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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Uma fundamenta??o matem?tica para processamento digital de sinais intervalares

Trindade, Roque Mendes Prado 05 June 2009 (has links)
Made available in DSpace on 2014-12-17T14:54:52Z (GMT). No. of bitstreams: 1 RoqueMPT.pdf: 833646 bytes, checksum: 1c8b5455eaf6d2afeefcb65452d2b589 (MD5) Previous issue date: 2009-06-05 / This work deals with a mathematical fundament for digital signal processing under point view of interval mathematics. Intend treat the open problem of precision and repesention of data in digital systems, with a intertval version of signals representation. Signals processing is a rich and complex area, therefore, this work makes a cutting with focus in systems linear invariant in the time. A vast literature in the area exists, but, some concepts in interval mathematics need to be redefined or to be elaborated for the construction of a solid theory of interval signal processing. We will construct a basic fundaments for signal processing in the interval version, such as basic properties linearity, stability, causality, a version to intervalar of linear systems e its properties. They will be presented interval versions of the convolution and the Z-transform. Will be made analysis of convergences of systems using interval Z-transform , a essentially interval distance, interval complex numbers , application in a interval filter. / Este trabalho explora uma fundamenta??o matem?tica, para o processamento digital de sinais sob uma ?ptica da matem?tica intervalar. Pretende explorar o problema aberto de precis?o e de representa??o de dados em sistemas digitais, trabalhando com uma vers?o intervalar de representa??o de sinais. Processamento de sinais ? uma ?rea muito ricae complexa, por isso, faremos um recorte e focaremos em sistemas lineares invariantes no tempo. Existe uma vasta literatura na ?rea, mas mesmo assim, ainda existe alguns conceitos na matem?tica intervalar que precisam ser redefinidos ou elaborados para a constru??o de uma teoria s?lida de processamento de sinais intervalares. Construiremos os fundamentos b?sicos para processamentos de sinais na vers?o intervalar, tais como as propriedades b?sicas linearidade, estabilidade, causalidade, uma vers?o intervalar de sistemas lineares e suas propriedades. Ser?o apresentadas vers?es intervalares da convolu??o e da transformada-Z. Ser? feita an?lise de converg?ncias de sistemas usando a transformada-Z intervalar, uma dist?ncia essencialmente intervalar, n?meros complexos intervalares, aplica??o em um filtro intervalar.

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