Exploració per tema "Noise"

Ara es mostren els items 21-40 de 86

    • Comparison of different order cumulants in a speech enhancement system by adaptive Wiener filtering 

      Salavedra Molí, Josep; Masgrau Gómez, Enrique José; Moreno Bilbao, M. Asunción (IEEE Press, 1993)
      Text en actes de congrés
      Accés obert
      The authors study some speech enhancement algorithms based on the iterative Wiener filtering method due to Lim and Oppenheim (1978), where the AR spectral estimation of the speech is carried out using a second-order analysis. ...

    • Conditional maximum likelihood frequency estimation for staggered modulations 

      Riba Sagarra, Jaume; Vázquez Grau, Gregorio (1998)
      Text en actes de congrés
      Accés obert
      The use of spectrally efficient continuous phase modulations for mobile communications may lead to a serious performance degradation of the classical frequency error detectors (FEDs) due to the presence of self-noise. This ...

    • Correlated multiple antennas spectrum sensing under calibration uncertainty 

      Pourgharehkhan, Zahra; Taherpour, Abbas; Sala Álvarez, José; Khattab, Tamer (2015-12-01)
      Article
      Accés obert
      We address the problem of spectrum sensing in cognitive radios (CRs) when the secondary user (SU) is equipped with a multiantenna receiver. We consider scenarios with correlation between the received channels at different ...

    • ¿Cuánto estamos dispuestos a pagar por el silencio? Un análisis contingente para la ciudad de Barcelona 

      Marmolejo Duarte, Carlos Ramiro; Frizzera, Agustín (Centre de Política del Sòl i Valoracions - Universitat Politècnica de Catalunya, 2008)
      Article
      Accés obert
      El municipio de Barcelona posee un modelo de ciudad compacta caracterizado por una elevada densidad, en la que conviven diversas actividades económicas y residenciales, lo cual aunado a un diseño adecuado de los espacios ...

    • Denoising wavefront sensor image with deep neural networks 

      Pou Mulet, Bartomeu; Quiñones Moreno, Eduardo; Gratadour, Damien; Martín Muñoz, Mario (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Text en actes de congrés
      Accés obert
      A classical closed-loop adaptive optics system with a Shack-Hartmann wavefront sensor (WFS) relies on a center of gravity approach to process the WFS information and an integrator with gain to produce the commands to a ...

    • Design of a PMS for the West-North arrival configuration of the Barcelona Airport 

      Ceballos Sopena, Daniel (Universitat Politècnica de Catalunya, 2020-07-24)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      In this project a new arrival procedure for the West-North configuration of the Barcelona Airport has been designed with the main objective of reducing noise impact in populated areas. To do that, three different options ...

    • Differential susceptibility to noise of mixed Turing and Hopf modes in a photosensitive chemical medium 

      Alonso Muñoz, Sergio; Míguez, David G.; Sagués Mestres, Francesc (2007-12-31)
      Article
      Accés obert
      We report on experiments with the photosensitive chlorine dioxide-iodine-malonic acid reaction (CDIMA) when forced with a random (spatiotemporally) distributed illumination. Acting on a mixed mode consisting of oscillating ...

    • Diseño de un prototipo de auriculares con cancelación activa de sonido 

      Duat Barral, Jordi (Universitat Politècnica de Catalunya, 2015-10-28)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat

    • Diseño e implementación de un sistema de deep learning para la detección de covid por la tos con aumento de datos 

      Marchan Del Pino, David (Universitat Politècnica de Catalunya, 2022-05-23)
      Treball Final de Grau
      Accés obert
      In recent years, COVID-19 has had a major impact on today's society and has not gone unnoticed in the world of deep learning. Cases can now be studied using image analysis or in the world of audio analysis. This report ...

    • Disseny, simulació i verificació d'un circuit integrat per a la mesura de soroll a la xarxa d'alimentació interna 

      Yzaguirre I Hueso, Oriol de (Universitat Politècnica de Catalunya, 2015-05-11)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] The constant reduction of the size of transistors along the last decades, and the consequent increase in the density of ICs (Integrated Circuits) has revealed a number of previously unknown problems. To overcome ...

    • Distribution of residence times of time-delayed bistable systems driven by noise 

      Masoller Alonso, Cristina (2003-01-17)
      Article
      Accés obert
      I study bistable time-delayed feedback systems driven by noise. Based on a two-state model with transition rates depending on the earlier state of the system I calculate analytically the residence-time distribution function. ...

    • Dynamic representation of excitation sources on construction-induced vibration problems based on multiple harmonic loads applied on the ground 

      Arcos Villamarín, Robert; Clot Razquin, Arnau; Romeu Garbí, Jordi (2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Construction machinery used in public works is a source of noise and vibration that generate annoyance to the surrounding residential buildings. Thus, prediction of noise and vibration levels that will be induced by these ...

    • Estudi de vibracións i freqüències modals en estators de motors 

      De Angulo Miralles, Adrià (Universitat Politècnica de Catalunya, 2021-02-01)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Les vibracions i el soroll produïts per motors i diferents tipus de màquines són un tema d'investigació força freqüent. Normalment, en motors elèctrics s’estudia el soroll d’origen electromagnètic, però hi ha altres fonts ...

    • Estudio de las fuentes de ruido en maquinaria industrial 

      Tirado Galbany, Manel (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   AUSA
      This project is the first attempt to achieve a noise reduction in earth moving machinery dumper class. In the first paragraphs you can find about de acoustics in general and all the physics that it involves. Then, before ...

    • Evaluating temporal correlations in time series using permutation entropy, ordinal probabilities and machine learning 

      Boaretto, Bruno R.; Budzinski, Roberto C.; Rossi, Kalel L.; Prado, Thiago L.; Lopes, Sergio R.; Masoller Alonso, Cristina (2021-08)
      Article
      Accés obert
      Time series analysis comprises a wide repertoire of methods for extracting information from data sets. Despite great advances in time series analysis, identifying and quantifying the strength of nonlinear temporal correlations ...

    • Evolution in the law of transport noise in England 

      Simona Pujadó, Josep; Vallbé Mumbrú, Marc; Rossell Garriga, Josep Maria; Sanchez Roemmele, Xavier (2021-09-27)
      Article
      Accés obert

    • Experimental investigation of a bistable system in the presence of noise and delay 

      Houlihan, J.; Goulding, D.; Busch, T.; Masoller Alonso, Cristina; Huyet, G. (2004-02-06)
      Article
      Accés obert
      We experimentally analyze the behavior of a non-Markovian bistable system with noise, using a vertical cavity surface emitting laser with time-delayed optoelectronic feedback. The effects of the delayed feedback are observed ...

    • Filtrado transversal adaptativo de varianza constante para la ecualización de canal 

      Vázquez Grau, Gregorio; Gasull Llampallas, Antoni; Sánchez Umbría, Juan; Oliveras Vergés, Albert (1989)
      Text en actes de congrés
      Accés obert
      This paper describes the problem of lineal filtering of noisy data under a Maximum Likelihood objective. In this sense, the paper shows that a weighted square error cost function deals and it is necessary to weight the ...

    • Frequency-domain GLR detection of a second-order cyclostationary signal over fading channels 

      Riba Sagarra, Jaume; Font Segura, Josep; Villares Piera, Nemesio Javier; Vázquez Grau, Gregorio (2014-04-01)
      Article
      Accés obert
      Cyclostationary processes exhibit a form of frequency diversity. Based on that, we show that a digital waveform with symbol period T can be asymptotically represented as a rank-1 frequency-domain vector process which ...

    • Generació procedural d'arbres 

      Sánchez Herranz, Guillem (Universitat Politècnica de Catalunya, 2022-07-11)
      Treball Final de Grau
      Accés obert
      Aquest projecte tracta de la creació d'una eina per a dissenyadors i desenvolupadors de videojocs la qual podran fer servir per generar i modificar models d’arbres en funció dels paràmetres ambientals per a poder tenir ...