Now showing items 21-40 of 210

  • A new non-linear system for estimating and suppressing narrowband interference in PN spread spectrum modulation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1998)
    Conference report
    Open Access
    This work develops a novel dynamic fuzzy logic system that, based on a fuzzy basis function expansion, successfully solves the non-linear problem of narrowband interference prediction and rejection in DS-SS. A fuzzy basis ...
  • An innovative interference mitigation approach for high throughput satellite systems 

    Caus, Marius; Pérez Neira, Ana Isabel; Angelone, Martina; Ginesi, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    This paper investigates how to boost the forward link capacity in multibeam satellite systems. Since co-channel interference is the main inhibitor to achieve the full potential of frequency reuse, we propose to mitigate ...
  • A novel approach to MISO interference networks under maximum receive-power regulation 

    Pérez Neira, Ana Isabel; Vázquez Oliver, Miguel Ángel; Lagunas Hernandez, Miguel A. (WSEAS Press, 2018-07-01)
    Article
    Open Access
    An aggressive frequency reuse is expected within the next years in order to increase the spectral ef¿ciency. Multiuser interference by all in-band transmitters can create a communication bottleneck and, therefore, it is ...
  • Antenna array configurations for massive MIMO outdoor base stations 

    Artiga Campos, Xavier; Perruisseau Carrier, Julien; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Massive MIMO predicts unprecedented capacity and energy efficiency improvements in future networks, by the use of base stations with hundreds of antennas. However the crucial question of determining suitable, or even ...
  • Antenna subset selection for spatial modulation: a novel and energy efficient single RF technique 

    Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013)
    Conference report
    Restricted access - publisher's policy
    In this paper, we propose a closed-loop and single RF multiple-input-multiple-output (MIMO) method, particularly suitable for the Uplink of cellular systems, which is based on the low-complexity and recently devised method ...
  • A robust maximin approach for MIMO communications with imperfect channel state information based on convex optimization 

    Pascual Iserte, Antonio; Pérez Palomar, Daniel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2006-01)
    Article
    Open Access
    This paper considers a wireless communication system with multiple transmit and receive antennas, i.e., a multiple-input-multiple-output (MIMO) channel. The objective is to design the transmitter according to an imperfect ...
  • Array antennas for packet transmission networks 

    Pascual Iserte, Antonio; Ahmed, Nada; Pérez Neira, Ana Isabel (2002)
    Conference report
    Open Access
    In the last two decades, adaptive antennas have been applied widely to wireless communication networks with preexisting infrastructure ,i.e networks with base stations. A wide variety of adaptive algorithms has been ...
  • Array covariance error measurement in adaptive parameter estimation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (. WORKSHOP ON ADAPTIVE ALGORITHMS IN COMMUNICATIONS, 1992)
    Conference report
    Open Access
    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 estimation 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1994)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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 ...
  • Assymptotic performance of hierarchical fuzzy interference cancellers for CDMA 

    Pérez Neira, Ana Isabel; Bas, J. (2003)
    Conference report
    Open Access
    This paper presents a hierarchical fuzzy logic canceller that suppresses digital and/or analog interference from a CDMA signal. The optimum filter to remove them is the Conditional Mean Estimator (CME) or the MAP detector ...
  • A suboptimal power allocation algorithm for FBMC/OQAM 

    Caus López, Marius; Pérez Neira, Ana Isabel (2012)
    Conference lecture
    Restricted access - publisher's policy
    This paper tackles the sum-rate maximization in FBMC systems. It is well-known that multipath fading destroys the orthogonality of the subcarriers, which brings a non-convex problem that can be interpreted as the ...
  • A unifying approach to transmit beamforming for the MISO interference channel 

    Vázquez, Miguel Angel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    This paper addresses the problem of optimal beam- forming in the MISO interference channel. Different approaches are known to obtain the Pareto rate region. In this paper, several frameworks are thoroughly analyzed and ...
  • Autonomous design for the MISO interference channel 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Vázquez, Miguel Ángel (2011)
    Conference report
    Restricted access - publisher's policy
    This paper investigates the power control and beamforming design in the MISO-IC (Multiple Input Single Output-Interference Channel) when constraints are placed at the receivers’ input power. In this way regulatory ...
  • Bluetooth: circuits, sistemes i aplicacions en l'entorn de les TIC 

    Aragonès Cervera, Xavier; González, José Luis; Pérez Neira, Ana Isabel; Casadevall Palacio, Fernando José; Paradells Aspas, Josep (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2005-02)
    Conference report
    Open Access
    En el projecte s'han implementat uns mòduls formatius, que inclouen tant una vessant teòrica com una part experimental, que permetin a un estudiant de segon cicle de la ETSETB conèixer i desenvolupar aplicacions sobre un ...
  • Candidate spectral estimation for cognitive radio 

    Rojas, Miguel A.; Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel (2007)
    Conference report
    Open Access
    Introducing a different view point of traditional filter bank approach for spectral estimation it is derived a spectral estimation method able to detect a given spectral shape forming part or contributing to a given data ...
  • Capacity analysis of index modulations over spatial, polarization and frequency dimensions 

    Henarejos, Pol; Pérez Neira, Ana Isabel (2017-08-23)
    Article
    Open Access
    IEEE Determining the capacity of a modulation scheme is a fundamental topic of interest. Index Modulations (IM), such as Spatial Modulation (SMod), Polarized Modulation (PMod) or Frequency Index Modulation (FMod), are ...
  • Capacity analysis of WCC-FBMC/OQAM systems 

    Cans, Marius; Pérez Neira, Ana Isabel; Kliks, Adrian; Bodinier, Quentin; Faouzi, Bader (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    This paper evaluates the capacity of weighted circularly convolved FBMC/OQAM systems. A rigorous mathematical model is derived to calculate the increase of capacity that can be obtained thanks to the lattice structure of ...
  • Cellular internet service: advanced front-end for FDSS 

    Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1999)
    Conference report
    Open Access
  • Centralized vs distributed resource allocation in multi cell OFDMA systems 

    Cicalò, Sergio; Tralli, Velio; Pérez Neira, Ana Isabel (2011)
    Conference report
    Restricted access - publisher's policy
    Radio Resource Management with Inter-cell Interference Coordination (ICIC), is a key issue under investigation for next generation wireless systems such as Long Term Evolution (LTE). Although centralized resource allocation ...