Exploració per autor "Nájar Martón, Montserrat"
Ara es mostren els items 49-66 de 66
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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'editorialn 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 ... -
Signal processing for hybridization
Caceres Duran, Mauricio A.; Closas Gómez, Pau; Falletti, Emanuela; Fernández Prades, Carlos; Nájar Martón, Montserrat; Sottile, Francesco (Elsevier, 2011-10)
Capítol de llibre
Accés restringit per política de l'editorialThis chapter presents several signal processing strategies to combine together, in a seamless estimation process, position-related measurements coming from different technologies and/or systems (e.g., TOA and TDOA measurements ... -
Simultaneous DOA estimation based on Kolmogorov's theorem
Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1993)
Text en actes de congrés
Accés obertThe design of a new architecture for signal processing, based on the Kolmogorov's theorem (1957), is addressed. This architecture is applied to solve the problem of source separation. Particularly, an adaptive algorithm ... -
Source reference in CIR beamforming
Lagunas Hernandez, Miguel A.; Nájar Martón, Montserrat (1992-01)
Article
Accés restringit per política de l'editorialThis 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 ... -
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)
Text en actes de congrés
Accés obertThe 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 ... -
Space-time-frequency candidate methods for spectrum sensing
Lagunas Targarona, Eva; Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (2011)
Comunicació de congrés
Accés restringit per política de l'editorialThe basic idea behind Cognitive Radio (CR) is to allow unlicensed users to utilize licensed frequency bands when they do not interfere to the primary (licensed) users. Thus, an important requirement of CR systems is to ... -
Sparse correlation matching-based spectrum sensing for open spectrum communications
Lagunas Targarona, Eva; Nájar Martón, Montserrat (2012-02)
Article
Accés obertTo deal with the current spectrum scarcity problem and exploiting the fact that exclusive access through tightly regulated licensing leads to idle spectrum, cognitive radio has been proposed as a way to reuse this ... -
Sparse multiple relay selection for network beamforming with individual power constraints using semidefinite relaxation
Blanco, Luis; Nájar Martón, Montserrat (2016-02)
Article
Accés obertThis paper deals with the multiple relay selection problem in two-hop wireless cooperative networks with individual power constraints at the relays. In particular, it addresses the problem of selecting the best subset of ... -
Sparsity-based radar imaging of building structures
Lagunas, Eva; Amin, Moeness; Ahmad, Fauzia; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we address imaging of the interior structure of a building using a reduced number of measurements in through-the-wall imaging and urban sensing applications. Unlike majority of the feature detection methods ... -
Spatial sparsity based direct positioning for IR-UWB in IEEE 802.15.4a channels
Lagunas Targarona, Eva; Navarro, Mònica; Closas Gómez, Pau; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we focus on the application of Compressive Sensing (CS) techniques to Impulse Radio (IR) Ultra-WideBand (UWB) positioning systems under indoor propagation environments. Direct Position Estimation (DPE) ... -
Spectral feature detection with Sub-Nyquist sampling for wideband spectrum sensing
Lagunas Targarona, Eva; Nájar Martón, Montserrat (2015-07-01)
Article
Accés obertCompressive sensing (CS) has been successfully applied to alleviate the sampling bottleneck in wideband spectrum sensing leveraging the sparsity described by the low spectral occupancy of the licensed radios. However, the ... -
Subset relay selection in wireless cooperative networks using sparsity-inducing norms
Blanco, Luis; Nájar Martón, Montserrat (2014)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper addresses the problem of multiple relay selection in a two-hop wireless cooperative network. In particular, the proposed technique selects the best subset of relays, in a distributed beamforming scheme, which ... -
Tema 2. Detecció
Cabrera-Bean, Margarita; Nájar Martón, Montserrat; Pagès Zamora, Alba Maria (Universitat Politècnica de Catalunya, 2017)
Pràctica
Accés obert -
The K-filter: a new architecture to model and design non-linear systems from Kolmogorov's theorem
Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A.; Nájar Martón, Montserrat; Pérez Neira, Ana Isabel (1995-07)
Article
Accés obertA new architecture to model and design nonlinear transfer functions is presented using a new formulation for nonlinear systems. This approach follows the guidelines of the mapping theorem due to A. Kolmogorov and it is ... -
TOA Estimation in UWB: Comparison between time and frequency domain processing
Lagunas Targarona, Eva; Taponecco, Lorenzo; Nájar Martón, Montserrat; D'Amico, Antonio (2010)
Text en actes de congrés
Accés obertA comparison between time and frequency domain TOA estimators compliant with the 802.15.4a Standard has been made. The time domain estimator is done in two stages. One has the goal of identify the rst pulse in each symbol ... -
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 obertThis 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, ... -
Two-stage code reference beamformer in mobile communications
Mestre Pons, Francesc X.; Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (1998)
Text en actes de congrés
Accés obertThis paper addresses a new architecture for blind adaptive beamforming when dealing with frequency hopping (FH) modulation in cellular mobile communications systems. The proposed code reference beamformer (CRB) takes ... -
Wall mitigation techniques for indoor sensing within the compressive sensing framework
Lagunas Targarona, Eva; Amin, Moeness G.; Ahmad, Fauzia; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialCompressive sensing (CS) for urban operations and through-the-wall radar imaging has been shown to be successful in fast data acquisition and moving target localizations. However, the research work in this area thus ...