Browsing by Subject "Radio relay systems"

Now showing items 1-13 of 13

    • A survey of propagation channel modelling for UAV communications 

      Sala Sucarrats, Oriol (Universitat Politècnica de Catalunya, 2018-07)
      Bachelor thesis
      Open Access
      Covenantee:   Linköpings Universitet
      The purpose of this project is to make a survey about channel propagation models in Air to Ground communications, also found in low altitude Unmanned Aircraft Vehicles links. The project consists on gathering the literature ...

    • Acceso a contenido en plataforma Raspberry Pi 

      Bades, Maria Ramona (Universitat Politècnica de Catalunya, 2016-07-15)
      Bachelor thesis
      Restricted access - author's decision
      In this project was developed an application in Android and a script in Python which makes the Bluetooth communication between a mobile device and a Raspberry Pi 2. The communication consists in the transmission data, such ...

    • Anàlisi de redundància dels nodes d'una xarxa 

      Gomariz Gimena, Gerard (Universitat Politècnica de Catalunya, 2017-01)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Xarxa Oberta de Catalunya
      The main goal of this project is to provide redundancy to the nodes of a Network, in this case the Network is owned by Xarxa Oberta de Catalunya. Different aspects will be analyzed with the goal to determine if that node ...

    • Comportamiento de un circuito recuperador de portadora en presencia de una propagación multicamino para un radioenlace a 140Mb/s 

      Agustí Comes, Ramon (Unión Científica Internacional de Radio (URSI), 1983)
      Conference report
      Open Access
      This paper gives the variance of the phase recovered by a conventional quadriphase Costas loop in 16 QAM modulation in the presence of selective fading, represented as a two rays simplified model. The phase error variance ...

    • Monitorización de radioenlaces digitales de gran capacidad 

      Agustí Comes, Ramon; Casadevall Palacio, Fernando José (Universidad de Sevilla, 1984)
      Conference report
      Open Access
      In digital radio links, where the transmission quality is determined by the average error rate, a pseudo-error method is presented to monitor the link performance. Results are shown for a 16 QAM modulation system and 140Mb/s ...

    • Network MIMO for downlink in-band relay transmissions with relaying phases of fixed duration 

      Agustín de Dios, Adrián; Vidal Manzano, José; Lagén Morancho, Sandra; Valera, Eduard (2011)
      Conference report
      Restricted access - publisher's policy
      A half-duplex relay station (RS)-based cellular system deployment is considered, where multiple base stations (BS) cooperate in the BS-RS in-band transmission for the downlink. The duration of the relay-receive and the ...

    • On the reusage of primary radio resources through the exploitation of the spatiotemporal robustness of the MIMO transmissions 

      Medina Acosta, Gerardo Agni; Delgado Penin, José Antonio (2012-09-20)
      Article
      Open Access
      The spatiotemporal robustness of the MIMO transmissions is exploited aiming at inducing opportunistic secondary communications on the primary radio resources. The proposed model makes use of the smallest singular values ...

    • Planejament, anàlisi i realització de radioenllaços mòbils per a TV 

      Heras Miguel, Eduardo (Universitat Politècnica de Catalunya, 2007-07-06)
      Master thesis (pre-Bologna period)
      Open Access
      Els radioenllaços mòbils, també anomenats semi fixos, ens permeten efectuar una transmissió del senyal de televisió des de qualsevol localització, inclús en punts remots del país, zones boscoses o serralades, sempre que ...

    • Radioenlace digital a 11 GHz para telemando y telecontrol 

      Artal, E.; Cardama Aznar, Ángel; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Elias Fusté, Antoni; Ferrando, Miguel; Jofre Roca, Lluís; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1984)
      Conference report
      Open Access
      A digital radio-relay link in the band 10.7- 11.7 GHz developed for the remote control system of ENHER is presented. The objectives were the construction of a reliable and yet low-cost transmitter-receiver. To accomplish ...

    • Resource allocation for multi-user massive MIMO sytems 

      Giramé Rizzo, Gerard (Universitat Politècnica de Catalunya, 2018-07-03)
      Bachelor thesis
      Open Access
      Much higher area data throughput is required in future cellular networks, since the global demand for wireless data traffic is continuously growing. Massive MIMO is one of the most promising candidate technologies for ...

    • S-band downlink for nanosatellites 

      Fernández Capón, Lara (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      The development Nanosatellites has experienced an enormous growth in these past years; becoming more complex and versatile. The NanoSat Lab, located in the Universitat Politècnica de Catalunya, aims to explore and develop ...

    • Sparse model identification of a 4x4 MIMO channel measurements in 5 GHz band 

      Esbri Vidal, Laura (Universitat Politècnica de Catalunya, 2018-07)
      Bachelor thesis
      Open Access
      The Least Absolute Shrinkage and Selection Operator has gained attention in the applied mathematics and signal processing communities. The thesis provides us theoretical expressions for solving Compressive Sensing by the ...

    • Technoeconomic evaluation of cooperative relaying transmission techniques in OFDM cellular networks 

      Moral, Antolín; Vidal Manzano, José; Pérez, Jorge; Agustín de Dios, Adrián; Marina, Ninoslav; Host-Madsen, Anders (HINDAWI, 2011-02-27)
      Article
      Restricted access - publisher's policy
      We evaluate the costs in the deployment of a 4G relay-assisted network in the 2.6GHz band following a technoeconomic methodology that departs fromcell dimensioning based on spectral efficiency and outage capacity requirements. ...