Now showing items 39697-39716 of 77074

  • Improved capacity lower bounds for fading channels with imperfect CSI using rate splitting 

    Pastore, Adriano; Koch, Tobias; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    As shown by Medard (“The effect upon channel capacity in wireless communications of perfect and imperfect knowledge of the channel,” IEEE Trans. Inform. Theory, May 2000), the capacity of fading channels with imperfect ...
  • Improved component carrier selection considering MPR information for LTE-A uplink systems 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; González González, David (IEEEXPLORE, 2013)
    Conference report
    Restricted access - publisher's policy
    Carrier Aggregation (CA) is one of the key features introduced in LTE Release 10 to achieve higher levels of throughput. Two or more component carriers (CCs) are aggregated and user equipments (UEs) simultaneously transmit ...
  • Improved construction of medium-span concrete viaducts 

    Caballero, Ángel; Turmo Coderque, José (Czech Concrete Society, 2011)
    Conference report
    Restricted access - publisher's policy
    Concreting of span by span construction with travelling scaffolding is typically made in two phases. In the first phase, webs and bottom flange of the box girder are concreted. In the second phase, top flange is concreted. ...
  • Improved convergence of gradient algorithms for adaptive IIR filters 

    Rodríguez Fonollosa, José Adrián; Masgrau Gómez, Enrique José (Institute of Electrical and Electronics Engineers (IEEE), 1989)
    Conference report
    Open Access
    The introduction of a simple correction term in gradient algorithms for adaptive IIR filtering is shown to improve their convergence and robustness. The error surface, i.e. the mean-squared value of the output error as a ...
  • Improved current-source sizing for high-speed high-accuracy current steering d/a converters 

    Miquel, Albiol; González Jiménez, José Luis; Alarcón Cot, Eduardo José (IEEE, 2003)
    Conference report
    Open Access
    This paper describes a design methodology for the basic current source cell circuit of high-speed high-accuracy current steering DIA conveners taking into account mismatching in all the transistors of the cell. Previous ...
  • Improved decryption quality and security of a joint transform correlator-based encryption system 

    Vilardy, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (IOPScience, 2012-12-06)
    Article
    Open Access
  • Improved design of optical ID tags for remote validation 

    Horrillo, Sergi; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Javidi, Bahram (The International Society for Photo-Optical Instrumentation Engineers (SPIE), 2009)
    Conference report
    Open Access
  • Improved digital FM transmission with limiter-discriminator detection 

    Salembier Clairon, Philippe Jean (Institute of Electrical and Electronics Engineers (IEEE), 1988)
    Conference report
    Open Access
    Three techniques for improving the performance of discriminator detection of digital FM are presented. In the first technique, use is made of detection theory to develop an efficient scheme for detecting the occurrence of ...
  • Improved earthquake response via simulation and integrated space- and ground-based technologies: the TREMOR proposal 

    Hochstein, Jason; Rasheed, Adam; Stone, Jennifer; Coffey, Emily; Martin, Annie; Qiang, Feng; Christensen, Ian A.; Borrero del Pino, Cristina (2008)
    Working paper
    Open Access
    Earthquakes occurring around the world each year cause thousands of deaths, millions of dollars in damage to infrastructure, and incalculable human suffering. In recent years, satellite technology has been a significant ...
  • Improved electronic coupling in hybrid organic–inorganic nanocomposites employing thiol-functionalized P3HT and bismuth sulfide nanocrystals 

    Martínez, Luis; Higuchi, S.; MacLachlan, A. J.; Stavrinadis, A.; Miller, N. C.; Diedenhofen, Silke L.; Bernechea, María; Sweetnam, S.; Nelson, J.; Haque, S. A.; Tajima, K.; Konstantatos, Gerasimos (Royal Society of Chemistry, 2014-06-19)
    Article
    Open Access
    In this study, we employ a thiol-functionalized polymer (P3HT-SH) as a leverage to tailor the nanomorphology and electronic coupling in polymer–nanocrystal composites for hybrid solar cells. The presence of the thiol ...
  • Improved entropy based test of uniformity using ranked set samples 

    Mahdizadeh, M.; Arghami, N.R. (Institut d'Estadística de Catalunya, 2013)
    Article
    Open Access
    Ranked set sampling (RSS) is known to be superior to the traditional simple random sampling (SRS) in the sense that it often leads to more efficient inference procedures. Basic version of RSS has been extensively modified ...
  • Improved fault detection and isolation strategy using a bank of interval observers 

    Xu, Feng; Puig Cayuela, Vicenç; Ocampo-Martínez, Carlos; Stoican, Florin; Olaru, Sorin (International Federation of Automatic Control (IFAC), 2014)
    Conference report
    Restricted access - publisher's policy
    In this paper, an improved algorithm for actuator-fault detection and isolation (FDI) using a bank of interval observers is presented, where each interval observer matches one considered system mode. In this approach, ...
  • Improved fault detection and isolation strategy using a bank of interval observers 

    Xu, Feng; Puig Cayuela, Vicenç; Ocampo-Martínez, Carlos; Stoican, Florin; Olaru, Sorin (2014)
    Conference report
    Restricted access - publisher's policy
    In this paper, an improved algorithm for actuator-fault detection and isolation (FDI) using a bank of interval observers is presented, where each interval observer matches one considered system mode. In this approach, ...
  • Improved interference alignment precoding for the MIMO X channel 

    Agustín de Dios, Adrián; Vidal Manzano, José (2011)
    Conference report
    Restricted access - publisher's policy
    We derive a linear transmit precoding scheme based on interference alignment at the transmitters and zero-forcing at the receivers, for the MIMO X channel based on the Generalized Singular Value Decomposition (GSVD) that ...
  • Improved lead and bismuth (n,gamma) cross sections and their astrophysical impact 

    Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme (EDP Sciences, 2007)
    Conference report
    Open Access
    A series of (n,γ) neutron capture measurements on the lead isotopes and bismuth have been carried out at the CERN n TOF installation in the neutron energy range from 1 eV up to 1MeV. At n TOF, contaminations due to ...
  • Improved local pdf estimation in the wavelet domain for generalized lifting 

    Rolon Garrido, Julio Cesar; Salembier Clairon, Philippe Jean (2010)
    Conference report
    Open Access
    Generalized Lifting (GL) has been studied for lossy image compression in [2,3]. It has been demonstrated that the method leads to a significant reduction of the wavelet coefficients energy and entropy. The definition ...
  • Improved logistics of an assembly line 

    Putin Burgos, Carlos (Universitat Politècnica de CatalunyaPolitecnico di Milano, 2011)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    This project has been developed in the plant of Mangeti Marelli SPA. in Corbetta (Milano). It is based on the improvement of a final assembly line from the logistic point of view. In order to reduce the stock volume in the ...
  • Improved method to calculate a water poverty index at local scale 

    Giné Garriga, Ricard; Pérez Foguet, Agustí (2010-11)
    Article
    Open Access
    The Water Poverty Index (WPI) was created as an interdisciplinary indicator to assess water stress and scarcity, linking physical estimates of water availability with the socioeconomic drivers of poverty. This index has ...
  • Improved ML cross-spectral estimation 

    Lagunas Hernandez, Miguel A.; Gasull Llampallas, Antoni (1986)
    Conference report
    Open Access
    This work deals with the use of dedicated filters for cross-spectrum estimation. Basically, the ML cross-spectral estimator can be obtained as the natural extension of the Normalized Maximurn Likelihood procedure, reported ...
  • Improved monitoring framework for local planning in the water, sanitation and hygiene sector: From data to decision-making 

    Giné Garriga, Ricard; Jiménez Fdez. de Palencia, Alejandro; Pérez Foguet, Agustí (2015-09)
    Article
    Restricted access - publisher's policy
    Today, a vast proportion of people still lack a simple pit latrine and a source of safe drinking water. To help end this appalling state of affairs, there is a pressing need to provide policymakers with evidences in which ...