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dc.contributor.advisorNikolić, Saša
dc.contributor.otherMilovanović, Gradimir
dc.contributor.otherCvetković, Zlata
dc.contributor.otherStančić, Goran
dc.contributor.otherRaičević, Nebojša
dc.creatorŽivaljević, Dragana U.
dc.date.accessioned2018-06-25T12:59:16Z
dc.date.available2018-06-25T12:59:16Z
dc.date.available2020-07-03T16:02:46Z
dc.date.issued2018-02-26
dc.identifier.urihttp://nardus.mpn.gov.rs/handle/123456789/9532
dc.identifier.urihttp://eteze.ni.ac.rs/application/showtheses?thesesId=5821
dc.identifier.urihttps://fedorani.ni.ac.rs/fedora/get/o:1467/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=533953174
dc.description.abstractIn this PhD thesis two-channel QMF IIR filter banks have been discussed. As a part of this research, direct synthesis of a new IIR filter class, as a lowpass protoype function which satisfies condition for complementary decomposition, has been proposed. Since attenuation characteristic of the new filter class lies in the area between the Butterworth’s and the Elliptic’s attenuation characteristics of the same order, new class has been referred to as Transitional Butter-Elliptic filters. Transfer function of the the lowpass prototype function was separated into two allpass filters by complementary decomposition. Then, lowpass and highpass filters, as power symmetric filter pair, are obtained using those allpass filters. The main advantage of complementary IIR filters based on parallel connection of two allpass filters, is its smaller sensitivity to digital word length change compared to standard filters and low-cost implementation since the same hardware is used for the lowpass and the highpass transfer function. Within the analysis of the new filter class, transfer functions of the odd order with one, two, three and four extremal values of attenuation characteristics in the passband and in the stopband, has been discussed. All types of Transitional filters have been compared with the Butterworth’s and the Elliptic’s filters of the same order. It is shown that in comparison with Butterworth filter, the Transitional filter has better selectivity but lower selectivity than Elliptic filter. However, the proposed new filter class has pure imaginary poles and accuracy in complementary decomposition is at very high level, which the Elliptic filter cannot achieve. Also, the practical realization of the new filter class is easier than for the Elliptic filter since the new class has conjugate-complex zeros on the unit circle and one multiple zero at z = −1. Further, poles and zeros of the Elliptic filter are accumulated near the passband edge and the distance between them decreases as the filter order increases. This requires a very long digital word length for high-order filter realization. The new class filter has approximately equidistant arrangement of poles so it can be realized with shorter digital word length than it is required for the Elliptic filter realization. For Transitional filters class with one extremum of multiplicity L in the passband and in the stopband, closed-form expression for the transfer function coefficients has been obtained. Application of these kind of filters is significant since for sample rate conversion the lowestcomplexity filter is required. With appropriate selection of filters in analysis and synthesis section, the conditions for ii removing the aliasing effects are fulfilled. Magnitude distortions in IIR filter bank can also be completely eliminated and therefore output signal of the QMF bank has only phase distortion. In order to obtain nearly perfect reconstruction of the output signal, the allpass equalizer has been proposed for group delay compensation. Also, effect of the equalizer order on the accuracy of signal reconstruction has been analyzed.en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Нишу, Електронски факултетsr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/33008/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/44004/RS//
dc.rightsopenAccessen
dc.sourceУниверзитет у Нишуsr
dc.subjectDigitalni filtrisr
dc.subjectDigital filtersen
dc.subjectBanke filtarasr
dc.subjectKomplementarna dekompozicijasr
dc.subjectPodopsežno kodovanjesr
dc.subjectIIR filtrisr
dc.subjectButterworthovi filtrisr
dc.subjectEliptiˇcki filtrisr
dc.subjectPrelazna klasa filtarasr
dc.subjectNewton-Raphsonov metodsr
dc.subjectFilter banksen
dc.subjectComplementary decompositionen
dc.subjectSubband codingen
dc.subjectIIR filtersen
dc.subjectButterworth filtersen
dc.subjectElliptic filtersen
dc.subjectTransitional Butter-Elliptic filtersen
dc.subjectNewton- Raphson methoden
dc.titleDirektna sinteza digitalnih filtara za podopsežno kodovanjesr
dc.typedoctoralThesisen
dc.rights.licenseBY
dcterms.abstractНиколић, Саша; Миловановић, Градимир; Цветковић, Злата; Станчић, Горан; Раичевић, Небојша; Живаљевић, Драгана У.; Директна синтеза дигиталних филтара за подопсежно кодовање; Директна синтеза дигиталних филтара за подопсежно кодовање;
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/52321/Zivaljevic_Dragana_U.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/52320/Disertacija.pdf


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