Exploració per tema "Correlation methods"

Ara es mostren els items 1-19 de 19

    • A new approach to texture coding using stochastic vector quantization 

      Gimeno, D; Torres Urgell, Lluís; Casas Pla, Josep Ramon (IEEE Computer Society, 1994)
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      A new method for texture coding which combines 2-D linear prediction and stochastic vector quantization is presented in this paper. To encode a texture, a linear predictor is computed first. Next, a codebook following the ...

    • A performance lower bound for quadratic timing recovery accounting for the symbol transition density 

      Riba Sagarra, Jaume (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-11-30)
      Article
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      The symbol transition density in a digitally modulated signal affects the performance of practical synchronization schemes designed for timing recovery. This paper focuses on the derivation of simple performance limits for ...

    • Estimation of the modulation index of cpm signals using hos 

      Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián (Institute of Electrical and Electronics Engineers (IEEE), 1993)
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      Three simple methods are proposed for the estimation of the modulation index of continuous phase modulated signals in noise. These methods employ the estimated autocorrelation and fourth-order cumulant sequences of the ...

    • Flexible capacity and traffic management for hybrid satellite-terrestrial mobile backhauling networks 

      Mendoza, Fabián; Ferrús Ferré, Ramón Antonio; Sallent Roig, Oriol (2016)
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      The unique wide-scale geographical coverage offered by satellite networks, coupled with its inherent broadcast/multicast capabilities and highly reliable connectivity, anticipates new opportunities for the integration of ...

    • High level spectral-based análisis of power concumption in DSP's systems 

      Calomarde Palomino, Antonio; Mateo Peña, Diego; Rubio Sola, Jose Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
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      In this paper, an efficient technique to evaluate temporal correlation and transition activity at high level in DSP systems is presented. The method is based on the spectral distribution of signals and has the advantage ...

    • Identification of Obstructive Sleep Apnea patients from tracheal breath sound analysis during wakefulness in polysomnographic studies 

      Solà Soler, Jordi; Fiz Fernández, José Antonio; Torres Cebrián, Abel; Jané Campos, Raimon (2014)
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      Obstructive Sleep Apnea (OSA) is currently diagnosed by a full nocturnal polysomnography (PSG), a very expensive and time-consuming method. In previous studies we were able to distinguish patients with OSA through formant ...

    • Joint direction of arrival and array shape tracking for multiple moving targets 

      Goldberg, Jason Matthew; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1997)
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      An algorithm for the joint tracking of source DOAs and sensor positions is presented to address the problem of DOA tracking in the presence sensor motion. Initial maximum likelihood estimates of source DOAs and sensor ...

    • Linear prediction of the one-sided autocorrelation sequence for noisy speech recognition 

      Hernando Pericás, Francisco Javier; Nadeu Camprubí, Climent (1997-01)
      Article
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      The article presents a robust representation of speech based on AR modeling of the causal part of the autocorrelation sequence. In noisy speech recognition, this new representation achieves better results than several other ...

    • Maximum flatness spectral modeling 

      Nadeu Camprubí, Climent (1990-11)
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    • NDA waveform estimation in the low-SNR regime 

      López Salcedo, José Antonio; Vázquez Grau, Gregorio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERING INC, 2007-12)
      Article
      Accés obert
      This correspondence addresses the problem of nondata-aided waveform estimation for digital communications. Based on the unconditional maximum likelihood criterion, the main contribution of this correspondence is the ...

    • New hos-based parameter estimation methods for speech recognition in noisy environments 

      Moreno Bilbao, M. Asunción; Tortola, S; Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (. S.N., 1995)
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      The problem of recognition in noisy environments is addressed. Often, a recognition system is used in a noisy environment and there is no possibility of training it with noisy samples. Classical speech analysis techniques ...

    • Pitch determination using the cepstrum of the one-sided autocorrelation sequence 

      Nadeu Camprubí, Climent; Pascual Gilabert, Jordi; Hernando Pericás, Francisco Javier (1991)
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      A novel cepstral function, the cepstrum (CEP) of the one-sided autocorrelation sequence (COSA), is presented and applied to pitch determination of speech signals. This pitch determination algorithm (PDA) starts from the ...

    • Robust data detection in asynchronous DS-CDMA in the presence of timing uncertainty 

      Riba Sagarra, Jaume; Goldberg, J; Vázquez Grau, Gregorio (IEEE, 1996)
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      The decorrelating and minimum mean squared error data detectors for direct sequence code division multiple access (DS-CDMA) communications systems are known to exhibit low vulnerability to the near-far problem. Nevertheless, ...

    • Simulated leakage power analysis attack of the trivium stream cipher 

      Palma Carmona, Kenneth; Moll Echeto, Francisco de Borja (Institute of Electrical and Electronics Engineers (IEEE), 2022)
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      In this paper, the theoretical basis for power analysis attacks on the Trivium utilizing leakage current as a side-channel are presented. The analysis is first established in the case of an ideal implementation without the ...

    • Speech recognition in noisy car environment based on OSALPC representation and robust similarity measuring techniques 

      Hernando Pericás, Francisco Javier; Nadeu Camprubí, Climent (1994)
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      The performance of the existing speech recognition systems degrades rapidly in the presence of background noise. The OSALPC (one-sided autocorrelation linear predictive coding) representation of the speech signal has shown ...

    • Statistical feature selection for isolated word recognition 

      Lleida Solano, Eduardo; Nadeu Camprubí, Climent; Monte Moreno, Enrique; Mariño Acebal, José Bernardo (1990)
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    • Time correlation of the intercell to intracell interference ratio in a W-CDMA network 

      Adelantado, Ferran; Sallent Roig, Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (Institution of Electrical Engineers, 2002-12)
      Article
      Accés restringit per política de l'editorial
      W-CDMA performance is tightly coupled to the amount of interference in the air interface and eventually depends on many strongly interrelated system parameters that need to be suitably managed through radio resource ...

    • Transverse cross-correlation scheme for pulse shape measurement in random nonlinear crystals 

      Cojocaru, Crina; Wang, Bingxia; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      We present a novel single-shot cross-correlation scheme based on the measurement of the transverse second harmonic generation (TSHG) in crystals with randomly distributed nonlinear ferroelectric domains. We implement it ...

    • Two-stage code reference beamformer in mobile communications 

      Mestre Pons, Francesc X.; Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (1998)
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      This paper addresses a new architecture for blind adaptive beamforming when dealing with frequency hopping (FH) modulation in cellular mobile communications systems. The proposed code reference beamformer (CRB) takes ...