Enviaments recents

  • Self-reference spatial diversity processing for spread spectrum communications 

    Pérez Palomar, Daniel; Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (2000-09)
    Article
    Accés restringit per política de l'editorial
    n this paper, the application of three blind (or selfreference) spatial diversity signal processing methods to Spread Spectrum (SS) communications is described. These methods do not require any kind of side information ...
  • Fourier models for non linear signal processing 

    Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A. (1999-12)
    Article
    Accés restringit per política de l'editorial
    This paper proposes a trigonometric functional extension, hereafter named the Fourier model, as an alternative framework to the Volterra approach for non-linear systems modelling. This work is focused on the general ...
  • Cross-coupled doa trackers 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Kirlin, R L (1997-10)
    Article
    Accés obert
    A new robust, low complexity algorithm for multiuser tracking is proposed, modifying the two-stage parallel architecture of the estimate-maximize (EM) algorithm. The algorithm copes with spatially colored noise, large ...
  • Source reference in CIR beamforming 

    Lagunas Hernandez, Miguel A.; Nájar Martón, Montserrat (1992-01)
    Article
    Accés restringit per política de l'editorial
    This paper presents a procedure for CIR beamforming that avoids SVD-like proceduresm and is derived from the classic CINR solution. The resulting nulls along the direction of the impinging interferers are of the same degree ...
  • Eigendecomposition versus singular value decomposition in adaptive array signal processing 

    Duarte Ortigueira, Manuel; Lagunas Hernandez, Miguel A. (1991-10)
    Article
    Accés restringit per política de l'editorial
    Two important questions in array signal processing are addressed in this paper: the data matrix versus autocorrelation matrix alternative and the recursive implementation of subspace DOA methods. The discussion of the first ...
  • Two-stage code reference beamformer for the reception of frequency hopping modulated signals 

    Nájar Martón, Montserrat; Mestre Pons, Francesc X.; Lagunas Hernandez, Miguel A. (2000-12)
    Article
    Accés obert
    This paper presents a beamforming technique for the reception of frequency hopping (FH) modulated signals, which takes advantage of their inherent frequency diversity. This technique, based on a code reference beamformer, ...
  • Transceiver design framework for multiuser MIMO-OFDM broadcast systems with channel gram matrix feedback 

    Sacristán Murga, Daniel; Payaró Llisterri, Miquel; Pascual Iserte, Antonio (2012-05-17)
    Article
    Accés restringit per política de l'editorial
    This work considers a multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing based multiuser broadcast system with precoding at the transmitter and feedback of channel state information. A ...
  • Differential Feedback of MIMO Channel Gram Matrices Based on Geodesic Curves 

    Sacristán Murga, Daniel; Pascual Iserte, Antonio (2010-12)
    Article
    Accés restringit per política de l'editorial
    This paper proposes a differential quantization strategy to be used in the feedback link of a multiple-input multiple-output (MIMO) communication system. This algorithm is applied to the channel Gram matrix using geodesic ...
  • The effect of broadband matching in simultaneous information and power transfer 

    Ho Yeung, Sai; Kumar Sarkar, Tapan; Salazar Palma, Magdalena; Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel (2015-03-06)
    Article
    Accés obert
    This paper presents the implementation and the effect of broadband matching in simultaneous information and power transfer. The narrowband characteristic of antennas limited the applications of simultaneous information and ...
  • Low-complexity interference variance estimation methods for coded multicarrier systems: application to SFN 

    Caus López, Marius; Pérez Neira, Ana Isabel; Renfors, Markku (2013-10-27)
    Article
    Accés obert
    For single-frequency network (SFN) transmission, the echoes coming from different transmitters are superimposed at the reception, giving rise to a frequency selective channel. Although multicarrier modulations lower the ...
  • Multi-stream transmission for highly frequency selective channels in MIMO-FBMC/OQAM systems 

    Caus López, Marius; Pérez Neira, Ana Isabel (2013-12-03)
    Article
    Accés restringit per política de l'editorial
    This paper addresses the joint design of MIMO precoding and decoding matrices for filter bank multicarrier (FBMC) systems based on OQAM, known as FBMC/OQAM. Existing solutions that support multi-stream transmission only ...
  • A low-complexity method for antenna selection in spatial modulation systems 

    Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013-11-13)
    Article
    Accés restringit per política de l'editorial
    In this Letter, a low-complexity Euclidean distancebased method for antenna subset selection in Spatial Modulation systems is presented. The proposed method avoids the high complexity of both the optimal exhaustive ...

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