Now showing items 1-13 of 13

    • A low in-band radiation superregenerative oscillator 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2013-05-27)
      Article
      Open Access
      This brief describes a superregenerative (SR) voltage-controlled oscillator as a building block for SR receivers where most of the oscillator spectrum components are outside the reception frequency band. This allows ...
    • Decentralised multi-access MAC protocol for ad-hoc networks 

      Realp, Marc; Pérez Neira, Ana Isabel (2003)
      Conference report
      Open Access
      In ad-hoc radio networks, mechanisms on how to access the radio channel are extremely important in order to improve network efficiency and, when needed, to guarantee QoS. Traditionally, Medium Access Control (MAC) protocols ...
    • Diseño y realización de receptores VLF 

      Bouchto, Amine (Universitat Politècnica de Catalunya, 2016-02-11)
      Bachelor thesis
      Open Access
      The aim of this project is to design and build a station which can detect certain phenomena taking place in the sun. In order to make it possible, the electromagnetic waves amplitude received in the VLF band (Very Low ...
    • Effect of advanced receivers on performance of cellular systems 

      Mínguez Garcia, David (Universitat Politècnica de Catalunya, 2012-12-21)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Covenantee:   Aalto-yliopisto. Sähkötekniikan korkeakoulu
      Demand for always available high-rate mobile data services is growing rapidly. This puts stress on mobile networks which have to be able to handle increasing mobile traffic demand. MIMO is used in the latest radio communication ...
    • Rate balancing in the vector BC with erroneous CSI at the receivers 

      Joham, Michael; Gründinger, Andreas; Pastore, Adriano; Rodríguez Fonollosa, Javier; Utschick, Wolfgang (2013)
      Conference report
      Restricted access - publisher's policy
      For the vector broadcast channel (BC), the case of erroneous channel state information (CSI) at the receiver is considered. Employing a well established lower bound for the mutual information with Gaussian signaling, a ...
    • Receptor superheterodi d'ONA mitjana modular 

      Ortiz Macià, Joan (Universitat Politècnica de Catalunya, 2013)
      Master thesis (pre-Bologna period)
      Open Access
      L’objectiu principal d’aquest projecte final de carrera es l’estudi i la construcció hardware de tots els blocs que formen un receptor de radio superheterodí d’ona mitjana (AM), alguns d’aquests blocs han sigut dissenyats ...
    • Signal and noise power spectra in superregenerative oscillators 

      Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents a method to quantify noise in superregenerative oscillators. A frequency domain technique, originally intended to determine the signal response, can also be used to determine the noise response. This ...
    • Simplified polarization diversity heterodyne receiver for 1.25Gb/s cost-effective udWDM-PON 

      Cano Valadéz, Iván Nicolás; Lerín de la Santísima Trinidad, Adolfo; Polo Querol, Víctor; Prat Gomà, Josep Joan (2014)
      Conference report
      Restricted access - publisher's policy
      We propose a heterodyne receiver with a single-photodiode per polarization for ONU receiver in low-cost udWDM-PON. This grants polarization diversity operation showing a penalty of 6dB in sensitivity compared to a balanced ...
    • Sistema de Test Funcional d'un receptor de Radiodifusió Encastat 

      Fatjó Brugueras, Arnau (Universitat Politècnica de Catalunya, 2008-06-10)
      Master thesis (pre-Bologna period)
      Open Access
      L’objectiu del present document és descriure la funcionalitat del sistema de test d’un receptor de radiodifusió. Aquest receptor té la mida estàndard dels interruptors de paret i és fabricat per a Hotels i empreses ...
    • Software radios: unifying the reconfiguration process over heterogeneous platforms 

      Revés Ballesté, Xavier; Gelonch Bosch, Antonio José; Majorevic, Vuk; Ferrús Ferré, Ramón Antonio (Hindawi Publishing Corporation, 2005)
      Article
      Open Access
      Future radio transceivers supporting the software radio concept will provide increased features for radio access networks. However, the reconfiguration of radio equipment requires the existence of architecture, a common ...
    • Space-dimension models of spectrum usage for cognitive radio networks 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2017-01-01)
      Article
      Open Access
      The dynamic spectrum access (DSA) principle, relying on the cognitive radio (CR) paradigm, allows users to access spectrum over time intervals or spatial areas where it remains unused. Due to the opportunistic nature of ...
    • Superregeneration revisited: from principles to current applications 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Moncunill Geniz, Francesc Xavier; Giralt Mas, Ma. Rosa (2020-02-01)
      Article
      Open Access
      Wireless communications play a central role in our modern connected lives; at the same time, they constitute a very broad and deep area of research. The elements that make wireless communications possible are a transmitter, ...
    • Ultra wideband impulse radio superregenerative reception 

      Moncunill Geniz, Francesc Xavier; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Giralt Mas, Ma. Rosa (Intech, 2011-07-31)
      Part of book or chapter of book
      Open Access