Exploració per tema "Artificial satellites in telecommunication"

Ara es mostren els items 21-40 de 201

    • Advanced signal processing techniques for fixed and mobile satellite communications 

      Henarejos Hernández, Pol; Pérez Neira, Ana Isabel; Mazzali, N.; Mosquera Nartallo, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Enabling 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 

      Agustí Comes, Ramon; Delgado Penin, José Antonio (1979)
      Text en actes de congrés
      Accés obert

    • An Android real-time kernel and system interface for open nano-satellite constellations 

      Marí Barceló, Marc (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      L'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 

      Ortega Villasclaras, Pablo Rafael; Jové Casulleras, Roger; Pedret, A; Gonzalvez, G.; López Rodríguez, Gema; Martín García, Isidro; Domínguez Pumar, Manuel; Alcubilla González, Ramón; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In 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 

      Caus, Marius; Pérez Neira, Ana Isabel; Angelone, Martina; Ginesi, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This 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 

      Álvarez Alonso, Jesús (Universitat Politècnica de Catalunya, 2024-02-15)
      Projecte Final de Màster Oficial
      Accés obert
      This 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 

      Fantino, Elena; Flores Le Roux, Roberto Maurice; Di Salvo, Alessio; Di Carlo, Marilena (2015)
      Text en actes de congrés
      Accés obert
      There 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 ...

    • Análisis y caracterización del rizado "scalloping" en imágenes radar scansar y topsar 

      López Bustamante, Jordi (Universitat Politècnica de Catalunya, 2011-03-25)
      Projecte/Treball Final de Carrera
      Accés obert
      Català: 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. ...

    • Architectural Model for Evaluating Space Communication Networks 

      Sánchez Net, Marc (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 

      Araguz López, Carles; Llaveria Godoy, David; Lancheros Sepulveda, Estefany Maria; Bou Balust, Elisenda; Camps Carmona, Adriano José; Alarcón Cot, Eduardo José; Lluch i Cruz, Ignasi; Matevosyan, Hripsime; Golkar, Alessandro; Tonetti, Stefania; Cornara, Stefania; Cote, Judith; Pierotti, Stéphane; Rodríguez, Pedro; Alvaro Sanchez, A.; Sochacki, Mateusz; Narkiewicz, Janusz (2017)
      Text en actes de congrés
      Accés obert
      Earth 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 

      Ruiz De Azúa Ortega, Juan Adrián; Ramírez, Victoria; Hyuk, Park; Calveras Augé, Anna M.; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2020-05-28)
      Article
      Accés obert
      Upcoming 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 

      Juan Martínez, Enric (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 

      Stasolla, Mattia; Santamaría, Carlos; Mallorquí Franquet, Jordi Joan; Margarit Martín, Gerard; Walker, Nick (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This 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 

      Boixereu Vozmediano, Max (Universitat Politècnica de Catalunya, 2016-10)
      Projecte/Treball Final de Carrera
      Accés obert
      The 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 

      Ruiz de Azúa Ortega, Joan Adrià; Camps Carmona, Adriano José; Calveras Augé, Anna M. (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-19)
      Article
      Accés obert
      The 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 

      Siddique, Muhammad Adnan (Universitat Politècnica de Catalunya, 2010-07)
      Projecte Final de Màster Oficial
      Accés obert
      This 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 

      Piñol Bunthama, Jonatan (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) 

      Jou Elena, Alèxia (Universitat Politècnica de Catalunya, 2021-05-21)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      The 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 ...

    • Characterization of the effects of multi-tap filtering on FBMC/OQAM systems 

      Caus, Marius; Pérez Neira, Ana Isabel; Kliks, Adrian (HINDAWI, 2014-06-05)
      Article
      Accés obert
      The filter bank multicarrier modulation based on offset quadrature amplitude modulation (FBMC/OQAM) is being considered as an eligible technology for future wireless communications. However, the orthogonality may be destroyed ...

    • Classification strategies for multi-temporal Sentinel-1 data 

      Pons Serra, Adrià (Universitat Politècnica de Catalunya, 2021-06)
      Treball Final de Grau
      Accés obert
      Earth observation technologies provide us with a large amount of information and have many diverse applications. In this thesis, we focus on classifying land cover using SAR sensors from the Sentinel-1 satellites. The ...