Space Time Codes
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. O ecossistema da Ciência Aberta
Resumo O presente estudo descritivo tem como objetivo apresentar as dimensões da Ciência Aberta e o impacto desse contexto na vida dos pesquisadores. O surgimento de revistas científi cas no século XVII ajudou a promover a Revolução Científi ca,permitindo que os pesquisadores se comunicassem através do tempo e do espaço usando as tecnologias da épo
Transinformação. Publicado em: 23/09/2019
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2. Socioeconomic inequalities in breast cancer mortality in microregions of the Brazilian Northeast
Resumo Objetivos: avaliar a relação entre as taxas corrigidas de mortalidade por câncer de mama e indicadores de condições de vida das idosas das microrregiões do Nordeste brasileiro. Métodos: adotou-se um estudo ecológico nos anos de 2010 e 2015 para as 188 microrregiões do Nordeste utilizando a modelagem de equações estruturais. Os dados de po
Rev. Bras. Saude Mater. Infant.. Publicado em: 22/07/2019
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3. Arithmetic fuchsian groups and space time block codes
In the context of space time block codes (STBCs) the theory of arithmetic Fuchsian groups is presented. Additionally, in this work we present a new class of STBCs based on arithmetic Fuchsian groups. This new class of codes satisfies the property full-diversity, linear dispersion and full-rate. Mathematical subject classification: 18B35, 94A15, 20H10.
Computational & Applied Mathematics. Publicado em: 2011
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4. A formação do gosto musical na crítica jornalística de Herbert Caro no Correio do Povo (1968-1980) : da torre de marfim ao rés do chão
This dissertation intends to analyze how the critic Hebert Caro (1906-1991) entices the liking of classical music, considering that journalism has the mediation function of approximating readers to specialized fields and that the criticism is a fertile expression in this sense. German Jew rooted in Brazil in 1935, Caro was an active figure in Porto Alegre¿s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. Controle de atitude de satélites artificiais utilizando um processador digital de sinais / Attitude control of satellites using a digital signal processor
This work deals with the development and implementation of an attitude control system for an artificial satellite using a Digital Signal Processor (DSP). The dissertation presents a complete study of the attitude movement modeling and control for the continuous time systems case, considering the Linear Quadratic Regulator (LQR) and Linear Quadratic Gaussian
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2010
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6. A natureza da comunicação bios midiática
One of the recurring themes in the reported studies comunicative has been the possibility of proposing another way of dealing with communication that is able to understand the recent changes in the culture caused by the new instrumental technologies of social virtual. This study therefore is to investigate how to structure those bonds mediated by the spread
Publicado em: 2010
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7. CEFAM: Centro EspecÃfico de FormaÃÃo e AperfeiÃoamento ao MagistÃrio: homoerotismo, indisciplina e panoptismo - histÃrias de vida de jovens normalistas em regime integral no Instituto de educaÃÃo do cearà (1992- 1995) / Teaching: homoerocism, indisciplines and panopticism - histories of life of young normalistas in integral regimen in the Instituto de EducaÃÃo do Cearà of it (1992 - 1995)
The objective of this research was to analyze the daily CEFAM with a focus in the practice of homoeroticism, (in)discipline and panopticism life histories of normality that participated in the project of teacher education at the Institute of Education of Cearà between the years 1992-1995. The methodology applied during the research was a survey of the seaso
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/12/2009
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8. Estimação de canais MIMO variantes no tempo usando filtros de Kalman / Time-varying MIMO channel estimation using Kalman filters
In this work we use Kalman filters to estimate time-varying wireless channels in multiple-input, multiple-output (MIMO) systems. First, we propose an optimal estimator (in the minimum mean squared error sense) to track flat channels in orthogonal space-time block coded systems. Due to the orthogonality inherent to these codes, the Kalman filter equations can
Publicado em: 2009
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9. Three-dimensional flow calculations of axial compressors and turbines using CFD techniques.
With the advent of powerful computer hardware, Computational Fluid Dynamics (CFD) has been vastly used by researches and scientists to investigate flow behavior and its properties. The cost of CFD simulation is very small compared to the experimental arsenal as test facilities and wind-tunnels. In the last years many CFD commercial packages were developed an
Publicado em: 2009
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10. The teaching of reading in far schools of Florianópolis: between precribed and taught (1946-1956) / O ensino da leitura em escolas isoladas de Florianópolis: entre o prescrito e o ensinado (1946-1956)
The present research is about the teaching of reading in Far Schools of Florianópolis. The context is the regulation of primary teaching which has occurred in Santa Catarina state since 1946. Because of the state‟s teaching system adaptation to Federal Laws, it was set a regulation for primary teaching schools decree n. 3.735/1946 establishing new tea
Publicado em: 2009
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11. MOBILE BROADBAND IEEE 802.16E-2005 SYSTEMS PLANNING FOR FREQUENCIES BETWEEN 2 AND 11 GHZ / PLANEJAMENTO DE SISTEMAS MÓVEIS EM BANDA LARGA IEEE 802.16E-2005 EM FREQÜÊNCIAS ENTRE 2 E 11 GHZ
The design of mobile broadband systems requires detailed planning due to necessity of maximizing the use of available bandwidth, network capacity, achieve minimum availability levels and minimize network implementation and operational costs. This work presents a design methodology to be employed in mobile broadband systems based on the IEEE Std 802.16-2005 (
Publicado em: 2008
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12. ANÁLISE DA DINÂMICA DA ATENUAÇÃO POR CHUVAS EM REGIÕES TROPICAIS / DYNAMIC ANALYSIS OF RAIN ATTENUATION IN TROPICAL REGIONS
The main effect causing non-availability in radio communication systems operating in frequencies above 10GHz, is the rain attenuation, particularly the heavy convective rain that is predominant in tropical regions. This thesis presents a detailed study and modelling of the dynamics of rain attenuation in terrestrial links and earthspace links, based on data
Publicado em: 2008