Now showing items 1-20 of 398

    • 3D joint speaker position and orientation tracking with particle filters 

      Segura, Carlos; Hernando Pericás, Francisco Javier (2014-01-29)
      Article
      Open Access
      This paper addresses the problem of three-dimensional speaker orientation estimation in a smart-room environment equipped with microphone arrays. A Bayesian approach is proposed to jointly track the location and orientation ...
    • 3D point cloud segmentation using a fully connected conditional random field 

      Lin, Xiao; Casas Pla, Josep Ramon; Pardàs Feliu, Montse (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Restricted access - publisher's policy
      Traditional image segmentation methods working with low level image features are usually difficult to adapt to higher level tasks, such as object recognition and scene understanding. Object segmentation emerges as a new ...
    • A bit more on the ability of adaptation of speech signals 

      Ballesteros, Dora Maria; Moreno Aróstegui, Juan Manuel (2013-03)
      Article
      Open Access
      Some traditional digital signal processing techniques encompass enhancement, filtering, coding, compression, detection and recognition. Recently, it has been presented a new hypothesis of signal processing known as the ...
    • A block adaptive pyramid coding system 

      Sallent Ribes, Sebastián; Torres Urgell, Lluís; Triola Espigulé, Albert (1988)
      Conference report
      Open Access
      In this paper we present a new block adaptive coding scheme which uses non-rectangular Laplacian Pyramid Algorithms. The proposed method JB adapted to the local image contents. The original image is broken into subimages ...
    • A contactless capacitive angular-position sensor 

      Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M.; Van der Ham, Lucas; Spronck, Jo W. (Institute of Electrical and Electronics Engineers, 2003-10)
      Article
      Open Access
      This paper presents an absolute capacitive angular-position sensor with a contactless rotor. The sensor is mainly composed of three parts: the capacitive sensing element, a signal processor, and a microcontroller. The ...
    • A continuously adaptive vector predictive coder (AVPC) for speech encoding 

      Masgrau Gómez, Enrique José; Mariño Acebal, José Bernardo; Vallverdú Bayés, Sisco (Institute of Electrical and Electronics Engineers (IEEE), 1986)
      Conference report
      Open Access
      In this work we present a waveform speech coding system including vector quantization. This system can be seen as a vector version of the scalar ADPCM speech coder. In such system the speech samples are grouped in vectors ...
    • A general adaptive algorithm for nonGaussian source separation without any constraint 

      Lagunas Hernandez, Miguel A. (1994)
      Conference report
      Open Access
      This paper deals with the blind source separation. The task consists in separating some independent and linearly mixed signals called sources. After some general remarks, the model is recalled and our approach based on the ...
    • A linear transform for spectral estimation 

      Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Carol Vilanova, Antonio (1981-10)
      Article
      Open Access
    • A machine learning methodology for the selection and classification of spontaneous spinal cord dorsum potentials allows disclosure of structured (non-random) changes in neuronal connectivity induced by nociceptive stimulation 

      Martín Muñoz, Mario; Contreras-Hernández, Enrique; Béjar Alonso, Javier; Espósito, Gennaro; Chávez, Diógenes; Glusman, Silvio; Cortés García, Claudio Ulises; Rudomín, Pablo (2015-08-26)
      Article
      Open Access
    • A new approach to exploit channel power imbalance in distributed antenna systems with fiber fronthaul 

      Dowhuszko, Alexis; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      Cloud Modulation (CM) is a novel transmission method that mitigates the non-linear impairments introduced by the Radio-over-Fiber (RoF) links of a distributed antenna system. In CM, constant-envelope phase-modulated radio ...
    • A new method for the acquisition of arterial pulse wave using self-mixing interferometry 

      Arasanz Tena, Andrés; Azcona Guerrero, Francisco Javier; Royo Royo, Santiago; Jha, Ajit; Pladellorens Mallofré, Josep (2014-11-01)
      Article
      Open Access
      In this paper we present a technique based on self-mixing interferometry as a method for the acquisition and reconstruction of the arterial pulse wave. A modification of the classic fringe counting reconstruction algorithm ...
    • A new non-linear system for estimating and suppressing narrowband interference in PN spread spectrum modulation 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1998)
      Conference report
      Open Access
      This work develops a novel dynamic fuzzy logic system that, based on a fuzzy basis function expansion, successfully solves the non-linear problem of narrowband interference prediction and rejection in DS-SS. A fuzzy basis ...
    • A non-data-aided SNR estimation technique for multilevel modulations exploiting signal cyclostationarity 

      Riba Sagarra, Jaume; Villares Piera, Nemesio Javier; Vázquez Grau, Gregorio (2010-11-01)
      Article
      Restricted access - publisher's policy
      Signal-to-noise ratio (SNR) estimators of linear modulation schemes usually operate at one sample per symbol at the matched filter output. In this paper we propose a new method for estimating the SNR in the complex ...
    • A non-rectangular pyramid coding system 

      Sallent Ribes, Sebastián; Torres Urgell, Lluís (1988)
      Conference report
      Open Access
      Rectangular sampling lattices bave been extensively applied to image coding. Sampling is a fundamental orera.tion m image coding systems as a proper selection of the sampling lattice minimizes the physica support of the ...
    • A nondata-aided SNR estimation technique for multilevel modulations exploiting signal cyclostationarity 

      Riba Sagarra, Jaume; Villares Piera, Nemesio Javier; Vázquez Grau, Gregorio (2010-11-01)
      Article
      Open Access
      Signal-to-noise ratio (SNR) estimators of linear modulation schemes usually operate at one sample per symbol at the matched filter output. In this paper we propose a new method for estimating the SNR in the complex additive ...
    • A novel formulation of independence detection based on the sample characteristic function 

      Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference lecture
      Open Access
      A novel independence test for continuous random sequences is proposed in this paper. The test is based on seeking for coherence in a particular fixed-dimension feature space based on a uniform sampling of the sample ...
    • A novel linear feature detector for SAR images 

      He, Chu; Liao, Z.X.; Yang, Fang; Deng, Xinping; Liao, M.S. (2012-11-12)
      Article
      Open Access
      A new linear feature detector for synthetic aperture radar (SAR) images is presented in this article by embedding a three-region filter into the wedgelet analysis framework. One of its main features is that it can detect ...
    • A proof of de Bruijn identity based on generalized Price’s theorem 

      Riba Sagarra, Jaume; Cabrera Estanyol, Ferran de (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      This paper shows that de Bruijn identity, which relates entropy with Fisher information, can be obtained as a particular case of an immediate generalization of Price’s theorem, which is a tool used in the analysis of ...
    • A pulsed carrier recovery using a discrete conception of the PLL 

      Aguasca Solé, Alberto; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1992)
      Conference report
      Open Access
      A bistatic radar system requires accurate synchronization between the transmitter and the remote receiver in order to achieve a correct coherent target detection and positioning. An unlinked receiver carrier phase/frequency ...
    • A recursive SVD algorithm for array signal processing 

      Duarte Ortigueira, Manuel; Lagunas Hernandez, Miguel A. (Elsevier, 1990)
      Conference report
      Open Access