Enviaments recents

  • Blind beamforming for DS-CDMA systems 

    Pérez Palomar, Daniel; Lagunas Hernandez, Miguel A. (Servicio de Publicaciones Universidad de Vigo, 1999)
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    Code Division Multiple Access (CDMA) has been proposed as an efficient access method for cellular and personal communication systems outperforming the classical FDMA and TDMA techniques. But, in contrast to them, CDMA ...
  • Fuzzy techniques for robust localization & tracking 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Bas, J (GRETSI SERVICE, 1997)
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    This work addresses the problem of spatial reference estimation in mobile scenarios. Novel techniques based on fuzzy logic are introduced to enhance the performance of a tracking system. Specifically, the model-free ...
  • Software Radio para antenas inteligentes en comunicaciones personales multistandard 

    Vidal Manzano, José; Cabrera Beán, Margarita Asuncion; Fonollosa, Javier R; Lagunas Hernandez, Miguel A.; Xavier, Mestre; Mestre Pons, Francesc X.; Pérez Neira, Ana Isabel (Patrocinadores: Alcatel, Indra, Amper y otros, 1998)
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  • Experimental result for a sdma mobile communications antenna array system 

    Goldberg, Jason Matthew; Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A.; Rodríguez Fonollosa, Javier; Vázquez Grau, Gregorio (EE PUBL. EE PUBL., 1996)
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    This paper presents experimental results for a Spatial Division Multiple Access cellular mobile communications system. The basestation antenna array testbed used to obtain the results is described in addition to sophisticated ...
  • High performance doa trackers derived from paralell low resolution detectors 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (IEEE IEEE COMPUTER SOCIETY PRESS, 1996)
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    Traditionally, high resolution spectral direction of arrival (DOA) estimation has been associated with algorithms rather than with a processing scheme or architecture. Motivated by previous work on feasible implementations ...
  • High resolution adaptative arrays based on random processing techniques: frequency hopping modulation 

    Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1995)
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    A new architecture for adaptive arrays using frequency hopping modulation is addressed. The resolution of the array and the interference rejection increase substantially applying random processing to the carrier frequency ...
  • 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)
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    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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    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)
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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 ...
  • 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 ...

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