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Ara es mostren els items 33-52 de 252

    • 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 ...

    • 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 ...

    • Assymptotic performance of hierarchical fuzzy interference cancellers for CDMA 

      Pérez Neira, Ana Isabel; Bas, J. (2003)
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      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 ...

    • Autonomous design for the MISO interference channel 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Vázquez, Miguel Ángel (2011)
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      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)
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      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)
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      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 Hernández, Pol; Pérez Neira, Ana Isabel (2017-08-23)
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      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)
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      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)
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    • Centralized vs distributed resource allocation in multi cell OFDMA systems 

      Cicalò, Sergio; Tralli, Velio; Pérez Neira, Ana Isabel (2011)
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      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 ...

    • Challenges in open spectrum systems 

      Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Authorised Shared Access/Licensed Shared Access (ASA/LSA) are a key enabler for an efficient use of the available spectrum in 5G and beyond networks, which will become absolutely compulsory in order to cope with the ...

    • Channel dependent mutual information in index modulations 

      Henarejos Hernández, Pol; Pérez Neira, Ana Isabel; Tato, Anxo; Mosquera Nartallo, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      Mutual Information is the metric that is used to perform link adaptation, which allows to achieve rates near capacity. The computation of adaptive transmission modes is achieved by employing the mapping between the Signal ...

    • Channel norm-bases user scheduling in coordinated multi-point systems 

      Han, Shengqian; Yang, Chenyang; Bengtsson, Mats; Pérez Neira, Ana Isabel (2009)
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      In this paper, we address the problem of user scheduling in downlink coordinated multi-point transmission (CoMP) systems, where multiple users are selected and then served with zero forcing beamformer simultaneously by ...

    • Characterization of the effects of multi-tap filtering on FBMC/OQAM systems 

      Caus, Marius; Pérez Neira, Ana Isabel; Kliks, Adrian (HINDAWI, 2014-06-05)
      Article
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      The filter bank multicarrier modulation based on offset quadrature amplitude modulation (FBMC/OQAM) is being considered as an eligible technology for future wireless communications. However, the orthogonality may be destroyed ...

    • Closed form expressions for maximum delay and jitter in multibeam opportunistic beamforming 

      Zorba, Nizar; Pérez Neira, Ana Isabel (2007)
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      Scheduling in a broadcast (BC) channel based on partial channel state information at the transmitter (CSIT) is carried out through a multibeam opportunistic beamforming technique. Within a more practical perspective, this ...

    • Closed-form multicast precoding for satellite flexible payloads 

      Vázquez Oliver, Miguel Ángel; Artiga Campos, Xavier; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      This paper investigates a novel closed-form noniterative precoding technique for multicast multibeam satellite systems. Next-generation satellite systems will be benefited from the flexible use of the satellite resources ...

    • Closed-loop spatial modulation with antenna selection 

      Wang, Jun-ling; Pérez Neira, Ana Isabel; Zhang, Q.; Meiguo, Gao; Xiaoyan, Bian (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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      The closed-loop scheme of spatial modulation (SM), which feeds back the selected transmit antenna subsets to the transmitter, is presented to overcome the constraint in SM that the number of transmit antennas has to be a ...

    • Co-channel interference cancelation at the user terminal in multibeam satellite systems 

      Pérez Neira, Ana Isabel; Cocco, Giuseppe; Angelone, Martina (2017-01-01)
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      We study the applicability of soft interference cancelation in the forward link of multibeam satellite systems with focus on mobile terminals. We adopt a standard currently used in commercial satellite systems as a ...

    • Co-channel interference cancellation at the user terminal in multibeam satellite systems 

      Cocco, Giuseppe; Angelone, Martina; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      We study the applicability of soft interference cancellation in the forward link of commercial multibeam satellite systems with focus on mobile terminals. We adopt a standard currently used in commercial satellite systems ...

    • Comparison of linear and widely linear processing in MIMO-FBMC systems 

      Caus López, Marius; Pérez Neira, Ana Isabel (VDE Conference Publications, 2013)
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      This paper carries out a comparison between two multi-stream techniques aimed for filter bank multicarrier (FBMC) systems based on the offset quadrature amplitude modulation (OQAM). The first option performs linear processing ...