Digital Systems Simulation
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. Performance evaluation of digital TV and LTE systems operating in the 700 MHz band under the effect of mutual interference
Abstract This paper presents results of the assessment of the interference between digital TV systems and LTE systems operating in adjacent bands in the 700 MHz frequency range. Measurement results are presented and used to validate a simulation tool that allows different scenarios of interference between the SBTVD systems and LTE to be created. The simulati
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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2. A Six Degrees-of-Freedom Flight Dynamics Simulation Tool of Launch Vehicles
ABSTRACT: The use of digital simulation has become an essential activity during the development and operation of launch vehicles, due to the complexity of such systems. Of particular interest is the flight dynamics simulation, which investigates the behavior of the vehicle in flight subjected to forces and moments. This work presents a simulation tool suited
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
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3. Novas metodologias para compressão de dados de processos e para o ajuste do Sistema PI
The consolidation of the automation in the chemical industry has brought a challenge: translating the large volume of data in useful information. With the advent of digital systems, the expansion in the development of sensors and sampling methods allowed the acquisition of a large amount of data from the process field. Thus, nowadays, engineers and operators
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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4. Benefícios obtidos na colaboração entre sistemas MES e sistemas de manufatura digital do PLM - Diagnóstico / Benefits obtained in collaboration between mes systems and digital manufacturing systems of PLM
Uma condição necessária para a eficiência econômica das fábricas modernas é a habilidade de adequar - de forma mais rápida e melhor possível - o desempenho dos processos de manufatura às decisões de solicitação de demanda. Nesse sentido, ressaltou-se a importância de compreender as melhores práticas de Tecnologia da Informação (TI) e o cená
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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5. O uso da simulação em ergonomia de concepção: uma reflexão a partir do projeto de uma cabine de ponte rolante em uma refinaria de petróleo
Despite the benefits provided by the ergonomic approach to the design process, their participation is still limited, given that the specifics of workers as gestures and reasoning, in most cases, are not covered by the professionals responsible for developing new systems work. Thus, this work is to present a case study involving the practice of ergonomic desi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2011
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6. On the evolution of remote laboratories for prototyping digital electronic systems
The design of digital electronic systems for industrial applications can benefit in many ways from the prototyping capabilities of field-programmable gate array (FPGA) platforms. This paper presents three evolutionary releases of an FPGA-based remote laboratory and discusses the didactical and technical motivations behind each release, aiming to reduce the o
Publicado em: 2011
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7. 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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8. Impacto das Áreas de Preservação Permanente sobre a erosão hídrica na bacia hidrográfica do Rio da Prata, Castelo-ES / Impact of Permanent Preservation Areas on water erosion in the watershed of River Silver, Castelo-ES
A watershed is the primary unit of water resource management, because their behavior affects the hydrological occurrence and magnitude of water erosion. Hydrologic simulation models, which allow to estimate the hydrology and water erosion, consisting of important management tool to minimize environmental degradation in these units. The Permanent Preservation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/09/2010
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9. DIGITAL SIMULATION SYSTEM OF NEUTRON PARAMETERS OF THE TRIGA IPR-R1 NUCLEAR RESEARCH REACTOR / SISTEMA DIGITAL PARA SIMULAÇÃO DOS PARÂMETROS NEUTRÔNICOS DO REATOR NUCLEAR DE PESQUISA TRIGA IPR-1
The IPR-R1 TRIGA Mark I nuclear research reactor, at the Nuclear Technology Development Center (CDTN), is a pool type reactor cooling by light water. TRIGA reactors (Training, Research, Isotope, General Atomics) were designed for research, training and radioisotope production. The International Atomic Energy Agency (IAEA) recommends the use of safety and fri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2010
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10. Desempenho de codigo turbo quaternario em sistemas de multiplexação por divisão de frequencias ortogonais / Performance of quaternary turbo codes in orthogonal frequency division multiplex systems
This study evaluates the performance of quaternary turbo codes, with generator matrix G = [7, 5] for the constituent convolutional codes and s-random interleaving , in an OFDM transmission system. This performance is measured in terms of bit error rate versus energy per bit to unilateral noise power spectral density ratio. The results obtained are analyzed c
Publicado em: 2010
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11. Projeto e implementação da distribuição de um simulador multinível / Design and implementation of the distribution of a multi-level simulator
O uso de ferramentas de simulação para validar projetos de sistemas digitais é uma prática comum, devido às vantagens que estas trazem ao desenvolvimento destes sistemas, tais como: custo, segurança, velocidade e acuracidade. Porém, a simulação seqüencial de alguns sistemas pode levar várias horas ou até mesmo dias, fazendo desta maneira surgir a
Publicado em: 2010
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12. Códigos LDPC quaternários aplicados à técnica de transmissão OFDM / Quaternary LDPC codes applied to OFDM transmission technique
This dissertation addresses the study of error correcting codes based on sparse non-binary matrices. The LDPC (Low Density Parity Check) codes constitute a efficient family of codes generated by sparse parity check matrices and it is considered as one of the classes of codes that presents the best performance in digital communications systems. LDPC codes ove
Publicado em: 2010