Exploració per tema "Digital modulation"

Ara es mostren els items 1-20 de 21

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

      Pérez Gumà, Daniel (Universitat Politècnica de Catalunya, 2010-03)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   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 vectorization of synchronization algorithms for OFDM systems 

      Pages Fageda, Carles (Universitat Politècnica de Catalunya, 2009-04-28)
      Projecte/Treball Final de Carrera
      Accés obert
      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 ...

    • 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)
      Projecte/Treball Final de Carrera
      Accés obert
      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 ...

    • Comunicaciones II : ejercicios resueltos 

      Cabrera-Bean, Margarita; Rodríguez Fonollosa, Javier; Fernández Rubio, Juan Antonio; Riba Sagarra, Jaume (Edicions UPC, 2005)
      Llibre
      Accés restringit a la comunitat UPC
      Este material constituye una recopilación de problemas de examen, resueltos por los profesores de la asignatura Comunicaciones 2, impartida en el segundo curso de los estudios de Ingeniería Técnica Superior de Telecomunicaciones ...

    • Design and implementation of a radio wake up reciber 

      Vila Bagaria, David (Universitat Politècnica de Catalunya, 2018-06)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      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)
      Comunicació de congrés
      Accés obert
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      [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)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Implementación de un transponder 64QAM en FPGA mediante Simulink 

      Alonso Varela, Marc (Universitat Politècnica de Catalunya, 2016-09)
      Treball Final de Grau
      Accés obert
      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 ...

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

      Garin Ureña, Ferran (Universitat Politècnica de Catalunya, 2015-10-30)
      Projecte/Treball Final de Carrera
      Accés obert
      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)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      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
      Accés obert
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   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)
      Treball Final de Grau
      Accés obert
      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 ...

    • 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 ...

    • Robust Tracking System in front of Radio-Frequency Interferences. Part 3: Signals, Modulations, and Reliability analysis 

      Gil Sorribes, Adrià (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      The aim of this project is to simulate and implement a Robust Tracking System (RTS), capable of tracking a transmitter when Global Position System (GPS) signals are not available, offering high resistance to Radio Frequency ...

    • Sistema de generació i recepció per a la mesura de senyals de RF amb modulacions i codificacions digitals 

      Vergés Pérez, Roger (Universitat Politècnica de Catalunya, 2019-06)
      Treball Final de Grau
      Accés obert
      The world of telecommunications is constantly growing and there is an increasing need of systems able to measure the response of new devices to digitally modulated signals. This project develops a remote control system to ...

    • 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 ...