Exploració per tema "MIMO"

Ara es mostren els items 1-20 de 60

    • 5G microwave vs. millimeter-wave MIMO wireless mobile systems 

      Ballesteros Sánchez, Christian (Universitat Politècnica de Catalunya, 2018-07)
      Projecte Final de Màster Oficial
      Accés obert
      The next generation of wireless systems, 5G, is intended to cover plenty of new emerging applications such as utra-high resolution multimedia systems, industry 4.0, self-driving vehicles and smart cities. All those different ...

    • 5G NR small cells deployment using Beamforming 

      Vinyes Marco, Nuria (Universitat Politècnica de Catalunya, 2022-05-24)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Forsk
      5G mobile communication systems should bring significant benefits such as lower latency, higher peak and user data rates, connection density and availability. To achieve such benefits beamforming at the base stations and ...

    • 5G Techniques Proof-of-concept Testbed 

      Sainz Rojas, Manuel (Universitat Politècnica de Catalunya, 2015-05)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Aalborg universitet
      The exponential increase of the data traffic in the next years and the limitations of the wireless spectrum shared by multiusers have challenged the design of the coming 5G radio access technology. In the last decade, ...

    • A real-time MIMO-OFDM mobile WiMAX receiver: architecture, design and FPGA implementation 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (2011-11)
      Article
      Accés restringit per política de l'editorial
      The IEEE 802.16e-2005 standard, also denoted as mobile WiMAX, was introduced as one of the first real efforts towards the deployment of fourth generation communication systems providing fixed and mobile broadband wireless ...

    • A stochastic approach for resource allocation with backhaul and energy harvesting constraints 

      Rubio López, Javier; Muñoz Medina, Olga; Pascual Iserte, Antonio (2016-07)
      Article
      Accés obert
      We propose a novel stochastic radio-resource-allocation strategy that achieves long-term fairness considering backhaul and air-interface capacity limitations. The base station (BS) is powered only with a finite battery ...

    • A survey of 5G-based positioning for industry 4.0: state of the art and enhanced techniques 

      Muthineni, Karthik; Artemenko, Alexander; Vidal Manzano, José; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      The fifth generation (5G) mobile communication technology integrates communication, positioning, and mapping functionalities as an in-built feature. This has drawn significant attention from industries owing to the capability ...

    • Achievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT 

      Torrellas, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (2016-12-01)
      Article
      Accés obert
      The degrees of freedom (DoFs) of the K-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). ...

    • Anàlisi de les característiques del sistema de comunicacions mòbils LTE usant Matlab 

      Liria Masegosa, Meritxell (Universitat Politècnica de Catalunya, 2016-02)
      Treball Final de Grau
      Accés obert
      The recent increased use of mobile data and the development of new applications and services have been the motivations that 3GPP LTE develop the project. Shortly before 2010, the UMTS networks reach 85% of mobile subscribers. ...

    • Análisis del impacto del uso de técnicas de múltiples antenas en una red móvil LTE con la herramienta de simulación ATOLL 

      Perrino Longo, Gian Piero (Universitat Politècnica de Catalunya, 2013-03-12)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] The use of multiple antenna techniques or MIMO (Multiple Input Multiple Output) technologies has for many years been a key tool to improve the spectral efficiency of a wireless communication channel. In other ...

    • Antenna subset selection for spatial modulation: a novel and energy efficient single RF technique 

      Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we propose a closed-loop and single RF multiple-input-multiple-output (MIMO) method, particularly suitable for the Uplink of cellular systems, which is based on the low-complexity and recently devised method ...

    • Avaluació de les prestacions de tècniques MIMO a l’enllaç descendent de 3GPP Long Term Evolution 

      Arcas Serrate, Blanca (Universitat Politècnica de Catalunya, 2010-01-27)
      Projecte/Treball Final de Carrera
      Accés obert
      Aquest treball de fi de carrera es basa en el disseny d’un simulador per tal d’avaluar les tècniques que ofereix el processat MIMO a l’enllaç descendent de 3GPP LTE, a nivell físic. L’enllaç descendent del 3GPP LTE utilitza ...

    • Characteristics and evaluation of IEEE 802.11n standard 

      Garcia Gil, Sergio (Universitat Politècnica de Catalunya, 2013-07-22)
      Treball Final de Grau
      Accés obert
      El objetivo de este trabajo final de carrera es caracterizar y evaluar las diferentes funcionalidades y mejoras que aporta el nuevo estándar IEEE 802.11n respecto a sus antecesores. Para ello se hace un estudio teórico ...

    • Cómo conocer el uso actual de las redes WLAN basadas en IEEE 802.11 

      Tena Carbonell, Xavier (Universitat Politècnica de Catalunya, 2013-12-04)
      Treball Final de Grau
      Accés obert
      The objectives of this work are the analysis of wireless networks based on IEEE 802.11a, 802.11b 802.11g and 802.11n standards. We study various parameters and characteristics to later carry out a statistical study on its ...

    • D21.1 - Description of EuWIn@CTTC technical facilities and interfaces, and preliminary plan of activities 

      Payaró, Miquel; Bertzoudis, Nikolaos; Fernández, Carlos; Closas, Pau; Arribas, Javier; Verdone, Roberto; Gezici, Sinan; Umbert Juliana, Anna; Oestges, Claude; Kryszkiewicz, Pawel; Kaltenberger, Florian; Dardari, Davide (2013-04)
      Report de recerca
      Accés obert
      The nature of this deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive; it introduces the EuWIn lab at large, providing detailed descriptions about its three sites (CTTC, ...

    • Degrees of freedom of the rank-deficient MIMO X channel 

      Agustín de Dios, Adrián; Vidal Manzano, José (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The multiple-input multiple-output (MIMO) X channel with rank-deficient channels is considered. We characterize the total degrees of freedom (DoF) by defining an outer bound which is attained by the proposed precoding ...

    • Development of multi-link geometry-based MIMO channel model 

      Palacios Morales, Alvaro (Universitat Politècnica de Catalunya, 2010-07-31)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Aalto-yliopisto. Sähkötekniikan korkeakoulu
      Forthcoming wireless communication systems need larger capacity. MIMO systems are already an answer that enables to achieve large increase to the link capacity. However, a wide and precise knowledge of the radio propagation ...

    • Diseño e implementación de una red inalámbrica IEEE 802.11n. Línea de base enfocada a un sistema de videoconferencia para realizar teleconsultas entre centros de salud de comunidades aisladas de la Amazonía peruana 

      Santos Hermosa, Oscar (Universitat Politècnica de Catalunya, 2011-11-21)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Pontificia Universidad Católica del Perú
      English: The present document tackles two different subjects. On the one hand, it pretends to expose both the design and the implementation of a Telemedicine network which connects isolated communities in the Peruvian ...

    • Disseny d’una pantalla bidireccional AMC per a un sistema compacte d’antenes a 2.45 GHz 

      Imbert Villà, Marc (Universitat Politècnica de Catalunya, 2010-05)
      Projecte/Treball Final de Carrera
      Accés obert
      Les altes exigències dels recents sistemes de comunicació sense fils fan abocar gran part dels esforços al disseny i desenvolupament de les antenes, sobretot a l’hora de cobrir alguns dels principals requeriments d’un ...

    • Downlink scheduling and resource allocation for 5G MIMO-multicarrier: OFDM vs FBMC/OQAM 

      Femenias Nadal, Guillem; Riera Palou, Felip; Mestre, Xavier; Olmos Bonafé, Juan José (Institute of Electrical and Electronics Engineers (IEEE), 2017-07-20)
      Article
      Accés obert
      OAPA The definition of the next generation of wireless communications, so-called 5G networks, is currently underway. Among many technical decisions, one that is particularly fundamental is the choice of the physical layer ...

    • Energy efficient techniques for 802.11n multiuser MAC WLANs 

      Gajic, Danica; Kartsakli, Elli; Zorba Barah, Nizar; Liß, Christian; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper we evaluate the energy efficiency of MIMO technologies introduced in the emerging IEEE 802.11n standard for infrastructure based WLANs. The main focus is on exploiting multiuser capabilities of MIMO technologies, ...