Exploració per autor "Pérez Neira, Ana Isabel"
Ara es mostren els items 30-49 de 252
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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)
Text en actes de congrés
Accés restringit per política de l'editorialIn 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 ... -
Array antennas for packet transmission networks
Pascual Iserte, Antonio; Ahmed, Nada; Pérez Neira, Ana Isabel (2002)
Text en actes de congrés
Accés obertIn 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)
Text en actes de congrés
Accés obertThe 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)
Text en actes de congrés
Accés obertThe 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)
Text en actes de congrés
Accés obertThe 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)
Text en actes de congrés
Accés obertThis 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)
Text en actes de congrés
Accés restringit per política de l'editorialThis 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)
Text en actes de congrés
Accés obertEn 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)
Text en actes de congrés
Accés obertIntroducing 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)
Article
Accés obertIEEE 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)
Text en actes de congrés
Accés restringit per política de l'editorialThis 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)
Text en actes de congrés
Accés obert -
Centralized vs distributed resource allocation in multi cell OFDMA systems
Cicalò, Sergio; Tralli, Velio; Pérez Neira, Ana Isabel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialRadio 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)
Text en actes de congrés
Accés restringit per política de l'editorialAuthorised 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)
Text en actes de congrés
Accés restringit per política de l'editorialMutual 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)
Text en actes de congrés
Accés obertIn 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
Accés obertThe 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)
Text en actes de congrés
Accés obertScheduling 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)
Text en actes de congrés
Accés obertThis 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)
Text en actes de congrés
Accés restringit per política de l'editorialThe 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 ...