Ara es mostren els items 13-25 de 25

    • PROGRAMACIÓ DE BAIX NIVELL 

      Vila Marta, Sebastià; Águila López, Francisco del (Universitat Politècnica de Catalunya, 2021-06-21)
      Examen
      Accés restringit per decisió de l'autor
    • A proof-of-concept superregenerative QPSK transceiver 

      López Riera, Alexis; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2014)
      Comunicació de congrés
      Accés obert
      In this paper we present a description and experimental verification of an HF-band proof-of-concept superregenerative transceiver for QPSK signals. We describe a simple implementation of an all-digital, FPGA-based, QPSK ...
    • 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)
      Comunicació de congrés
      Accés obert
      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 ...
    • Steady state analysis of Chua's circuit with RLCG transmission line 

      Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Águila López, Francisco del (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      In this paper we present a new technique to compute the steady state response of nonlinear autonomous circuits with RLCG transmission lines. Using multipoint Pade approximants, instead of the commonly used expansions around ...
    • Steady state analysis of class-E amplifier with non-linear capacitor by means of discrete-time techniques 

      Águila López, Francisco del; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Giralt Mas, Ma. Rosa (The Institute of Electrical and Electronics Engineers, 2000)
      Text en actes de congrés
      Accés obert
      A new method to determine the steady state response of switched nonlinear circuits is proposed. The method is based on a Gear discretization of the circuit equations. Additional samples of the waveform are used to describe ...
    • Sub-nanosecond pulse filtering and amplification through firts-order controlled circuit instability 

      Moncunill Geniz, Francesc Xavier; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2009)
      Comunicació de congrés
      Accés obert
      In this paper we investigate how to use controlled circuit instability in the filtering and amplification of narrow pulses. The basic circuit consists of a first-order RC network coupled to a negative resistance controlled ...
    • Super-regenerative receiver for OFDM communication 

      Moncunill Geniz, Francesc Xavier; Bonet Dalmau, Jordi; Águila López, Francisco del; Demirkol, Ilker Seyfettin; Palà Schönwälder, Pere (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés obert
      In this paper, we demonstrate the suitability of the super-regenerative receiver in OFDM communication. The wellknown property of super-regenerative oscillators to preserve the amplitude and phase information is exploited ...
    • Super-regenerative receiver wake-up radio solution for 5G New Radio communications 

      Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Demirkol, Ilker Seyfettin; Bonet Dalmau, Jordi; Palà Schönwälder, Pere (2023-12-14)
      Article
      Accés obert
      Wake-up radio is a promising solution to reduce the energy wasted by mobile devices during an idle state. In this paper, we propose a new wake-up radio solution for 5G mobile devices based on a super-regenerative receiver ...
    • 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
      Accés obert
      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, ...
    • A superregenerative QPSK receiver 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2014-01)
      Article
      Accés obert
      In this paper we present a description and experimental verification of a superregenerative receiver (SR) for QPSK signals. Exploiting the fact that a conventional SR generates pulses which preserve the input phase ...
    • Superregenerative reception of narrowband FSK modulations 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; López Riera, Alexis; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2015-03-01)
      Article
      Accés obert
      In this paper we investigate the possibilities of narrowband FSK detection using a superregenerative (SR) receiver. Previous SR FM demodulation techniques rely on detecting the amplitude variations caused by the different ...
    • The nonlinear class-E amplifier: a case study of harmonic balance applied to switched circuits 

      Bonet Dalmau, Jordi; Águila López, Francisco del; Moncunill Geniz, Francesc Xavier; Palà Schönwälder, Pere (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
      Text en actes de congrés
      Accés obert
      Nonlinear switched circuits are usually analyzed in the time domain. The use of frequency-domain methods to analyze the steady-state of switched circuits is usually restricted to linear circuits and, although Volterra ...
    • 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)
      Capítol de llibre
      Accés obert