Enviaments recents

  • An adaptative fuzzy logic enhancer for rejection of narrowband interference in DS-Spread Spectrum 

    Pérez Neira, Ana Isabel; Antón Haro, Carles; Lagunas Hernandez, Miguel A. (1998)
    Text en actes de congrés
    Accés obert
    This work develops a novel adaptive fuzzy line enhancer that, based on a fuzzy basis function expansion, successfully solves the non-linear problem of narrowband interference estimation and rejection in direct sequence-spread ...
  • Array covariance error measurement in adaptive parameter estimation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (. WORKSHOP ON ADAPTIVE ALGORITHMS IN COMMUNICATIONS, 1992)
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    Accés obert
    The small error approximation is used to derive a linear relationship between the source parameters (i.e. power levels and directions of arrival) and a measurement of the covariance error matrix, defined as the difference ...
  • Array covariance error measurement in adaptive source parameter estimation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1992)
    Text en actes de congrés
    Accés obert
    The small error approximation is used to derive a linear relationship between the source parameters (i.e. power levels and directions of arrival) and a measurement of the covariance error matrix, defined as the difference ...
  • Source separation based on coupled single DOA estimation processors 

    Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 1993)
    Text en actes de congrés
    Accés obert
    The separation of sources from an array of sensors is addressed. Based on Kolmogorov's theorem, an adaptive algorithm is proposed to separate simultaneously all the unknown impinging sources on an aperture of sensors. This ...
  • Simultaneous DOA estimation based on Kolmogorov's theorem 

    Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1993)
    Text en actes de congrés
    Accés obert
    The design of a new architecture for signal processing, based on the Kolmogorov's theorem (1957), is addressed. This architecture is applied to solve the problem of source separation. Particularly, an adaptive algorithm ...
  • Blind wideband source separation 

    Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A.; Bonet, I (1994)
    Text en actes de congrés
    Accés obert
    This paper deals with the general problem of separating two independent wideband sources when they are mixed by unknown filters. In order to solve this problem, a backward framework is proposed which is composed of two ...
  • Multiuser array beamforming based on a neural network mapping 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1994)
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    This paper addresses the problem of simultaneous multiuser service. To find a feasible solution to the collision problem, two time reference multibeamformer systems are developed (BPSK TRMB and frequency framing TRMB). ...
  • Simultaneous multiuser demodulation based on digital array processing 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1994)
    Text en actes de congrés
    Accés obert
    The use of antenna arrays to increase the efficiency of a communication link is studied. This work addresses a technique to solve the collision problem that takes place when various users ask simultaneously for access. It ...
  • Array covariance error measurement in adaptive source estimation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1994)
    Text en actes de congrés
    Accés obert
    The small error approximation is used to derive a linear relationship between the source parameters (i.e. power levels and directions of arrival) and a measurement of the covariance error matrix, defined as the difference ...
  • Estimación recursiva simultánea de potencia y DOA por ajuste de la matriz de covarianza asociada a la apertura 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1992)
    Text en actes de congrés
    Accés obert
    The small error approximation is used to derive a linear relationship between the source parameters (i.e. power levels and directions of arrival or DOA's) and a measurement of the covariance error matrix, defined as the ...

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