Exploració per tema "Iterative methods"
Ara es mostren els items 19-38 de 46
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Maximum likelihood estimation of position in GNSS
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-05)
Article
Accés obertIn this letter, we obtain the Maximum Likelihood Estimator of position in the framework of Global Navigation Satellite Systems. This theoretical result is the basis of a completely different approach to the positioning ... -
Method of moments enhancement technique for the analysis of Sierpinski pre-fractal antennas
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-08-31)
Article
Accés obertThe numerical analysis of highly iterated Sierpinski microstrip patch antennas by method of moments (MoM) involves many tiny subdomain basis functions, resulting in a very large number of unknowns. The Sierpinski ... -
Mètodes iteratius per a la resolució d'equacions no lineals
(Universitat Politècnica de Catalunya, 2012-06-28)
Projecte/Treball Final de Carrera
Accés obertEl projecte consisteix en un estudi tant teòric com pràctic d'alguns dels mètodes iteratius sense memòria, emprats per la resolució d'equacions no lineals. Es plantegen i analitzen els cinc mètodes següents: Newton, Txebixev, ... -
Un método simplificado de Newton para calcular la raíz cuadrada de una matriz real simétrica definida positiva
(Universitat Politècnica de Catalunya, 2010)
Article
Accés obert -
Microwave imaging techniques for biomedical applications
(Vincenzo Piuri and Mario Savino, 1999)
Text en actes de congrés
Accés obertMicrowaves have been considered for medical applications involving the detection of organ movements and changes in tissue water content. More particularly cardiopulmonary interrogation via microwaves has resulted in various ... -
ML estimator and hybrid beamformer for multipath and interference mitigation in GNSS receivers
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
Article
Accés obertThis paper addresses the estimation of the code-phase(pseudorange) and the carrier-phase of the direct signal received from a direct-sequence spread-spectrum satellite transmitter. The signal is received by an antenna ... -
Multiresolution hierarchy co-clustering for semantic segmentation in sequences with small variations
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper presents a co-clustering technique that, given a collection of images and their hierarchies, clusters nodes from these hierarchies to obtain a coherent multiresolution representation of the image collection. We ... -
Multiuser resource allocation optimization using bandwidth-power product in cognitive radio networks
(2013-03)
Article
Accés restringit per política de l'editorialIn this paper, the problem of resource allocation optimization is studied for a single-cell multiuser cognitive radio network in the presence of primary user networks. The spectral access of the cognitive radio network is ... -
Negative learning ant colony optimization for network alignment
(Association for Computing Machinery (ACM), 2022)
Text en actes de congrés
Accés obertThe Network Alignment problem is a hard Combinatorial Optimization problem with a wide range of applications, especially in computational biology. Given two (or more) networks, the goal is to find a mapping between their ... -
Nonlinear actuation model for lateral electrostatically-actuated DC-contact RF MEMS series switches.
(JOHN WILEY & SONS INC, 2007-06-01)
Article
Accés obertIn this work, a nonlinear model to predict actuation characteristics in lateral electrostatically-actuated DC-contact MEMS switches is proposed. In this case a parallel-plate approximation cannot be applied. The model ... -
On fairness optimization for NOMA-enabled multi-beam satellite systems
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Text en actes de congrés
Accés obertIn a multi-beam satellite communication system, traffic requests are typically asymmetric across beams and highly heterogeneous among terminals. In practical operations, it is important to achieve a good match between the ... -
Practical algorithms for a family of waterfilling solutions
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-02-28)
Article
Accés obertMany engineering problems that can be formulated as constrained optimization problems result in solutions given by a waterfilling structure; the classical example is the capacity-achieving solution for a frequency-selective ... -
Preconditioning techniques in the analysis of finite metamaterial slabs
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
Article
Accés obertIn the method of moments (MoM) electric field integral equation (EFIE) analysis of slabs of metamaterials, we show that a left-preconditioning scheme by blocks gathering interactions between basis functions belonging to ... -
Quality of transmission estimator retraining for dynamic optimization in optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2021-04-01)
Article
Accés obertOptical network optimization involves an algorithm and a physical layer model (PLM) to estimate the quality of transmission of connections while examining candidate optimization operations. In particular, the algorithm ... -
Quantitative images of large biological bodies in microwave tomography by using numerical and real data
(IEE-INST ELEC ENG, 1996-11-01)
Article
Accés obertA new inverse microwave imaging algorithm is presented which has the ability to obtain quantitative dielectric maps of large biological bodies. By using a priori information, obtained with a first order algorithm, the final ... -
Reduction of the model noise in non-linear reconstruction via an efficient calculation of the incident field: application to a 434 MHz Scanner
(Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés obertMicrowave tomography has been drastically boosted by the development of efficient reconstruction algorithms based on an iterative solution of the corresponding non-linear inverse problem. The accuracy of the electric field ... -
Robust motion estimation using connected operators
(Institute of Electrical and Electronics Engineers (IEEE), 1997)
Text en actes de congrés
Accés obertThis paper discusses the use of connected operators for robust motion estimation The proposed strategy involves a motion estimation step extracting the dominant motion and a ltering step relying on connected operators ... -
Second-order parameter estimation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-07-31)
Article
Accés obertThis work provides a general framework for the design of second-order blind estimators without adopting any approximation about the observation statistics or the a priori distribution of the parameters. The proposed ... -
Self-similar prefractal frequency selective surfaces for multiband and dual-polarized applications
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
Article
Accés obertFrequency-selective surfaces (FSS) that have been designed using the iterative techniques of fractals have been fabricated and measured. Fractals contain many scales of the starting geometry, each of which acts as a ... -
Spectral iterative algorithm for RCS computation in electrically large or intermediate perfectly conducting cavities
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-06-01)
Article
Accés obertA novel algorithm designed to compute efficiently and accurately the high-frequency electromagnetic scattering from open-ended waveguide cavities is presented. The cavity is converted into a stepped-waveguide model so that ...