Exploració per tema "Higher order statistics"

Ara es mostren els items 1-10 de 10

    • Adaptive blind equalization using weighted cumulant slices 

      Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Text en actes de congrés
      Accés obert
      Many linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ...

    • Higher order statistics for texture analysis and physical interpretation of polarimetric SAR data 

      Deng, Xinping; López Martínez, Carlos (2016-07-01)
      Article
      Accés obert
      The logarithmic cumulants (log-cumulants for short) of the second and third orders are widely used in the statistical analysis of polarimetric synthetic aperture radar (PolSAR) data. However, both the product model and the ...

    • Impulse response recovery of linear systems through weighted cumulant slice 

      Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-10-01)
      Article
      Accés obert
      Identifiability of the so-called ω-slice algorithm is proven for ARMA linear systems. Although proofs were developed in the past for the simpler cases of MA and AR models, they were not extendible to general exponential ...

    • Motion estimation using higher-order statistics 

      Sayrol Clols, Elisa; Gasull Llampallas, Antoni; Rodríguez Fonollosa, Javier (1996-06)
      Article
      Accés obert
      The objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics is ...

    • Motion estimation using higher-order statistics 

      Sayrol Clols, Elisa; Gasull Llampallas, Antoni; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-06-30)
      Article
      Accés obert
      The objective of this paper is to introduce a fourth-order cost function of the displaced frame difference (DFD) capable of estimating motion even for small regions or blocks. Using higher than second-order statistics ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Performance of blind equalization with higher order statistics in indoor radio environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...

    • Performance of Blind Equalization with Higher Order Statistics in Indoor Radio Environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...

    • Robust coefficients of a higher order AR modelling in a speech enhancement system using parameterized Wiener filtering 

      Salavedra Molí, Josep; Masgrau Gómez, Enrique José; Moreno Bilbao, M. Asunción; Estarellas, J; Jove, X (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Text en actes de congrés
      Accés obert
      We study some speech enhancement algorithms based on the iterative Wiener filtering method due to Lim-Oppenheim (1978), where the AR spectral estimation of the speech is carried out using a second-order analysis. But in ...

    • Sample cumulants of stationary processes: asymptotic results 

      Rodríguez Fonollosa, José Adrián (1995-04)
      Article
      Accés obert
      In this paper, we present the formulas of the covariances of the second-, third-, and fourth-order sample cumulants of stationary processes. These expressions are then used to obtain the analytic performance of FIR system ...