Enviaments recents

  • 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)
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    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)
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    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)
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    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)
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    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)
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    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)
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    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 ...
  • Cellular internet service: advanced front-end for FDSS 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1999)
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  • A dynamic non-singleton fuzzy logic system for DS/CDMA communications 

    Pérez Neira, Ana Isabel; Sueiro, Jesús Cid; Roca, Josep; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1998)
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    We investigate a dynamic fuzzy logic system, specifically, its non-singleton generalization, and derive a novel adaptive fuzzy line enhancer that successfully solves the non-linear problem of narrowband interference (NBI) ...
  • Cross-coupled LMS for quadratic constrained filter design 

    Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    Quadratic constrained maximization appears as the central problem in many filter design methods and signal processing applications, whenever the processing or filtering entails the maximization of a signal to noise ratio. ...

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