Now showing items 1-10 of 10

    • A study of flexible bandwidth allocation in statistical OFDM-based PON 

      Cano Valadéz, Iván Nicolás; Escayola Elias, Francisco Javier; Peralta Gallardo, Ángel; Polo Querol, Víctor; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      The upstream of an OFDM-PON with direct modulated lasers tuned in temperature was experimentally tested. Results demonstrate flexible bandwidth allocation, and show it constitutes an efficient strategy to cope with the ...
    • An OFDMA-PON with non-preselected independent ONU sources and centralized feedback wavelength control: Dimensioning and experimental results 

      Cano Valadéz, Iván Nicolás; Santos Blanco, M. Concepción; Escayola Elias, Francisco Javier; Polo Querol, Víctor; Giacoumidis, E.; Kachris, C.; Tomkos, Ioannis; Prat Gomà, Josep Joan (IEEE, 2012)
      Conference report
      Restricted access - publisher's policy
      A simple and low cost method for wavelength control based on centralized OLT monitoring and feedback of economical random non-preselected independent ONU sources is presented. The technique was dimensioned and experimentally ...
    • Differential link-loss compensation through dynamic bandwidth assignment in statistical OFDMA-PON 

      Cano Valadéz, Iván Nicolás; Peralta Gallardo, Ángel; Polo Querol, Víctor; Escayola Elias, Francisco Javier; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan (2013)
      Conference report
      Restricted access - publisher's policy
      Flexible bandwidth allocation strategies in a statistical OFDM-PON are experimentally shown to compensate for differential link loss allowing for proper detection of ONUs separated up to 55km (11.4dB)
    • Estudio y medidas preliminares para el diseño de un filtro combline en banda c 

      Escayola Elias, Francisco Javier (Universitat Politècnica de Catalunya, 2009-01-26)
      Master thesis (pre-Bologna period)
      Open Access
      En este trabajo se realiza un amplio estudio de cavidades resonantes coaxiales con el objetivo de un futuro diseño de filtros combline con pérdidas. Con esta finalidad, el primer capítulo hace una breve introducción ...
    • Experimental demonstration of a statistical OFDM-PON with multiband ONUs and elastic bandwidth allocation 

      Cano Valadéz, Iván Nicolás; Escayola Elias, Francisco Javier; Schindler, Philipp C.; Santos Blanco, M. Concepción; Polo Querol, Víctor; Leuthold, Juerg; Tomkos, Ioannis; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2015-01-01)
      Article
      Open Access
      The statistical orthogonal frequency division multiplexing passive optical network (OFDM-PON) concept with multiband optical network units (ONUs) is experimentally tested with two users and an optical line terminal at 2.5/5 ...
    • Experimental demonstration of multi-band upstream in statistical OFDM-PONs and comparison with digital subcarrier assignment 

      Cano Valadéz, Iván Nicolás; Escayola Elias, Francisco Javier; Schindler, Philipp C.; Santos Blanco, M. Concepción; Polo Querol, Víctor; Leuthold, Juerg; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      A multiband subcarrier allocation scheme is demonstrated for the uplink in a statistical OFDM-PON. Performance achieved is similar to digital subcarrier allocation, with the significant advantage of a lower transmitter complexity.
    • Laser linewidth requirements for remote heterodyne OFDM based PON scenario 

      Escayola Elias, Francisco Javier; Cano Valadéz, Iván Nicolás; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan (IEEE Press and Wiley, 2004)
      Conference report
      Restricted access - publisher's policy
      The relationship between the FFT size, modulation format and laser linewidth is studied in a remote heterodyne scenario where phase noise is compensated by pilot tones. Results indicate that the laser linewidth tolerance ...
    • Next generation passive optical networks based on orthogonal frequency division multiplexing techniques 

      Escayola Elias, Francisco Javier (Universitat Politècnica de Catalunya, 2015-12-11)
      Doctoral thesis
      Open Access
      In recent decades, the industry of communications has acquired huge significance, and nowadays constitutes an essential tool for the society information. Thus, the exponential growth in demand of broadband services and ...
    • OFDM-PON performance with limited quantization 

      Escayola Elias, Francisco Javier; Cano Valadéz, Iván Nicolás; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      A study of digital-analogue converter quantization effects and the minimum resolution required in an OFDMA-PON is carried out with 10 Gbps transceivers. The PON is based on DD over a maximum of 100 km fibre length. Results ...
    • Quality analysis of audio signals using binaural cue coding 

      Escayola Elias, Francisco Javier (Universitat Politècnica de Catalunya, 2011-02-23)
      Master thesis
      Restricted access - author's decision
      Nowadays, one of the most important objectives in the study of digital processing of audio signals is to nd an algorithm that allows encoding and decoding the signal by obtaining the highest quality so it can be sent ...