Browsing by Subject "Modulació digital"

Now showing items 1-20 of 27

    • 100 Gbit/s Transmission using Orthogonal Double Subcarrier Polarization Multiplexed QPSK 

      Pérez Gumà, Daniel (Universitat Politècnica de Catalunya, 2010-03)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Covenantee:   Danmarks tekniske universitet
      The present thesis has been devoted to the study of optical transmissions at 100 Gbps with coherently detected QPSK signals taking advantage of polarization multiplexing. Two di erent systems have been investigated: single ...

    • A case study on the communications subsystem for cubesat 

      Cebrián Herrera, Natalia (Universitat Politècnica de Catalunya, 2014-06-09)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Universidade de Fortaleza
      Due to the overwhelming increment transmission and reception of information around the world, Satellite Communications have become an essential application in our lives. Proof of this, are the continuous investments made ...

    • A vectorization of synchronization algorithms for OFDM systems 

      Pages Fageda, Carles (Universitat Politècnica de Catalunya, 2009-04-28)
      Master thesis (pre-Bologna period)
      Open Access
      L'objectiu d'aquest projecte és doble. Per una banda, es tracta de crear una llibreria en C++ que ens permeti simular implementacions d'algoritmes en DSP vectorials (que poden realitzar la mateixa operació sobre diverses ...

    • Aplicaciones avanzadas del principio superregenerativo a comunicaciones por radiofrecuencia 

      López Riera, Alexis (Universitat Politècnica de Catalunya, 2017-07-18)
      Doctoral thesis
      Open Access
      There exists today an increasing demand for wireless devices which require low cost and minimum power consumption radiofrequency front-ends. Precisely, these are two remarkable characteristics of the superregenerative ...

    • Comparison of the Achievable Rates in OFDM and Single Carrier modulations with I.I.D. Inputs 

      Adrover Martínez, Àngel (Universitat Politècnica de Catalunya, 2016-02-06)
      Master thesis (pre-Bologna period)
      Open Access
      Study based on the original article of the same name. Within concave / convex function of mutual information is studied, in order to apply the results on two different digital modulation techniques (Single-Carrier and ...

    • Contribución al diseño de GNSS-SDR, un receptor GNSS de código abierto 

      Esteve Elfau, Luis (Universitat Politècnica de Catalunya, 2013-07-11)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] This project introduces GNSS-SDR, an open source Global Navigation Satellite System software-defined receiver. The lack of reconfigurability of current commercial-of-the-shelf receivers and the advent of new ...

    • Design and implementation of a radio wake up reciber 

      Vila Bagaria, David (Universitat Politècnica de Catalunya, 2018-06)
      Bachelor thesis
      Restricted access - confidentiality agreement
      Wi-Fi is the facto standard protocol for most indoor personal communication devices. Despite this, its usage in IoT solutions is limited, mainly due to the high cost and elevated power consumption of Wi-Fi transceivers. ...

    • Design and performance comparison of a superregenerative MPSK transceiver 

      Bonet Dalmau, Jordi; López Riera, Alexis; Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier; Babí Oller, Albert (2015)
      Conference lecture
      Open Access
      In this paper we present a superregenerative transceiver able to switch among BPSK, QPSK and 8PSK modulations. An HF-band proof-of-concept transceiver is implemented on an FPGA with a minimum of analog circuitry. The ...

    • Disseny d'un sistema de control amb FPGA per actuadors piezoelèctrics 

      Gumara i Ferret, Ramon (Universitat Politècnica de Catalunya, 2009-10)
      Master thesis (pre-Bologna period)
      Open Access
      En aquest projecte s’expliquen quines són les propietats de l’efecte piezoelèctric i quines són les seves aplicacions en l’actualitat. Amb aquesta base es parteix a examinar de quines maneres es pot realitzar el control ...

    • Disseny i implementació d'un transceptor super-regeneratiu QPSK 

      López Riera, Alexis (Universitat Politècnica de Catalunya, 2013-07-05)
      Master thesis
      Open Access
      [ANGLÈS] This project consists on the design and the implementation of a radio frequency transceiver. A transceiver is a device which is able to be a transmitter and a receiver and, therefore, it is suitable for commuting ...

    • Evaluation of indoor VLC positioning 

      Mas I Méndez, Mireia (Universitat Politècnica de Catalunya, 2019-08)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • Implementación de un transponder 64QAM en FPGA mediante Simulink 

      Alonso Varela, Marc (Universitat Politècnica de Catalunya, 2016-09)
      Bachelor thesis
      Open Access
      The current evolution of communication systems has been driven by the high demand of resources that are needed to satisfy services which are dependent of the network. To contain the high requirements of current and emerging ...

    • Implementation of a GFDM scheme for a high mobility scenario on a 5G simulator including parameter optimization 

      Heinrich Mas, Guillem (Universitat Politècnica de Catalunya, 2017-09-06)
      Bachelor thesis
      Open Access
      Covenantee:   Technische Universität Wien
      The fifth generation of mobiles communications (5G) requires a variety of applications that the fourth generation (4G) cannot achieve, such as a higher data rate, ultra-low power consumption and short response times. In ...

    • Investigación de la tolerancia al crosstalk de los sistemas OFDM ópticos 

      Garin Ureña, Ferran (Universitat Politècnica de Catalunya, 2015-10-30)
      Master thesis (pre-Bologna period)
      Open Access
      This project aims to investigate the impact of crosstalk in optical OFDM modulation under ideal conditions, i.e. without losses, phase noise or nonlinear effects. In order to get it we will analyze deeply how the OFDM works ...

    • Investigation on Nyquist Modulation for Fiber-Optic Communications 

      Casal Rodríguez, Jonathan (Universitat Politècnica de Catalunya, 2015-07)
      Bachelor thesis
      Restricted access - author's decision
      In a society where the need for communication is increasing every day, an improvement in spectral efficiency and faster data transmission methods are needed. This thesis analyses a new modulation, the Nyquist modulation, ...

    • Joint symbol and chip synchronization for a burst-mode-communication superregenerative MSK receiver 

      López Riera, Alexis; Águila López, Francisco del; Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Giralt Mas, Ma. Rosa; Moncunill Geniz, Francesc Xavier (2017-01-05)
      Article
      Open Access
      In this paper we describe a superregenerative (SR) MSK receiver able to operate in a burst-mode framework where synchronization is required for each packet. The receiver is based on an SR oscillator which provides samples ...

    • MIMO-OFDM: Channel Shortening 

      Segarra López, Guillem (Universitat Politècnica de Catalunya / Beijing Institute of Technology, 2013-07-31)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Beijing gong ye xue yuan
      [ANGLÈS] The study begins with the Multi-carrier modulation, to study the behavior OFDM with MIMO. Ends with an extensive study of the different methods used to implement the technique known as Channel Shortening.

    • Modelado de circuitos de audio analógicos para plug-ins VST, AU 

      Murys, Alexandre Thierry (Universitat Politècnica de Catalunya, 2022-07-20)
      Bachelor thesis
      Open Access
      Modelado no lineal de circuitos analógicos de efectos de audio, para ser utilizados a tiempo real como sustituto de dispositivos físicos tales como amplificadores y pedales de efectos. Implementando DK method para ...

    • Opportunistic communications using software defined radio 

      Pérez Portero, Adrián (Universitat Politècnica de Catalunya, 2017-01-26)
      Bachelor thesis
      Open Access
      The increasing scarcity in the available spectrum is limiting the growth of high bandwidth applications. By exploiting licensed channels when they are unused, Opportunistic Communications aim to use the spectrum in a more ...

    • 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)
      Conference lecture
      Open Access
      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 ...