Arithmetic Fourier Transform
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. EXPLORAÇÃO DE OPERADORES ARITMÉTICOS NA TRANSFORMADA RÁPIDA DE FOURIER / ARITHMETICS OPERATORS EXPLORATION IN FAST FOURIER TRANSFORM
The power consumption reduction in the fast Fourier transform (FFT) is important because applications in battery-powered embedded systems grows daily. Thus this work focuses on the application of techniques to reduce power in specific projects of FFT algorithms. The goal is to achieve an architectural exploration in the FFT core, the decimation in time butte
Publicado em: 2010
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2. ESTIMAÇÃO DE HARMÔNICOS/INTER-HARMÔNICOS: UMA ABORDAGEM MULTITAXA
This dissertation discusses parameter estimation of harmonics/inter-harmonics of electrical signals under time-varying conditions. Two new suitable approaches for processing this kind of signals are proposed. The first one is based on phase error of DFT (Discrete Fourier Transform) result, occurring due to the frequency deviation of input signal. This method
Publicado em: 2008
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3. Estudo teÃrico-experimental de localizadores apicais eletrÃnicos / Electronic apical locators: theoretical and experimental studies
Este trabalho apresenta o projeto, a implementaÃÃo e testes de um novo protÃtipo de localizador apical eletrÃnico (LAE). LAEs sÃo aparelhos utilizados na odontometria, ou seja, na determinaÃÃo do comprimento de trabalho (CT). O CT delimita a profundidade que os instrumentos devem alcanÃar durante o tratamento do canal, e sua correta determinaÃÃo Ã
Publicado em: 2006
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4. AproximaÃÃo espectral e construÃÃo de wavelets com aplicaÃÃes em eletrogastrografia / Spectrum approximation and wavelet design with applications in electrogastrography
Signal analysis is one of the most important areas of Signal Processing. This thesis is divided in three parts, each one addressing a specific topic of signal analysis. The sub-areas were: (i) approximate methods for spectrum evaluation; (ii) wavelet design; and (iii) biomedical signal analysis. The problem of spectrum estimation under constraints of minimal
Publicado em: 2005
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5. DTMF decoding via arithmetic Fourier transform / DecodificaÃÃo de sinais DTMF via transformada aritmÃtica de Fourier
Dual-Tone Multifrequency (DTMF) signalling has manifold applications and has been used in a broad range of modern Telecommunication systems, such as, for instance, telephony, voice mail, e-commerce, and interactive home banking. Due to the ever increasing demand for higher transmission rates in this scenario, the fast decoding of a DTMF signal becomes a high
Publicado em: 2004