massachusetts Institute of Technology, 2012-12)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Massachusetts Institute of Technology[ANGLÈS] The space exploration endeavor started in 1957 with the launch and operation of the first manmade satellite, the URSS Sputnik 1. Since then, multiple space programs have been developed, pushing the limits of ... -
Architectural optimization results for a network of earth-observing satellite nodes
(2017)
Text en actes de congrés
Accés obertEarth observation satellite programs are currently facing, for some applications, the need to deliver hourly revisit times, sub-kilometric spatial resolutions and near-real-time data access times. These stringent requirements, ... -
Assessment of satellite contacts using predictive algorithms for autonomous satellite networks
(Institute of Electrical and Electronics Engineers (IEEE), 2020-05-28)
Article
Accés obertUpcoming Low Earth Orbit Satellite Networks will provide low-latency and high downlink capacity necessary for future broadband communications and Earth Observation missions. This architecture was proposed at the beginning ... -
Attitude Determination Control! System Software for Nano-Satellites
(Universitat Politècnica de Catalunya, 2015-10-26)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
Automatic ship detection in SAR satellite images: performance assessment
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper presents the benchmarking of four ship detection systems based on satellite borne Synthetic Aperture Radar data. This research, carried out within the framework of the FP7 NEREIDS project, provides a detailed ... -
Avaluació de perfils de canal satèl·lit per a estratègies d'accés aleatori
(Universitat Politècnica de Catalunya, 2016-10)
Projecte/Treball Final de Carrera
Accés obertThe random access protocols are a key element of the communication systems when a population of potential users need to transmit small packets over a shared communication medium. One of such protocols is known as the ... -
Benefits of using mobile ad-hoc network protocols in federated satellite systems for polar satellite missions
(Institute of Electrical and Electronics Engineers (IEEE), 2018-09-19)
Article
Accés obertThe Operational Network of Individual Observation Nodes (ONION) project evaluated the benefits of applying Distributed Satellite System (DSS) architectures to Earth Observation. One of its outcomes is the identification ... -
Bistatic SAR data acquisition and processing using SABRINA-X, with TerraSAR-X as the opportunity transmitter
(Universitat Politècnica de Catalunya, 2010-07)
Projecte Final de Màster Oficial
Accés obertThis thesis investigates the acquisition and processing of Bistatic SAR data using SABRINA-X, and with TerraSAR-X as the transmitter of opportunity. SABRINA-X is an X-band receiver system that has been recently designed ... -
Blind Algorithms Characterization in Telecommunications context
(Universitat Politècnica de Catalunya, 2014-09-24)
Projecte/Treball Final de Carrera
Accés restringit per acord de confidencialitat -
Business model development of a Telecom company at VLEO (Very Low Earth Orbit)
(Universitat Politècnica de Catalunya, 2021-05-21)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThe space market is experiencing a tremendous transformation with private companies taking the lead and launching an increasing number of satellites. Up until recently, geostationary orbits were the most used for commercial ...